Repair and Diagnosis
- A L L Diagnostic Trouble Codes ( DTC )
- Relays and Modules
- Relays and Modules - Accessories and Optional Equipment
- Relays and Modules - Body and Frame
- Relays and Modules - Brakes and Traction Control
- Relays and Modules - Cooling System
- Relays and Modules - Cruise Control
- Relays and Modules - HVAC
- Relays and Modules - Instrument Panel
- Relays and Modules - Lighting and Horns
- Relays and Modules - Powertrain Management
- Relays and Modules - Restraints and Safety Systems
- Relays and Modules - Starting and Charging
- Relays and Modules - Steering and Suspension
- Relays and Modules - Windows and Glass
- Relays and Modules - Wiper and Washer Systems
- Sensors and Switches
- Sensors and Switches - Accessories and Optional Equipment
- Sensors and Switches - Body and Frame
- Sensors and Switches - Brakes and Traction Control
- Sensors and Switches - Cooling System
- Sensors and Switches - Cruise Control
- Sensors and Switches - Engine
- Sensors and Switches - HVAC
- Sensors and Switches - Instrument Panel
- Sensors and Switches - Lighting and Horns
- Sensors and Switches - Powertrain Management
- Sensors and Switches - Computers and Control Systems
- Air Flow Meter/Sensor
- Barometric Pressure Sensor
- Camshaft Position Sensor
- Clutch Switch
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Cylinder Identification Sensor
- EGR Valve Position Sensor
- Ignition Hall Effect Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Knock Sensor
- Manifold Pressure/Vacuum Sensor
- Oxygen Sensor
- Power Steering Pressure Switch
- Pressure Feedback Exhaust Sensor
- Throttle Full Open Switch
- Throttle Position Sensor
- Transmission Position Sensor/Switch
- Vehicle Speed Sensor
- Sensors and Switches - Emission Control Systems
- Sensors and Switches - Fuel Delivery and Air Induction
- Sensors and Switches - Ignition System
- Sensors and Switches - Computers and Control Systems
- Sensors and Switches - Restraints and Safety Systems
- Sensors and Switches - Starting and Charging
- Sensors and Switches - Steering and Suspension
- Sensors and Switches - Transmission and Drivetrain
- Sensors and Switches - Windows and Glass
- Sensors and Switches - Wiper and Washer Systems
- Maintenance
- Alignment
- Tune-up and Engine Performance Checks
- Drive Belt
- Filters
- Hoses
- Fluids
- Brake Bleeding
- Air Bag(s) Arming and Disarming
- Fuses and Circuit Breakers
- Service Reminder Indicators
- Wheels and Tires
- Service Intervals
- Severe Service Defined
- Routine Service
- Normal Service
- 7500 MI or 12000 KM
- 15000 MI or 24000 KM
- 22500 MI or 36000 KM
- 30000 MI or 48000 KM
- 37500 MI or 60000 KM
- 45000 MI or 72000 KM
- 52500 MI or 84000 KM
- 60000 MI or 96000 KM
- 67500 MI or 108000 KM
- 75000 MI or 120000 KM
- 82500 MI or 132000 KM
- 90000 MI or 144000 KM
- 97500 MI or 156000 KM
- 105000 MI or 168000 KM
- 112500 MI or 180000 KM
- 120000 MI or 192000 KM
- Severe Service
- 3000 MI or 4800 KM
- 6000 MI or 9600 KM
- 9000 MI or 14400 KM
- 12000 MI or 19200 KM
- 15000 MI or 24000 KM
- 18000 MI or 28800 KM
- 21000 MI or 33600 KM
- 24000 MI or 38400 KM
- 27000 MI or 43200 KM
- 30000 MI or 48000 KM
- 33000 MI or 52800 KM
- 36000 MI or 57600 KM
- 39000 MI or 62400 KM
- 42000 MI or 67200 KM
- 45000 MI or 72000 KM
- 48000 MI or 76800 KM
- 51000 MI or 81600 KM
- 54000 MI or 86400 KM
- 57000 MI or 91200 KM
- 60000 MI or 96000 KM
- 63000 MI or 100800 KM
- 66000 MI or 105600 KM
- 69000 MI or 110400 KM
- 72000 MI or 115200 KM
- 75000 MI or 120000 KM
- 78000 MI or 124800 KM
- 81000 MI or 129600 KM
- 84000 MI or 134400 KM
- 87000 MI or 139200 KM
- 90000 MI or 144000 KM
- 93000 MI or 148800 KM
- 96000 MI or 153600 KM
- 99000 MI or 158400 KM
- 102000 MI or 163200 KM
- 105000 MI or 168000 KM
- 108000 MI or 172800 KM
- 111000 MI or 177600 KM
- 114000 MI or 182400 KM
- 117000 MI or 187200 KM
- 120000 MI or 192000 KM
- 150000 MI or 240000 KM
Service and Repair
Technical Service Bulletins
- Engine, Cooling and Exhaust
- Engine
- Compression Check
- Camshaft, Lifters and Push Rods
- Cylinder Block Assembly
- Cylinder Head Assembly
- Drive Belts, Mounts, Brackets and Accessories
- Engine Lubrication
- Intake Manifold
- Lamps and Indicators - Engine
- Seals and Gaskets
- Sensors and Switches - Engine
- Timing Components
- Tune-up and Engine Performance Checks
- Water Pump
- Service and Repair
Specifications- Technical Service Bulletins
- Cooling System
- Coolant
- Radiator Cooling Fan
- Engine - Coolant Temperature Sensor/Switch
- Heater Core
- Lamps and Indicators - Cooling System
- Radiator Cap
- Relays and Modules - Cooling System
- Sensors and Switches - Cooling System
- Temperature Gauge
- Temperature Warning Lamp/Indicator
- Thermostat
- Water Pump
Testing and Inspection
Locations- Service and Repair
- Specifications
- Technical Service Bulletins
- Exhaust System
- Engine
- Powertrain Management
- Relays and Modules - Powertrain Management
- Sensors and Switches - Powertrain Management
- Sensors and Switches - Computers and Control Systems
- Air Flow Meter/Sensor
- Barometric Pressure Sensor
- Camshaft Position Sensor
- Clutch Switch
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Cylinder Identification Sensor
- EGR Valve Position Sensor
- Ignition Hall Effect Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Knock Sensor
- Manifold Pressure/Vacuum Sensor
- Oxygen Sensor
- Power Steering Pressure Switch
- Pressure Feedback Exhaust Sensor
- Throttle Full Open Switch
- Throttle Position Sensor
- Transmission Position Sensor/Switch
- Vehicle Speed Sensor
- Sensors and Switches - Emission Control Systems
- Sensors and Switches - Fuel Delivery and Air Induction
- Sensors and Switches - Ignition System
- Sensors and Switches - Computers and Control Systems
- Tune-up and Engine Performance Checks
- Computers and Control Systems
- A/C Signal
- Air Flow Meter/Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Auxiliary Air Valve (Idle Speed)
- Barometric Pressure Sensor
- Brake Signal
- Camshaft Position Sensor
- Clutch Switch
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Cylinder Identification Sensor
- Diagnostic Mode Switch/Connector
- EGR Backpressure Transducer
- EGR Valve Position Sensor
- Engine Control Module
- Ignition Hall Effect Sensor
- Idle Speed/Throttle Actuator - Electronic
- Information Bus
- Integrated Control Relay Module
- Knock Sensor
- Main Relay (Computer/Fuel System)
- Malfunction Indicator Lamp
- Manifold Pressure/Vacuum Sensor
- Oxygen Sensor
- Power Steering Pressure Switch
- Pressure Feedback Exhaust Sensor
- Relays and Modules - Computers and Control Systems
- Sensors and Switches - Computers and Control Systems
- Air Flow Meter/Sensor
- Barometric Pressure Sensor
- Camshaft Position Sensor
- Clutch Switch
