NO.6 CRANKS NORMALLY BUT WILL NOT START [MZI-3.7]

id0103d2801200

6

CRANKS NORMALLY BUT WILL NOT START
DESCRIPTION
•  The starter cranks engine at normal speed but the engine will not run.
•  Refer to symptom troubleshooting “No.5 Engine stalls” if this symptom appears after engine stall.
•  Fuel is in tank.
•  Battery is in normal condition.
POSSIBLE CAUSE
•  No battery power supply to PCM
•  Air leakage from intake-air system
•  Open PCM GND or vehicle body GND
•  Improper operation of electronic throttle control system
•  No signal from CKP sensor due to sensor, related wire or incorrect installation
•  No signal from CMP sensor due to sensor, related wire or incorrect installation
•  Low engine compression
•  Engine overheating
•  Vacuum leakage
•  Erratic signal to ignition coil
•  Improper air/fuel mixture ratio control
•  Poor fuel quality
•  PCV valve malfunction
•  Restriction in intake-air system
•  Restriction in exhaust system
•  Disconnected electrical connector
•  Open or short circuit in fuel pump body and related wiring harness
•  Inadequate fuel pressure
•  Fuel pump mechanical malfunction
•  Fuel leakage from injector
•  Fuel injector is clogged.
•  Purge solenoid valve malfunction
•  Spark plug malfunction
•  Ignition coil malfunction
•  Improper variable valve timing control system operation
•  Improper valve timing
•  Immobilizer system and/or circuit malfunction
•  Immobilizer system operating properly. (Ignition key is not registered.)
•  Pressure regulator malfunction (built-in fuel pump unit)
Warning
The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system:
•  Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
•  Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE SERVICE PRECAUTION” and “AFTER SERVICE PRECAUTION” described in this manual.
Caution
•  Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

