A L L Diagnostic Trouble Codes ( DTC )
Testing and Inspection- Diagnostic Trouble Code Descriptions
- Manufacturer Code Charts
- Code to Test Chart
- Driveability (DR) Tests
- Diagnostic Notes (Read Before Proceding)
- DR-1A CODE to DR TEST Chart (Checking for Fault Codes)
- DR-1B Output Circuits of ECM Controlled Components
- DR-2A Fault Code 11-Oxygen Solenoid Circuit
- DR-2B Oxygen Solenoid Control Circuit
- DR-2C Oxygen Solenoid Control Circuit
- DR-2D Supply Voltage to Oxygen Solenoid
- DR-3A Fault Code 13-Air Switching Solenoid
- DR-3B Air Switching Solenoid Control Circuit
- DR-3C Air Switching Purge Solenoid
- DR-4A Fault Code 17-Throttle Control Solenoid Circuit
- DR-4B Throttle Control Solenoid Circuit
- DR-5A Fault Code 18-EGR Control Solenoid Circuit
- DR-5B EGR Control Solenoid Control Circuit
- DR-5C Checking EGR Solenoid
- DR-6A Fault Code 22-Oxygen Feedback System
- DR-6B Checking Oxygen Sensor
- DR-6C Oxygen Feedback System For A Rich Condition
- DR-6D Oxygen Feedback System For A Lean Condition
- DR-6E Oxygen Sensor Circuit to Computer
- DR-7A Fault Code 25-Charge Temperature Switch
- DR-7B Charge Temperature Switch Ground Wire
- DR-7C Charge Temperature Switch Control Wire
- DR-7D Fault Code 26-Engine Temperature Sensor
- DR-7E Engine Temperature Sensor Wire
- DR-8A Fault Code 28-Speed Sensor Circuit
- DR-8B Speed Sensor Circuit
- DR-8C Speed Sensor Wire to Computer
- DR-9A Checking For No Code 88
- DR-9B Checking For No Code 88
- DR-9C Checking For No Code 88
- DR-10A Choke & Fast Idle Cam Linkage
- DR-11A Checking Choke Vacuum Kick
- DR-12A Heated Air Intake System
- DR-13A Engine Coolant Sensor Calibration
- DR-14A Canister Purge CVSCC Valve
- DR-15A Check Choke Position Engine Running
- DR-15B Checking Choke Control
- DR-15C Checking Choke Heater
- DR-15D Voltage to Choke Control
- DR-15E Voltage to Oil Pressure Switch
- DR-15F Wire to Oil Pressure Switch
- DR-15G Vacuum Supply to Choke Vacuum Kick Diaphragm
- DR-16A Checking For Fuel Fouled Spark Plugs
- DR-17A Checking Carburetor Switch
- DR-18A Engine Temperature Sensor Calibration
- DR-19A Checking Choke Position
- DR-19B Checking Choke Control
- DR-19C Checking Choke Heater
- DR-19D Voltage to Choke Control
- DR-19E Voltage to Oil Pressure Switch
- DR-19F Wire to Oil Pressure Switch
- DR-20A Checking EGR System
- DR-20B Vacuum Supply to the EGR Valve
- DR-20C Vacuum Supply to EGR Valve
- DR-20D EGR Vacuum Supply
- DR-20E Vacuum to EGR Amplifier
- DR-20F Vacuum to EGR Amplifier
- DR-21A Canister Purge System CVSCC Valve
- DR-22A Air Switching System
- DR-22B Checking Air Supply
- DR-22C Vacuum to Air Switching Valve
- DR-23A Heated Air Intake System
- DR-24A Bowl Vent System
- DR-24B Checking Bowl Vent System
- DR-24C Checking Bowl Vent System
- DR-24D Checking Bowl Vent System
- DR-24E Voltage to Bowl Vent Solenoid
- DR-25A Checking Start to Run Transfer
- DR-25B Run Pickup Coil Circuit
- DR-25C Checking Pickup Air Gap
- DR-25D Run Pickup Coil
- DR-26A Idle Control Solenoid During Hot Restart
- DR-26B Idle Control Solenoid Operation With A/C on
- DR-26C A/C Input Signal to Computer
- DR-26D A/C Input Signal to Computer
- DR-27A Secondary Ignition System
- DR-28A Basic Ignition Timing
- DR-28B Ignition Spark Advance
- DR-28C Vacuum Supply to Computer
- DR-29A Checking Idle RPM
- DR-29B Checking Propane RPM
- DR-29C Fast Idle RPM
- DR-29D Idle Solenoid RPM
- DR-30 Driveability Problems Not Related to Engine Controls