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Cylinder Identification Sensor
- EGR Valve Position Sensor
- Ignition Hall Effect Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Knock Sensor
- Manifold Pressure/Vacuum Sensor
- Oxygen Sensor
- Power Steering Pressure Switch
- Pressure Feedback Exhaust Sensor
- Throttle Full Open Switch
- Throttle Position Sensor
- Transmission Position Sensor/Switch
- Vehicle Speed Sensor
- Throttle Full Open Switch
- Throttle Position Sensor
- Transmission Position Sensor/Switch
- Vehicle Speed Sensor
Service Precautions
Description and Operation- Testing and Inspection
- Flow of Diagnosis
- Initial Inspection and Diagnostic Overview
- Diagnostic Strategies
- Testing Notes - Start Here
- Customer Information Worksheet
- Verifying Customer Complaint
- Checking the Basics
- Quick Test Description
- General Testing Description
- Continuous Monitor Diagnostic Mode (Wiggle Test) Description
- Computed Timing Check Description
- Cylinder Balance Diagnostic Test Mode (SEFI Only) Description
- Output State Diagnostic Test Mode (DTM) Description
- Key On Engine Off (KOEO) Self Test Description
- Key On Engine Running (KOER) Self Test Description
- Initial Inspection
- Diagnostic Strategies
- Reading and Clearing Diagnostic Trouble Codes
- Reading Diagnostic Trouble Codes
- Base Ignition Timing Check
- Continuous Monitor Diagnostic Test Mode (Wiggle Test)
- Cylinder Balance Test
- Output State Diagnostic Test Mode
- Quick Test Appendix (Detailed Testing Instructions)
- Clearing Diagnostic Trouble Codes
- Reading Diagnostic Trouble Codes
- Diagnostic Trouble Code Tests and Associated Procedures
- Symptom Related Diagnostic Procedures
- Symptom Cross Reference Chart
- Diagnostic Routines
- Automatic Transmission Shift Concern
- Backfires On Idle, Acceleration or Cruise
- Emission Compliance
- Engine Noise (Under Hood)
- Engine Overheats
- Engine Runs Cold
- Engine Will Not Crank
- Exhaust System Concerns (Visual Smoke)
- Fast Idle, Diesels/Runs On
- Fuel System Concerns (Odor)
- Hard Start/Long Crank
- High Oil Consumption
- Lack/Loss of Power On Acceleration or Cruise
- Low Idle, Stalls/Quits On Deceleration
- Manual Transmission Shift Concerns (Shift Light/Chime On)
- No Start/Normal Cranking
- Poor Fuel Economy
- Rolling Idle, Runs Rough at Idle
- Runs Rough/Misses On Acceleration or Cruise
- Slow Return to Idle
- Spark Knock On Acceleration or Cruise
- Stalls After Starting
- Stalls, Quits, Bucks, Jerks, Hesitates, Stumbles, or Surges
- Surges On Cruise
- Vibration Concerns
- Warning Indicators (MIL, DCL, SIL)
- Symptom Charts
- Pinpoint Tests
- AA - No Start Test
- AA - Test Schematic
- AA - Testing Notes
- AA1 - Attempt to Crank Engine
- AA2 - Check For VREF At Throttle Position Sensor
- AA3 - Check For Spark At Plugs
- AA4 - Check For Spark At Coil
- AA5 - Check Continuity of Ignition Ground Circuit
- AA6 - Isolating of Problem to Spout Circuit
- AA7 - Check Spout Signal
- AA8 - Check Spout and PIP Circuit For Short to Power
- AA9 - Check Spout and PIP Circuit For Short to Ground
- AA10 - Isolate Short(s) In Processor
- AA11 - Check PIP Signal
- AA12 - Check Continuity of PIP Circuit
- AA13 - Spout Signal Verification
- AA14 - Attempt to Restart Vehicle
- AA15 - Check Continuity of PIP Circuit
- AA16 - Check Continuity of PIP Circuit
- AA17 - Check PIP Circuit For Shorts to Power and Ground
- AA18 - Isolate Shorts In Processor
- AA19 - Check PIP Signal
- AA20 - Check Fuel Pressure
- AA21 - Check Inertia Switch Resistance
- AA25 - Check VPWR Circuit Voltage
- AA26 - Check VPWR Continuity
- B - Vehicle Battery
- B - Test Schematic
- B - Testing Notes
- B1 - Check Battery Voltage
- B2 - Check Power Ground Circuit Continuity
- B3 - Check for Open Between SIG RTN PWR GND Ckt At Processor
- B4 - Check Signal Return Circuit Continuity
- B5 - Check KAPWR Circuit Voltage At EEC Power Relay
- B6 - Check Ignition Circuit Voltage At EEC Power Relay
- B7 - Check Power Ground Circuit Continuity
- B8 - Check VPWR Circuit Continuity
- B9 - Check VPWR Circuit Voltage
- C - Reference Voltage
- C - Testing Notes
- C - Wiring Diagram
- C1 - Check Vehicle Battery Power Circuit
- C2 - Check VREF Voltage
- C3 - Check VREF and SIG RTN Circuits For Continuity
- C4 - Check For Excess Voltage On VREF Circuit
- C5 - Check For Shorted Throttle Position Sensor
- C6 - Check For Shorted EVP/PFE/DPFE Sensor
- C7 - Check For Shorted MAP/BP Sensor
- C8 - Check For Shorted 4EAT Module
- C9 - Check VREF Circuit For Short to Ground
- DA - Temperature Sensor Test ACT and ECT
- DA - Sensor Data
- DA - Testing Notes
- DA - Testing Schematic
- DA1 - Code 21/116 or 24/114: Check Temperature Sensor
- DA2 - Check VREF Circuit Voltage At Throttle Position Sensor
- DA3 - Check Resistance of Temperature Sensor W/Engine Off
- DA4 - Check Resistance of Temperature Sensor W/Engine Running
- DA10 - Code 51/118 or 54/113: Induce Opposite Code
- DA11 - Check Continuity of Sensor Signal and SIG RTN Circuits
- DA20 - Code 61/117 or 64/112 Induce Opposite Code
- DA21 - Check VREF Circuit Voltage At Throttle Position Sensor
- DA22 - Check Temperature Sensor Circuit For Short to Ground
- DA90 - Continuous Memory Codes 51/118, 54/113, 61/117, 68/112
- DA91 - Check EEC-IV Vehicle Harness
- DA92 - Check Processor and Vehicle Harness Connectors
- DA100 - Continuous Memory Code 338
- DA101 - Continuous Memory Code 339
- DB - EGR Temperature Sensor
- DB - Testing Notes
- DB - Testing Schematic
- DB1 - Continuous Memory Code 327: Verify Condition
- DB2 - Induce Opposite Code
- DB3 - Check EGRT Circuit For Shorts to Ground
- DB5 - Continuous Memory Code 337: Verify Condition
- DB6 - Check EGRT Circuit For Shorts to Power
- DB7 - Induce Opposite Code
- DB8 - Check Continuity of Harness Circuits
- DB10 - Continuous Memory Code 326: Check Engine Idle
- DB11 - Verify Condition
- DB12 - Check Continuity of Harness Circuits
- DB20 - Continuous Memory Code 332: Check EGR Valve Holds Vacuum
- DB21 - Check EGR Valve Operation
- DB22 - Check For Continuous Memory Code 326
- DB90 - Check EEC-IV Vehicle Harness
- DB91 - Check Processor and Harness Connectors
- DC - Mass Air Flow (MAF) Sensor
- DC - Sensor Data
- DC - Testing Notes
- DC - Testing Schematic
- DC1 - Check VPWR Circuit Voltage
- DC2 - Check MAF Sensor Ground
- DC10 - 66/157, 72/129 - Check Continuity of MAF and VPWR Ckts
- DC11 - Check MAF For Shorts to Ground and MAF Rtn Circuit
- DC12 - Check PWR Ground Circuit Continuity
- DC13 - Check MAF Rtn Circuit Continuity
- DC14 - Check MAF Circuit For Short to Ground
- DC15 - Check MAF Circuit Output
- DC16 - Check MAF Circuit Output
- DC20 - Code 56/158: Rerun Self-Test W/MAF Sensor Disconnected
- DC21 - Check MAF Circuit For Short to VPWR
- DF - Manifold Absolute Pressure (MAP)/Barometric Pressure (BP)
- DG - Knock Sensor
- DG - Testing Notes
- DG - Testing Schematic
- DG1 - Service Code 25/225: Generate Knock Manually
- DG2 - Check KS Circuit Voltage
- DG3 - Check Continuity of KS and SIG RTN Circuits
- DG4 - Check KS Circuit For Short to Ground
- DG5 - Check KS Circuit For Short to Power
- DG6 - Test Processor With Substitute Knock Sensor
- DH - Throttle Position (TP) Sensor
- DH - Sensor Data
- DH - Test Schematic
- DH - Testing Notes
- DH1 - Engine Running Service Code 23/121
- DH2 - Service Code 23/121: Check For Stuck Throttle Plate
- DH3 - Service Code 53/123: Attempt to Generate Code 63/122
- DH4 - Check VREF Circuit Voltage
- DH5 - Check For Shorted 4EAT Module
- DH6 - Check TP Circuit For Shorts to Power
- DH10 - Service Code 63/122
- DH11 - Check VREF Circuit Voltage
- DH12 - Check TP Circuit Continuity
- DH13 - Check For Shorted 4EAT Module
- DH14 - Check TP Circuit For Short to Ground
- DH20 - Engine Running Service Code 73/167
- DH21 - Check TP Sensor Movement During Dynamic Response Test
- DH90 - Continuous Memory Code 53/123
- DH91 - Measure TPS Voltage While Exercising Sensor
- DH92 - Check EEC Vehicle Harness
- DH93 - Check Processor and Harness Connectors
- DH94 - Continuous Memory Code 63/122
- DH95 - Check EEC Vehicle Harness
- DH96 - Check Processor and Harness Connectors
- DL - PFE/DPFE Sensor; EVR Solenoid Testing
- DL - Sensor Data
- DL - Testing Notes
- DL - Testing Schematic
- DL1 - Code 31/327: Induce Code 35/337
- DL2 - Measure VREF Circuit Voltage
- DL3 - Check PFE/DPFE Circuit Continuity
- DL4 - Check PFE/DPFE Circuit For Shorts to Ground and SIG RTN
- DL5 - Code 35/337: Induce Code 31/327
- DL6 - Measure VREF Circuit Voltage
- DL7 - Check PFE/DPFE Circuit For Short to Power
- DL8 - Service Code 34/335: Verify Engine Running Codes
- DL9 - Check PFE/DPFE Sensor Pressure Input Hose(s)
- DL10 - Measure VREF Circuit Voltage
- DL11 - Service Code 84/558: Measure EVR Solenoid Resistance
- DL12 - Check VPWR Circuit Voltage
- DL13 - Check EVR Circuit Continuity
- DL14 - Check EVR Circuit For Short to Power or Ground
- DL20 - Service Code 32/326: Verify Engine Running Codes
- DL21 - Service Code 31/327: Self-Test W/Vacuum Disconnected
- DL22 - Check PFE/DPFE Sensor Pressure Input Hose For Blockage
- DL25 - Engine Running Codes 34/336 & 35/337
- DL26 - Check PFE Signal Voltage
- DL27 - Check PFE and SIG RTN Harness Circuit Continuity
- DL28 - Check PFE Harness Circuit For Shorts to Power
- DL30 - Code 33/332: Verify Vacuum Present At EGR Valve
- DL31 - Check Vacuum Input to the EVR Solenoid
- DL36 - Check Signal At the PFE/DPFE Inlet Hose(s)
- DL37 - Check EGR Valve Operation
- DL38 - Attempt to Generate KOEO Service Code 35/337
- DL39 - Measure VREF Circuit Voltage
- DL40 - Check PFE/DPFE Harness Circuit Continuity
- DL41 - Check PFE/DPFE Harness For Shorts to Ground & Sig Rtn
- DL50 - Engine Code: 34/336 & 35/337
- DL51 - Check DPFE Signal Voltage With Engine At Idle
- DL52 - Check EGR Valve For Binding
- DL90 - Continuous Memory Code 31/327 or 34/336
- DL91 - Check EEC-IV Vehicle Harness
- DL92 - Check Processor and Vehicle Harness Connectors
- DL93 - Continuous Memory Code 34/336
- DL94 - Continuous Memory Code 32/326
- DL95 - Inspect Vacuum Lines Between EVR Solenoid and EGR Valve
- DL96 - Inspect EVR Filter
- DL97 - Attempt to Remove the Drive Symptom
- DL98 - Rerun Self-Test With EGR Valve Vacuum Line Disconnected
- DL99 - Check PFE/DPFE Sensor Pressure Inlet Hose For Blockage
- DL100 - Continuous Memory Code 33/332: Check EGR Valve
- DL101 - Inspect EVR Solenoid Hoses
- DL102 - Inspect PFE/DPFE Signal Line
- DL103 - Inspect EVR Solenoid
- DL104 - Check EGR Valve For Sticking
- DL105 - Check EGR Solenoid and Hoses
- DL106 - Check EGR Solenoid For Shorts
- DL107 - Check EVR Harness Circuit For Intermittents
- DP - Vehicle Speed Sensor (VSS)
- DS - Programmable Speedometer/Odometer Module
- FD - Brake On/Off (BOO) Switch
- FD - Testing Notes
- FD - Testing Schematic
- FD1 - Service Code 74/536: Verify Brake Was Pressed
- FD2 - Check Operation of Stoplamps
- FD3 - Check For BOO Circuit Cycling
- FD4 - Check For Power to Brake Switch
- FD5 - Verify Brake Switch Is Not Always Closed
- FD6 - Check For Short to Power In Processor
- FD7 - Check Short to Power In Brake/Shift Interlock Solenoid
- FD10 - Service Code 75/531: Check Operation of Brake Lamps
- FD11 - Check BOO Circuit Continuity
- FD90 - Check For Proper Stoplamp Switch Installation
- FD91 - Check Stoplamp Ground
- FD92 - Check Stoplamp/BOO Circuits For Short to Power
- FD93 - Check Stoplamp Circuit Continuity
- FD94 - Check BOO Circuit Continuity
- FD99 - Road Test
- FE - Electrical Load Inputs
- FE - Testing Notes
- FE - Testing Schematic
- FE1 - Electrical Load Switch Test Direction
- FE10 - Check Voltage of BLR Circuit, Low Speed Position
- FE11 - Check Voltage of BLR Circuit, High Speed Position
- FE12 - Check BLR Circuit For Short to Power
- FE13 - Check BLR Circuit Continuity
- FE14 - Check BLR Circuit For Short to Ground
- FE20 - Check Voltage of DRL Circuit, Park Brake & Headlamps On
- FE21 - Check Voltage of DRL Circuit, Park Brake & Headlamps Off
- FE22 - Check DRL Circuit For Short to Power
- FE23 - Check DRL Circuit Continuity
- FE24 - Check DRL Circuit For Short to Ground
- FE30 - Check Voltage of HDL Circuit, Headlamps Off
- FE31 - Check Voltage of HDL Circuit, Headlamps On
- FE32 - Check HDL Circuit Continuity
- FE33 - Check HDL Circuit For Short to Ground
- FE34 - Check HDL Circuit For Short to Power
- FE40 - Check Voltage of DEF Circuit, Defrost Off
- FE41 - Check Voltage of DEF Circuit, Defrost On
- FE42 - Check DEF Circuit For Short to Power
- FE43 - Check DEF Circuit For Continuity
- FE44 - Check DEF Circuit For Short to Ground
- FF - Power Steering Pressure (PSP) Switch
- FF - Testing Notes
- FF - Testing Schematic
- FF1 - Service Code 52/519: Attempt to Eliminate Code 52/519
- FF2 - Check Continuity of PSPS Circuit
- FF3 - Check PSPS Operation
- FF4 - Check PSPS Circuits For Shorts
- FF5 - Verify Operator Interaction Service Code 52/521
- FF6 - Determine If the Processor Can Identify an Open Circuit
- FF7 - Check PSPS Circuits For Shorts
- FF8 - Check PSPS State With KOEO vs. KOER
- FF9 - Check PSPS State With Engine Running and Load vs. No Load
- FF10 - Service Code 519: Attempt to Eliminate Code 519
- FF11 - Check PSPS Circuit For Short
- FF15 - Check PSPS Operation
- FF16 - Check Continuity of PSPS Circuits
- FF20 - Service Code 521: Verify Operator Interaction
- FF21 - Determine If the Processor Can Identify A Closed Circuit
- FF22 - Check Continuity of PSPS Circuit
- FF23 - Check PSPS State W/Key On Engine Off Vs. Engine Running
- FF24 - Check PSPS State w/Engine Running and Load vs. No Load
- G - In-Range MAF/TPS/Fuel Injector Pulse Width Test
- G - Testing Notes
- G1 - Throttle Position Sensor Integrity
- G2 - Check Throttle Body
- G3 - Check MAP/BP Sensor Output
- G4 - Check ACT Sensor
- G5 - Visually Inspect MAF Sensor
- G6 - Check MAF Sensor
- G7 - Visual Vacuum Checks
- G8 - Check Fuel Pressure
- G9 - Check Systems Ability to Hold Fuel Pressure
- G10 - Cylinder Balance Test
- H - Fuel Control
- H - Fuel Injector Resistance Specification Table
- H - Fuel Pressure Specification Table
- H - Test Schematic
- H - Testing Notes
- H1 - Check For Contaminated Engine Oil
- H2 - Check Fuel Pressure
- H3 - Check Systems Ability to Hold Fuel Pressure
- H4 - Fuel Delivery Test
- H5 - Cylinder Balance Test: EFI Engines
- H6 - Cylinder Balance Test: SEFI Engines Only
- H7 - Check Resistance of Injector(s) and Harness EFI Engines
- H8 - Check Resistance of Injector(s) and Harness SEFI Engines
- H9 - Check Continuity of Fuel Injector Harness
- H10 - Check Injector Harness Circuit For Short to Power/Ground
- H11 - Isolate Faulty Injector Circuit
- H12 - Check Injector Driver Signal
- H13 - Check Thermactor Operation
- H14 - Check HEGO Integrity
- H15 - Check HEGO Sensor On Engines With MAP Sensor
- H16 - Check HEGO Sensor On Engines With MAF Sensor
- H17 - Check Continuity of HEGO Signal Circuit and HEGO Ground
- H18 - Check HEGO Circuit For Short to Ground
- H19 - Check HEGO Sensor For Short to Ground
- H20 - Attempt to Eliminate Code 41/172, 91/136 or 176
- H21 - Check Resistance of Heated Element On HEGO
- H22 - Check For Power At HEGO Harness Connector
- H23 - Check Continuity of Power Ground Circuit
- H24 - Check HEGO Signal For Short to Power
- H25 - Check For Short to Power
- H26 - Check HEGO Sensor For Short to Ignition Run Circuit
- H27 - Attempt to Generate Code 41/172, 91/136, 176
- H28 - Check MAP Sensor For Vacuum Leak
- H29 - Check For Loss of Vacuum to MAP Sensor
- H30 - HEGO Sensor Check
- H90 - Check Continuous Monitor Mode
- H91 - Continuous Monitor Test Drive Check
- H92 - Check HEGO Switching
- HA - Adaptive Fuel
- HA - Fuel Pressure Specifications
- HA - MAP/BP Sensor Data
- HA - Testing Notes
- HA1 - Continuous Codes 181, 183, 189, 192
- HA2 - Run Cylinder Balance Test
- HA3 - Check For Vacuum/Air Induction Leak
- HA4 - Check For Low Fuel Pressure
- HA5 - Check Systems Ability to Hold Fuel Pressure
- HA6 - Check MAP/BP Frequency
- HA7 - Check For Proper Battery Voltage to Fuel Injectors
- HA8 - Verify That Canister Purge Solenoid Is Not Stuck Closed
- HA9 - Check Thermactor System For Upstream Air Leak
- HA15 - Continuous Codes 179, 182, 188, 191: Is Vehicle SEFI/EFI
- HA16 - Run Cylinder Balance Test
- HA17 - Check For Excessive Fuel Pressure
- HA18 - Check Systems Ability to Hold Fuel Pressure
- HA19 - Check MAP/BP Frequency
- HA20 - Check Throttle Body and Air Induction System
- HA21 - Verify That Canister Purge Solenoid Will Hold Vacuum
- HA25 - Check PCV Valve
- HA26 - Check HEGO Heater Circuit
- HA27 - Inspect HEGO Sensor For Contamination
- HA28 - Verify Excessive Vacuum Is Not At EGR Valve During Idle
- HA29 - Verify EGR Valve Is Fully Seated
- HA30 - Check Cooling System
- HA35 - Check Ignition System
- HA36 - Flow Check Injectors
- HA37 - Check Cylinder Compression
- HA40 - Road Test
- J - Fuel Pump Circuit
- J - Testing Notes
- J1 - No Fuel Pump Pressure: Check Fuel Pump Electrical Op.
- J2 - Check For VPWR to Processor
- J3 - Check For Voltage to Power-to-Pump Circuit
- J4 - Check For Battery(+) to Fuel Pump Relay
- J5 - Check For Voltage At Power-to-Pump Circuit
- J7 - Service Code 87/556: Check For VPWR to Fuel Pump Relay
- J8 - Check Fuel Pump Relay
- J9 - Check Fuel Pump Circuit For Short to Power
- J10 - Check Fuel Pump Circuit For Short to Ground
- J11 - Check Fuel Pump Circuit Continuity
- J20 - Service Code 95/542: Does Engine Start
- J21 - Verify That Fuel Pump Is Off
- J22 - Check For Fuel Pump Relay Always Closed
- J23 - Check FPM Circuit Continuity
- J25 - Check Inertia Switch
- J30 - Service Code 96/543: Does Engine Start
- J31 - Check For Battery(+) to Fuel Pump Relay
- J33 - Check Power to Pump Circuit Continuity
- J35 - Check Left/Front HEGO Sensor For Short to Power
- J36 - Check HEGO Circuit For Short to Power
- J90 - Continuous Code 95/542: Check EEC-IV Harness
- J91 - Check FPM Circuit
- J92 - Check For Shorts to Power
- J93 - Continuous Code 96/543: Check Code 87/556
- J94 - Check EEC-IV Harness
- J95 - Continuous Code 87/556: Check EEC-IV Harness
- J96 - Check Left/Front HEGO Circuit For Short to Power
- J99 - Road Test
- KA - EGR Vacuum Regulator Solenoid
- KA - Testing Notes
- KA - Testing Schematic
- KA1 - KOEO Service Code 558: Enter Output State Check
- KA2 - Check EVR Solenoid Electrical Operation
- KA3 - Check EVR Solenoid Valve Operation
- KA4 - Check Vacuum Hose From the EVR Solenoid to Throttle Body
- KA5 - Check Vacuum Hose From EVR to Back Pressure Transducer
- KA6 - Check EVR Solenoid VPWR
- KA7 - Check Continuity of EVR Solenoid Signal Harness Circuit
- KA8 - Check EVR Solenoid Signal Harness Circuit For Short
- KD - Canister Purge (CANP) Solenoid
- KD - Testing Notes
- KD - Testing Schematic
- KD1 - Enter Output State Diagnostic Test Mode
- KD2 - Check Canister Purge Solenoid Electrical Operation
- KD3 - Check Canister Purge Solenoid For Vacuum Leaks
- KD4 - Check Canister Purge Solenoid For Mechanical Operation
- KD5 - Check For Vacuum to Canister Purge Solenoid
- KD6 - Service Code 85/565, 569: Check CANP Solenoid Resistance
- KD7 - Check VPWR Circuit Voltage
- KD8 - Check Continuity of CANP Circuit
- KD9 - Check CANP Circuit For Short to Ground
- KD10 - Check CANP Circuit For Short to Power
- KE - Idle Speed Control
- KE - Test Notes
- KE - Test Schematic
- KE1 - Service Code 12/412, 16: Check For RPM Drop
- KE2 - Check For EGR Codes
- KE3 - Check For Other EEC Codes
- KE4 - Measure ISC Solenoid Resistance
- KE5 - Check For Internal Short to ISC Solenoid Case
- KE6 - Check VPWR Circuit Voltage
- KE7 - Check ISC Circuit Continuity
- KE8 - Check ISC Circuit For Short to Ground
- KE9 - Check ISC Circuit For Short to Power
- KE10 - Check For ISC Signal From the Processor
- KE11 - Check Idle
- KE12 - Check For Problems Affecting Proper Engine Speed
- KE15 - Code 13/411
- KE16 - Check For Conditions Affecting Idle
- KE17 - Check For Internal Short to ISC Solenoid Case
- KE18 - Check ISC Circuit For Short to Ground
- KE19 - Check Processor Output
- KE20 - Check For Proper Engine Coolant Flow to ISC-BPA Valve
- KE25 - Lack High Idle W/Cold: Verify ISC-BPA Not Stuck Closed
- KL - Shift Indicator Light (SIL)
- KL - Testing Notes
- KL1 - Check SIL Light
- KL2 - Check SIL Circuit Fuse
- KL3 - Check SIL Bulb
- KL4 - Check SIL Dimmer Relay Continuity
- KL5 - Check SIL Dimmer Relay Function
- KL6 - Check Voltage At SIL Dimmer Relay
- KL7 - Check Voltage At Top Gear Switch
- KL8 - Check Operation of Top Gear Switch
- KL9 - Check Continuity of SIL Circuit
- KL10 - Check SIL Circuit For Short to Ground
- KL15 - Check For Voltage to SIL Socket
- KL16 - Check Operation of Top Gear Switch
- KL17 - Check Continuity of SIL Circuit
- KL18 - Operation of the Thunderbird SC SIL
- KL19 - Check SIL Circuit Fuse
- KL20 - Check SIL Bulb
- KL21 - Check For Voltage to SIL Socket
- KL22 - Check Continuity of SIL Circuit
- KL23 - Check SIL Circuit For Short to Ground
- KM - WOT A/C Cut-Off (WAC) A/C Demand
- KM - Testing Notes
- KM1 - No A/C: Check For Voltage to A/C Clutch
- KM2 - Check Power-to-Clutch Circuit Continuity
- KM3 - Check For Power On A/C Demand Circuit
- KM4 - Check Continuity Between WAC Relay and A/C Relay
- KM5 - Check WAC Circuit For Short to Ground
- KM6 - Check For Voltage At ACC/S Input to Processor
- KM7 - Check WAC Relay
- KM15 - No A/C Cutout At WOT: Enter Output State Check
- KM16 - Check For VPWR to Relay
- KM17 - Check For WAC Cycling
- KM18 - Check WAC Circuit Continuity
- KM19 - Check WAC Circuit For Short to Power
- KM30 - Cycle A/C Demand Switch
- KM31 - Check ACD Circuit Continuity
- KM35 - Check ACD Circuit For Short to Power
- KM40 - Check A/C Input
- KM41 - Check For Short to Power In Processor
- KM43 - Check A/C Input Circuitry
- KM44 - Check A/C Input Circuit
- KM50 - No A/C - Attempt to Generate Code 539
- KM51 - Check For B+ Voltage to A/C Relay
- KM52 - Check Power to Clutch Circuit Continuity
- KM53 - Check A/C Relay
- KM54 - Check A/C On Circuit Continuity
- KM60 - Check ACD Circuit Continuity to Low Pressure Switch
- KM61 - Measure Resistance of LP Switch
- KM62 - Check ACD Circuit Continuity From LP Switch to Processor
- KM70 - Service Code 539: Check A/C Input
- KM71 - Check Low Pressure Switch
- KM72 - Check ACD Circuit to Processor For Short to Ground
- KM80 - A/C Always On: Check Clutch Circuit For Short to Power
- KM81 - Check A/C Relay
- KM82 - Check A/C On Circuit For Shorts to Ground
- KN - Fuel Pressure Regulator Control Solenoid
- KN - Testing Notes
- KN - Testing Schematic
- KN1 - KOEO Service Code 554: Enter Output State Check
- KN2 - Fuel Pressure Regulator Solenoid Electrical Operation
- KN3 - Check Vacuum Between Fuel Regulator and FPRC Solenoid
- KN4 - Check Vacuum Signal Between FPRC Solenoid and Manifold
- KN5 - Check FPRC Solenoid
- KN6 - Check FPRC Circuit Continuity
- KN7 - Check FPRC Circuit For Short to Power and Ground
- M - Dynamic Response Test
- ML - Self-Test Output/Malfunction Indicator Lamp
- ML - Testing Notes
- ML - Testing Schematic
- ML1 - Malfunction Indicator Light Always On
- ML4 - Malfunction Indicator Light Never On
- ML5 - Check For VBAT At MIL Fuse
- ML6 - Check For VBAT At MIL Bulb/Socket
- ML7 - Check MIL Bulb Response to Grounding
- ML8 - Check MIL Circuit Continuity
- ML10 - Malfunction Indicator Light Intermittent On
- ML15 - Malfunction Indicator Light Flashing with Erratic Idle
- ML20 - "Check Engine" Message Displayed
- ML25 - Continuous Code 529, "Check Engine"/"Check DCL"
- NA - TFI Ignition Diagnostic Monitor
- NA - Testing Notes
- NA - Testing Schematic
- NA1 - Continuous Codes 14/211: Erratic Ignition
- NA2 - Continuous Codes 18/212: Check IDM Circuit Continuity
- NA3 - Continuous Codes 18/212: Check IDM Circuit Continuity
- NA4 - Check IDM Circuit For Shorts to Power (Excluding VREF)
- NA5 - Check IDM Circuit For Shorts to VREF and PIP
- NA6 - Check IDM Circuit For Short to Ground
- NA7 - Check TFI Module
- NA8 - Check EEC-IV Harness
- NA9 - Check Processor and Harness Connectors
- NA10 - Check Processor For Short to Power
- NA11 - Check Processor For Short to Ground
- PA - Spark Timing Check - TFI
- QA - No Codes/Codes Not Listed
- QA - Test Schematic
- QA - Testing Notes
- QA1 - Check VREF Voltage At Self-Test Connector
- QA2 - Check SIG RTN Circuit Continuity
- QA3 - Check STI Circuit Continuity
- QA4 - Check STO Circuit Continuity
- QA5 - Check HEGO Signal For Short to Power
- QA6 - Isolate Short to Harness or HEGO Sensor
- QA7 - Check STO Circuit For Short to Ground
- QA8 - Check If Power Relay Is Always On
- QA9 - Check VPWR Circuit For Short to Power
- QA10 - Check MIL Function
- QB - Continuous Memory Service Code 15/512
- QC - Output State Check Not Functioning
- S - System Check
- TA - Neutral Drive Input
- TB - 4X4 Low/Overdrive Cancel Switch
- TB - Testing Notes
- TB - Testing Schematic
- TB1 - Verify Vehicle Self-Test State
- TB2 - Cycle the Appropriate Circuit
- TB3 - Check Harness Circuit For Short to Ground
- TB4 - Check Key Power Through OCIL Circuit
- TB5 - Check Output Driver Signal
- TB6 - Check Continuity of 4X4 Low or OD Cancel Switch Harness
- TB7 - Check Harness Circuit For Shorts to Power
- TC - Transmission Solenoids
- TC - Testing Notes
- TC - Testing Schematic
- TC1 - Enter Output State Check
- TC2 - Check Solenoid Electrical Operation
- TC3 - Check Continuity of Solenoid Signal and VPWR Harness
- TC4 - Check Solenoid Harness For Shorts to Power or Ground
- TC10 - Check VPWR to Solenoid
- TC11 - Check Solenoid Resistance
- TC12 - Check Continuity of Solenoid Signal & VPWR Harness
- TC13 - Check Harness For Short to Power or Ground
- TC20 - Key On Engine Off Service Code 621/622/641/643
- TC21 - Check Shift Solenoid Circuit For Short to Power
- TC22 - Check Shift Solenoid Circuit For Short to Ground
- TC23 - Check Shift Solenoid Circuit Continuity
- TC24 - Check Shift Solenoid For Short to Power In Transmission
- TC25 - Inspect Transmission Wiring
- TC30 - Continuous Codes 621/622/641/643
- TC31 - Check Harness and Connectors For Opens or Shorts
- TC32 - Check Harness For Intermittent Shorts to Ground
- TD - Manual Lever Position (MLP) Sensor
- TD - Testing Notes
- TD - Testing Schematic
- TD1 - Key On Engine Off Service Code 67/634, 522 and 654
- TD2 - Check Continuity of MLP Sensor Harness Circuits
- TD3 - Check MLP Sensor Circuit For Short to Power and Ground
- TD4 - Check MLP Sensor Resistance
- TD7 - Incorrect Shift/Lack of Shift Preliminary Checks
- TD8 - Check EEC-IV Harness Between EEC-IV and Transmission
- TD9 - Check If Symptom Can Be Reproduced Consistently
- TD10 - Service Code 634: Clear and Attempt to Re-Generate Code
- TD11 - Check For IGN Start/Run Circuit Voltage At Transmission
- TD12 - Check Function of the Transmission Select Switches
- TD13 - Check Transmission Switch Input Voltages At Breakout Box
- TD14 - Check Adjustment/External Wiring of the Manual Lever
- TD20 - Wiggle Harness and Connectors Recheck For Code 634
- TD21 - Inspect Connectors, Wire Routing, ECT
- TD22 - Road Test
- TD25 - Check Harness and Connectors For Intermittent Open/Short
- TE - Transmission Oil Temperature Sensor
- TE - Sensor Data
- TE - Testing Notes
- TE - Testing Schematic
- TE1 - KOEO and KOER Service Code 26 or 636
- TE2 - Check For VREF At Throttle Position Sensor
- TE3 - Check TOT Sensor Resistance Change As Oil Temp Varies
- TE10 - KOEO Service Code 56 or 637
- TE11 - Check Continuity of TOT and SIG RTN Circuits
- TE12 - Check TOT Circuit For Short to VPWR
- TE20 - KOEO Service Code 66 or 638
- TE21 - Check VREF At the Throttle Position Sensor
- TE22 - Check TOT Circuit For Short to Ground
- TE25 - Check Transmission Wiring
- TE90 - Continuous Code 637/638
- TF - Transmission Speed Sensor
- TF - Testing Notes
- TF - Testing Schematic
- TF1 - Engine Running Code 639
- TF2 - Check TSS/OSS Harness Circuit For Short to Power/Ground
- TF3 - Check TSS or OSS Resistance
- TF10 - Engine Running Service Code 639
- TF11 - Check TSS Circuits For Short to Power
- TF12 - Check TSS Circuit For Short to Ground or Each Other
- TF13 - Check TSS Circuit Continuity
- TF14 - Check Processor For Internal Shorts
- TF15 - Check TSS Output
- TF90 - Continuous Code 639
- TF91 - Check TSS or OSS Circuit Continuity
- TF92 - Check TSS or OSS Circuit For Short to Power or Ground
- TF93 - Check TSS or OSS Resistance
- TF95 - Continuous Code 639: Check TSS Wiring
- TF96 - Check Processor and Harness Connectors
- TF97 - Road Test
- TG - Electronic Transmission - Continuous Memory Service Codes
- X - Integrated Relay Control Module
- X - Testing Notes
- X - Testing Schematic
- X1 - Check Battery Voltage
- X2 - Check Battery Ground
- X3 - Ground Fault Isolation
- X4 - Processor Ground Fault Isolation
- X5 - Check Continuity of Signal Return Circuit
- X6 - Measure Voltage and Ground to IRCM
- X7 - Check Key Power to IRCM
- X8 - Check VPWR Circuit Continuity
- X9 - Measure Continuity of Power Ground to IRCM
- X12 - Service Code 556 or 557
- X13 - Check Fuel Pump Circuit For Shorts to Power/Ground
- X14 - Check Fuel Pump Relay Coil Resistance
- X15 - Check Voltage to Fuel Pump Relay
- X18 - No Engine Cooling Fan: Check Power Supply to IRCM
- X19 - Check Fan Motor Operation
- X20 - Check Fan Motor Operation
- X21 - Measure Battery Voltage Supply At Fan - Bypassing IRCM
- X22 - Verify Cooling Fan Ground
- X23 - Measure Battery Voltage Supply At Fan - Bypassing IRCM
- X25 - Check Fan Running Mode (Low)
- X26 - Jumper High Electro-Drive Fan Signal to Ground
- X27 - Check ECT Sensor
- X30 - Service Code 563: Check HEDF Relay Resistance
- X31 - Check HEDF Circuit Continuity
- X32 - Check HEDF Circuit For Shorts to Ground
- X33 - Check HEDF Circuit For Short to Power
- X35 - Low Speed Fan Always On: Check EDF Circuit Continuity
- X36 - Check EDF Circuit For Short to Power
- X37 - EDF Circuit Fault Isolation
- X40 - High Speed Cooling Fan Always On
- X41 - Check Processor For Short to Ground
- X42 - Check HEDF Circuit For Short to Ground
- X50 - A/C Not Functioning: Check For Voltage At A/C Clutch
- X51 - Check For Continuity From IRCM to A/C Clutch
- X52 - Check For Voltage to Processor
- X53 - Check Continuity of ACCS Circuit to IRCM
- X54 - Check Voltage to Cyclic Pressure Switch
- X55 - Check WAC Circuit For Shorts to Ground
- X56 - No A/C Cutoff
- X57 - Check WAC Circuit For Shorts to Power
- X58 - Isolate Fault to Processor or IRCM
- X80 - Service Code 564: Check EDF Signal For Short to Ground
- X81 - Check Fan Running Mode
- X82 - Fan Always On With Code 564
- X83 - Check EDF Circuit For Shorts to Power
- X84 - EDF Circuit Fault Isolation Check
- X90 - Service Code 542: Check Inertia Switch
- X91 - Service Code 542: Verify That Fuel Pump Is Off
- X92 - Check For Fuel Pump Relay Always On
- X93 - Check FPM Circuit Continuity
- X94 - Check For Continuity Between FPM Circuit and Ground
- X95 - Check Front Left HEGO For Short to Power
- X96 - Check HEGO Circuit For Short to Power
- X100 - Service Code 543: Check Power-to-Pump Circuit Continuity
- X101 - Check Fuel Pump Operation
- X102 - Service Code 524: Measure Low Fuel Pump Relay Continuity
- X103 - Check Power to IRCM
- X105 - Continuous Code 542: Check EEC-IV Harness
- X106 - Check FPM Circuit
- X110 - Continuous Code 524 or 543
- X111 - Check EEC-IV Harness
- X112 - Continuous Code 557 or 556: Check EEC-IV Harness
- AA - No Start Test
- Component Tests and General Diagnostics
- Locations
- Service and Repair
Diagrams- Specifications
- Technical Service Bulletins
Tools and Equipment
- Emission Control Systems
- Air Injection
- Air Injection Vacuum Control Solenoid Valve
- Air Injection Check Valve
- Air Injection Pump
- Air Injection Pump Pulley
- Vacuum Check Valve
- Vacuum Delay Valve
- Testing and Inspection
- Diagnosis By Symptom
- Secondary Air Injection System Noise Test
- TS1 - Visual Inspection of Silencer/Filter
- TS2 - Check For Obstructions
- TS3 - Check Belt Tension
- TS4 - Check Air Pump Operations
- TS5 - Check Silencer/Filter For Obstructions
- TS6 - Check Air Pump Resonator
- TS7 - Check For Vacuum at the Air Bypass Valve
- TS8 - Inspect Air Bypass Valve
- TS9 - Check Bypass Valve Diaphragm
- TS10 - Check Air Bypass Operation/Flow
- TS11 - Check Air Bypass Operation/Dump
- TS12 - Visually Inspect Air Supply Control Valve
- TS13 - Check For Vacuum at Air Control Valve
- TS14 - Check For Vacuum to Drop
- TS15 - Check Air Control Valve Diaphragm
- TS16 - Check For Air Supply at Valve
- TS17 - Check For Air at Outlet A
- TS18 - Check For Air at Outlet B
- TS19 - Visually Inspect Combination Air Control Valve
- TS20 - Check Combination Air Control Valve
- TS21 - Check For Manifold Vacuum
- TS22 - Check Combination Air Control Valve Operation
- TS23 - Check Combination Air Control Valve Operation
- TS24 - Visually Inspect Check Valve System (Externally)
- TS25 - Visually Inspect Hoses at Valves (Internally)
- TS26 - Inspect Check Valve Function
- TS27 - Check Thermactor Air Control Solenoid
- TS28 - Check Thermactor Diverter Solenoid
- TS29 - Check Vacuum Reservoir For Vacuum
- TS30 - Check Reservoir to Hold Vacuum
- TS31 - Check Vacuum Reservoir to Hold Vacuum
- TS32 - Check Vacuum Reservoir Function
- TS33 - Check Air Flow at Check Valve
- TS34 - Verify Check Valves Ability to Hold Vacuum
- TS35 - Visually Inspect Pulse Air Check Valve System (External)
- TS36 - Visually Inspect Hoses at Valves (Internally)
- TS37 - Inspect For Valve Function
- TS38 - Check Control Valve Operation For Open
- TS39 - Check Control Valve Operation For Closed
- TS40 - Check For Vacuum at Control Valve
- TS41 - Check For Vacuum Control Valve Function
- TS42 - Check For Blockage
- Catalytic Converter
- Evaporative Emissions System
- Exhaust Gas Recirculation
- Fillpipe Restrictor
- Positive Crankcase Ventilation
- Sensors and Switches - Emission Control Systems
- Thermostatic Air Cleaner
- Vacuum Restrictor
- Service Precautions
- Application and ID
- Description and Operation
- Testing and Inspection
- Flow of Diagnosis
- Symptom Related Diagnostic Procedures
- Component Tests and General Diagnostics
- Locations
- Diagrams
- Technical Service Bulletins
- Air Injection
- Fuel Delivery and Air Induction
- Fuel Pressure
- Fuel Pressure Release
- Idle Speed
- Air Cleaner Housing
- Air Flow Meter/Sensor
- Auxiliary Air Valve (Idle Speed)
- Fillpipe Restrictor
- Fuel
- Fuel Filler Cap
- Fuel Filter
- Fuel Injector
- Fuel Line Coupler
- Fuel Pressure Regulator
- Fuel Pump
- Fuel Rail
- Fuel Supply Line
- Fuel Tank
- Idle Speed/Throttle Actuator - Electronic
- Inertia Fuel Shutoff Switch
- Intake Air Heater
- Integrated Control Relay Module
- Main Relay (Computer/Fuel System)
- Relays and Modules - Fuel Delivery and Air Induction
- Sensors and Switches - Fuel Delivery and Air Induction
- Throttle Body
- Throttle Cable/Linkage
- Throttle Full Open Switch
- Throttle Position Sensor
- Service Precautions
- Testing and Inspection
- Symptom Related Diagnostic Procedures
- Diagnostic Notes
- Cranks Normally But Slow to Start
- Cranks Normally But Won't Start
- Detonation/Spark Knock
- Engine Failure or Reduced Performance
- Excessive Emissions or Odors
- Hesitates or Stalls On Acceleration
- High Oil Consumption
- Lack of Power, Sluggish
- Misses Under Load
- Poor Fuel Economy
- Rough, Unstable or Incorrect Idle; Stalling
- Pinpoint Tests
- EFD - Fuel Delivery Diagnosis
- EFD1 - System Integrity Check
- EFD2 - Fuel Pressure Test
- EFD3 - Check Fuel Pressure Leak-down
- EFD4 - Check Pressure Regulator Diaphragm Condition
- EFD5 - Check Fuel Pressure With Engine Load
- EFD6 - Check Fuel Pressure Regulator
- EFD7 - Check Vacuum Supply
- EFD8 - Check Voltage at Inertia Switch
- EFD9 - Check Voltage At Integrated Relay Control Module
- EFD10 - Check For Voltage to Integrated Relay Control Module
- EFD11 - Check Fuel Pump Resistance
- EFD12 - Check For Voltage At Fuel Pump Relay
- EFD13 - Check Power Supply to Fuel Pump Relay
- EFD14 - Check Fuel Pump Relay Operation
- EFD15 - Check Fuel Pump Operation, Audible
- EFD16 - Check Voltage Supply to Selector Switch
- EFD17 - Check Voltage At Selector Switch
- EFD18 - Check Voltage to Pump
- EFD19 - Check Fuel Pump Ground
- EFD20 - Check Fuel Pump Resistance
- EFD21 - Check Fuel Filter Condition
- EFD22 - Check Rear Tank Fuel Delivery Module
- EFD23 - Check Front Tank Fuel Delivery Module
- EFD24 - Check Pressure Regulator Valve Seat Leakage
- EFD25 - Check Regulator For High Pressure Causes
- EFD26 - Check Fuel Return System For High Pressure Causes
- EFD27 - Check Fuel Return System
- EFD28 - Check Fuel Injector Function
- EFD29 - Check Fuel Injector Resistance
- EFD30 - Check Fuel Injector Electrical Continuity Signal
- EFD31 - Check Fuel Injector Flow and Leakage
- IA - Inlet Air Control System
- EFD - Fuel Delivery Diagnosis
- Component Tests and General Diagnostics
- Symptom Related Diagnostic Procedures
- Locations
- Service and Repair
- Diagrams
- Technical Service Bulletins
- Ignition System
- Firing Order
- Ignition Timing
- Calibration Resistor / Connector
- Camshaft Position Sensor
- Crankshaft Position Sensor
- Distributor
- Hall Effect Sensor
- Ignition Cable
- Ignition Coil
- Ignition Control Module
- Ignition Timing Connector
- Knock Sensor
- Relays and Modules - Ignition System
- Sensors and Switches - Ignition System
- Spark Plug
- Vacuum Restrictor
- Service Precautions
- Application and ID
- Description and Operation
- Testing and Inspection
- Flow of Diagnosis
- Symptom Related Diagnostic Procedures
- Pinpoint Tests
- AA - No Start
- AA1 - Were Tests In EEC-IV Quick Test Completed
- AA2 - Check For Good Battery
- AA3 - Check For Spark At Coil During Crank
- AA4 - Check For TFI Power
- AA5 - Check For PIP Signal
- AA6 - Check For Spout Signal
- AA7 - Check VBAT At Coil
- AA8 - Check For Coil- Signal
- AA9 - Check For Spark At All Wires
- AA10 - Check Plugs
- AA11 - Check For PIP Power At PIP Sensor
- AA12 - Check For PIP From PIP Sensor
- AA13 - Check For PIP With TFI Disconnected
- AA14 - Check PIP With EEC Processor Disconnected
- AA15 - Check PIP A to EEC Processor For Short High
- AA16 - Check PIP B to TFI For Short High
- AA17 - Check PIP In Harness For Short Low
- AA18 - Check For Spout In Harness
- AA19 - Check For Spout High
- AA20 - Check For Spout Short High In Harness
- AA21 - Check For Spout Short Low
- AA22 - Check For Spout Short Low In Harness
- AA23 - Check For PIP Open In Harness
- AA24 - Check IGN GND At EEC Processor
- AA25 - Check For IGN GND At PIP Sensor
- AA26 - Check PIP At PIP Sensor
- AA27 - Check For Coil- Open In Harness
- AA28 - Check For Coil- Short Low In Harness
- AA29 - Check For Coil- Short High In Harness
- AA30 - Check GND At TFI Module
- AA31 - Check GND At PIP Sensor
- AAA - No Start
- B - IDM Missing Code 18C or 212C
- C - Code 18R or 213 - Spout Open; Poor Economy, Driveability
- D - Intermittent Diagnosis
- AA - No Start
- Component Tests and General Diagnostics
- Oscilloscope Patterns and Waveforms
- Locations
- Diagrams
- Technical Service Bulletins
- Tools and Equipment
- Transmission Control Systems
- Application and ID
- Description and Operation
- Locations
- Diagrams
- Technical Service Bulletins
- Transmission and Drivetrain
- Actuators and Solenoids - Transmission and Drivetrain
- Automatic Transmission/Transaxle
- Actuators and Solenoids - A/T
- Accumulator
- Band
- Band Apply Servo
- Case
- Clutch
- Differential
- Drive Chain
- Fluid - A/T
- Fluid Filter - A/T
- Fluid Line/Hose
- Fluid Pan
- Fluid Pump
- Fluid Transfer Tube
- Governor
- Overdrive Assembly
- Parking Pawl
- Planetary Gears
- Seals and Gaskets
- Sensors and Switches - A/T
- Shift Interlock
- Shift Linkage
- Sun Gear
- Throttle Valve Cable/Linkage
- Torque Converter
- Torque Converter Clutch Solenoid
- Transmission Cooler
- Transmission Mode Switch
- Transmission Position Sensor/Switch
- Transmission Speed Sensor
- Turbine Shaft
- Valve Body
- Application and ID
- Description and Operation
- Testing and Inspection
- Symptom Related Diagnostic Procedures
- Engagement Concerns
- Shift Concerns
- Harsh Neutral to Reverse or Harsh Neutral to Drive
- No Manual 2ND Gear
- No 1-2 Shift (Automatic)
- No 2-3 Shift (Automatic)
- No 3-4 Shift (Automatic)
- 1-2 Shift Feels Harsh or Soft
- 1-2 Shift Speed High or Low
- 2-3 or 3-1 Downshift Harsh
- 2-3 Shift Feels Harsh or Soft
- 2-3 Shift Speed High or Low
- 3-2 Downshift Harsh
- 3-4 Shift Feels Harsh or Soft
- 3-4 Shift Speed High or Low
- 4-3 Downshift Harsh
- Torque Converter Clutch Operation Concerns
- Other Concerns
- Component Tests and General Diagnostics
- Symptom Related Diagnostic Procedures
- Service and Repair
- Specifications
- Technical Service Bulletins
- Differential Assembly
- Drive Axles, Bearings and Joints
- Flex Plate
- Manual Transmission/Transaxle
- Sensors and Switches - Transmission and Drivetrain
- Transmission Control Systems
- Testing and Inspection
- Technical Service Bulletins
- Tools and Equipment
- Brakes and Traction Control
- Antilock Brakes / Traction Control Systems
- ABS Main Relay
- Brake Fluid Pump Relay
- Braking Sensor/Switch
- Diagnostic Connector - ABS
- Electronic Brake Control Module
- Hydraulic Control Assembly - Antilock Brakes
- Wheel Speed Sensor
- Description and Operation
- Testing and Inspection
- Initial Inspection and Diagnostic Overview
- Reading and Clearing Diagnostic Trouble Codes
- Symptom Related Diagnostic Procedures
- Pinpoint Tests
- A Warning Indicator ON/Brake Warning OFF)
- AA Anti-Lock Brake Control Module
- B ABS Warning Indicator on (Brake Indicator Off)
- BB Solenoid Valve Diagnosis
- C Indicator ON or False Cycling
- CC DTC 31, 35, 41, 55 or 75 LH ABS Brake Sensor and Circuit
- D Antilock Warning Lamp Sequence Normal
- DD Wheel Sensor Diagnosis
- E Antilock Warning Lamp Sequence Normal
- EE Fluid Level Indicator/Pedal Travel Switch/Pressure Switch
- F Brake Lamp ON (Antilock Lamp OFF, Parking Brake OFF)
- G No Warning Lamp On When Ignition Switch Turned On
- H Spongy Brake Pedal With/Without Antilock Function
- J Poor Tracking During ABS Function
- Pinout Values and Diagnostic Parameters
- Locations
- Diagrams
- Technical Service Bulletins
- Tools and Equipment
- Brake Bleeding
- Brake Pedal Assy
- Brake Warning Indicator
- Disc Brake System
- Drum Brake System
- Hydraulic System
- Parking Brake System
- Power Brake Assist
- Relays and Modules - Brakes and Traction Control
- Sensors and Switches - Brakes and Traction Control
- Service Precautions
- Description and Operation
- Testing and Inspection
Adjustments- Technical Service Bulletins
- Antilock Brakes / Traction Control Systems
- Starting and Charging
- Sensors and Switches - Starting and Charging
- Relays and Modules - Starting and Charging
- Charging System
- Starting System
- Power and Ground Distribution
- Technical Service Bulletins
- Power and Ground Distribution
- Steering and Suspension
- Alignment
- Relays and Modules - Steering and Suspension
- Sensors and Switches - Steering and Suspension
- Steering
- Power Steering
- Relays and Modules - Steering
- Sensors and Switches - Steering
- Steering Angle Sensor
- Steering Column
- Steering Gear
- Steering Shaft
- Steering Wheel
- Tie Rod
- Description and Operation
- Testing and Inspection
- Diagnosis By Symptom
- System Pressure Test
- External Leaks
- Variable Assist Power Steering (VAPS)
- Testing Notes
- Troubleshooting Hints
- Pinpoint Tests
- A1 - Module Check
- A2 - Module Check
- A3 - Fuse Check
- A4 - Test Drive Vehicle
- A5 - Speedometer Check
- A6 - Speed Sensor Circuit Check
- A7 - Actuator (Electrical) Check
- A8 - Harness Voltage at Actuator Connector
- A9 - Actuator (Mechanical) Check
- A10 - Actuator (Electrical) Check
- A11 - Continuity Check
- A12 - VAPS Harness and Connectors Check
- A13 - VAPS Harness and Connectors Check
- A14 - VAPS Harness and Connectors Check
- A15 - Actuator (Electrical) Check
- A16 - VAPS Harness and Connectors Check
- A17 - VAPS Harness and Connectors Check
- A18 - Continuity Check
- A19 - VAPS Harness and Connectors Check (VIP Pin)
- A20 - Harness and Connector Check (Diagnostic Connector)
- Service and Repair
- Diagrams
- Specifications
- Technical Service Bulletins
- Suspension
- Ball Joint
- Control Arm
- Cross-Member
- Radius Arm
- Relays and Modules - Suspension
- Sensors and Switches - Suspension
- Spindle
- Stabilizer Bar
- Subframe
- Suspension Control ( Automatic - Electronic )
- Air Dryer
- Air Spring
- Compressor/Pump
- Compressor/Pump Relay
- Damping Control Actuator
- Diagnostic Connector
- Level Control Solenoid Valve
- Ride Height Sensor
- Suspension Control Module
- Suspension Main Relay
- Suspension Mode Switch
- Vehicle Speed Sensor Signal
- Description and Operation
- Testing and Inspection
- Adjustments
- Locations
- Diagrams
- Specifications
- Technical Service Bulletins
- Suspension Spring ( Coil / Leaf )
- Suspension Strut / Shock Absorber
- Wheel Bearing
- Service Precautions
- Description and Operation
- Technical Service Bulletins
- Wheels and Tires
- Specifications
- Technical Service Bulletins
- Heating and Air Conditioning
- Accumulator HVAC
- Air Door
- Air Duct
- Air Register
- Ambient Temperature Sensor / Switch HVAC
- Blower Motor
- Blower Override Switch
- Cabin Temperature Sensor / Switch
- Compressor HVAC
- Compressor Clutch Relay
- Condenser HVAC
- Control Assembly
- Control Module HVAC
- Coupler HVAC
- Evaporator Case
- Evaporator Core
- Expansion Block/Orifice Tube
- Heater Core
- Heater Core Temperature Sensor / Switch
- High Pressure Safety Valve HVAC
- Hose/Line HVAC
- Housing Assembly HVAC
- Receiver Dryer
- Refrigerant
- Refrigerant Filter
- Refrigerant Oil
- Refrigerant Pressure Sensor / Switch
- Relays and Modules - HVAC
- Sensors and Switches - HVAC
- Service Port HVAC
- Solar Sensor
- Vacuum Harness HVAC
- Vacuum Reservoir HVAC
- Service Precautions
- Description and Operation
- Testing and Inspection
- Locations
- Service and Repair
- Retrofitting
- A/C System Flushing
- Evacuation
- Evacuation and Charging
- Manifold Gauge Set Connection
- Oil Charge
- Oil Level Check
- Refrigerant Recovery
- System Check
- System Pressure Readings
- Diagrams
- Specifications
- Technical Service Bulletins
- Restraints and Safety Systems
- Air Bag Systems
- Air Bag(s) Arming and Disarming
- Air Bag
- Air Bag Control Module
- Clockspring Assembly / Spiral Cable
- Impact Sensor
- Safing Sensor
- Side Air Bag
- Standby Power Supply
- Malfunction Lamp / Indicator
- Service Precautions
- Description and Operation
- Testing and Inspection
- Initial Inspection and Diagnostic Overview
- Reading and Clearing Diagnostic Trouble Codes
- Diagnostic Trouble Code Tests and Associated Procedures
- Pinpoint Tests
- Glossary Of Terms Used In Pinpoint Tests
- A - Airbag Indicator Does Not Illuminate
- B: The Air Bag Warning Indicator Is Illuminated Continuously
- C - Loss of Battery Power
- D - Circuit Shorted to Ground
- E - Crash Sensor Shorted to Ground
- F - Lefthand Safing Sensor Not Mounted Correctly
- G - Safing Sensor Shorted or Closed
- H - Safing Sensor Diagnostic Circuit Open
- I - Safing Sensor Diagnostic Circuit Open
- J - High Resistance/Open In Driver Airbag Circuit
- K - High Resistance/Open Passenger Airbag Circuit
- L - Low Resistance In Drivers Airbag Circuit
- M - Low Resistance In Passenger Airbag Circuit
- N - Open Connection In Front Right Crash Sensor
- O - Open Connection In Front LH Crash Sensor
- P - F/R Crash Sensor Not Mounted Correctly
- Q - Front Left Crash Sensor Not Mounted Correctly
- R - Diagnostic Monitor Internal Thermal Fuse Open
- S - Backup Power Supply Malfunction
- T - Diagnostic Monitor Internal Malfunction
- Air Bag Systems