Diagnostic procedure

STEP

INSPECTION

RESULTS

ACTION
1
Connect the M-MDS to the DLC-2.
Do any of the following conditions appear?
•  Engine does not completely start.
•  DTC P1260 is displayed.
Yes
Both conditions appear:
Go to Step 3.
No
Either or other condition appears:
Go to the next step.
2
Does engine stall after approx. 2 s from when it is started?
Yes
Go to the next step.
No
Immobilizer system is normal.
Go to Step 8.
3
Is the coil connector securely connected to the coil?
Yes
Go to the next step.
No
Connect the coil connector securely.
Return to Step 2.
4
Does the security light flush?
Yes
Go to the next step.
No
Inspect and repair or replace the following:
•  Wiring harnesses and connectors from keyless control module terminal 3W and instrument cluster terminal 1W
•  Wiring harness and connectors from keyless control module terminal 3X and instrument cluster terminal 1X
•  Instrument cluster
(See INSTRUMENT CLUSTER INSPECTION.)
5
Connect the M-MDS to the DLC-2 and retrieve the DTC for PCM, instrument cluster and keyless control module (with advanced keyless entry system).
Are any of the following DTCs displayed?
DTC
PCM: B1342, U0073, U0155
Instrument cluster: B1213, B1600, B1601, B1602, B1681, B2103, B2139, B2431, U0100, U0214
Keyless control module (with advanced keyless entry system): B1681, B2103, B1213
Yes
Go to the appropriate DTC inspection.
(See DTC TABLE [MZI-3.7].)
No
Go to the next step.
6
Inspect the following wiring harnesses and connectors:
With advanced keyless entry system:
•  Between coil terminal A and keyless control module terminal 3V
•  Between coil terminal B and keyless control module terminal 3U
Without advanced keyless entry system:
•  Between coil terminal A and instrument cluster terminal 1G
•  Between coil terminal B and instrument cluster terminal 1E
Is there any malfunction?
Yes
Repair or replace the suspected wiring harness and connector.
No
Go to the next step. (with advanced keyless entry system.)
Go to Step 8. (without advanced keyless entry system.)
7
Inspect the following wiring harnesses and connectors for an open or short circuit:
•  Between keyless control module terminal 3W and instrument cluster terminal 1W
•  Between keyless control module terminal 3X and instrument cluster terminal 1X
Is there any malfunction?
Yes
Repair or replace wiring harness and connectors.
No
Go to the next step.
8
Inspect the following wiring harnesses and connectors:
•  Between PCM terminal 1BG and instrument cluster terminal 1W
•  Between PCM terminal 1BL and instrument cluster terminal 1X
Is there any malfunction?
Yes
Repair or replace the suspected wiring harness and connector.
No
Go to the next step.
9
Verify the following:
•  Vacuum connection
•  External fuel shut off or accessory (such as kill switch, alarm)
•  Fuel quality: proper octane, contamination, winter/summer blend
•  No air leakage from intake-air system
•  Intake-air system restriction (such as air cleaner element, fresh air duct)
•  Proper sealing of intake manifold and components attached to intake manifold
•  Ignition wiring
•  Electrical connections
•  Fuses
•  Smooth operation of throttle valve
Are all items normal?
Yes
Go to the next step.
No
Service if necessary.
Repeat Step 9.
10
Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
Yes
DTC is displayed:
•  Go to the appropriate DTC inspection.
Communication error message is displayed:
Inspect for the following:
•  Open circuit in wiring harness between main relay and PCM terminal 1BO or 1BJ
•  Open main relay GND circuit
•  Open or short circuit in wiring harness between the DLC-2 and PCM terminal 1BL or 1BG
•  Main relay is stuck open.
•  Open or poor GND circuit (PCM terminal 1D, 1J, 1BP, 1BK)
•  Poor connection of vehicle body GND
No
No DTC is displayed:
Go to the next step.
11
Connect the M-MDS to the DLC-2.
Access the APP1 and APP2, APP3 PIDs. Crank the engine with accelerator pedal released.
Are the APP1 and APP2, APP3 PIDs indicating that the accelerator pedal is in the released position?
Yes
Go to the next step.
No
Inspect for the following:
•  APP sensor
•  Wiring harnesses and connectors for following:
―  PCM terminal 1AC—APP sensor terminal B
―  PCM terminal 1AH—APP sensor terminal C
―  PCM terminal 1Y—APP sensor terminal D
―  PCM terminal 1AK—APP sensor terminal E
―  PCM terminal 1BA—APP sensor terminal F
―  PCM terminal 1AD—APP sensor terminal G
―  PCM terminal 1AG—APP sensor terminal H
12
Connect the M-MDS to the DLC-2.
Access the TP1, TP2 PID. Crank the engine with accelerator pedal released.
Are the TP1, TP2 PID indicates the closed throttle position?
Yes
Go to the next step.
No
Inspect for the following:
•  TP sensor
•  Wiring harnesses and connectors for following:
―  PCM terminal 2BO—TP sensor terminal A
―  PCM terminal 2BR—TP sensor terminal B
―  PCM terminal 2AD—TP sensor terminal C
―  PCM terminal 2D—TP sensor terminal D
―  PCM terminal 2AH—TP sensor terminal E
―  PCM terminal 2Z—TP sensor terminal F
13
Does the engine start with the throttle valve closed?
Yes
Go to Step 28.
No
Go to the next step.
14
Will the engine start and run smoothly at part throttle?
Yes
Inspect the electronic throttle control system operation.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZI-3.7].)
No
Go to the next step.
15
Connect the M-MDS to the DLC-2.
Access RPM PID.
Is RPM PID indicating the engine speed when cranking the engine?
Yes
Go to the next step.
No
Inspect for the following:
•  Open or short circuit in CKP sensor
•  Open or short circuit in wiring harness between CKP sensor terminal A and PCM terminal 2P
•  Open or short circuit in wiring harness between CKP sensor terminal B and PCM terminal 2T
•  Open or short circuit in CKP sensor wiring harnesses
If CKP sensor and wiring harness are normal, go to the next step.
16
Visually inspect the CKP sensor and teeth of crankshaft pulley.
Are CKP sensor and teeth of crankshaft pulley normal?
Yes
Go to the next step.
No
Replace the malfunctioning part.
17
Inspect the ignition coil related wiring harness condition (intermittent open or short circuit) for all cylinders. Are wiring harness conditions normal?
Yes
Go to the next step.
No
Repair the wiring harnesses.
18
Perform the spark test.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZI-3.7].)
Is strong blue spark visible at each cylinder?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to spark test result.
19
Inspect the spark plug conditions.
Is spark plug wet, covered with carbon or grayish white?
Yes
Spark plug is wet or covered with carbon:
Inspect for fuel leakage from injector.
Spark plug is grayish white:
Inspect the fuel injector for clogging.
No
Install the spark plugs on original cylinders.
Go to the next step.
20
Remove and shake the PCV valve.
Does the PCV valve rattle?
Yes
Go to the next step.
No
Replace the PCV valve.
21
visually inspect the exhaust system part.
Is there any deformed exhaust system part?
Yes
Replace the suspected part.
No
Go to the next step.
22
Inspect the fuel line pressure.
(See FUEL LINE PRESSURE INSPECTION [MZI-3.7].)
Is the fuel line pressure correct?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part.
23
Visually inspect the fuel injector O-ring and fuel line for fuel leakage.
Service if necessary.
Is the fuel line pressure held after the ignition switch is turned off?
(See FUEL LINE PRESSURE INSPECTION [MZI-3.7].)
Yes
Go to the next step.
No
Inspect the fuel injector.
If the fuel injector is normal, replace the fuel pump unit.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [MZI-3.7].)
24
Disconnect the vacuum hose between the purge solenoid valve and the intake manifold from purge solenoid valve side.
Plug opening end of vacuum hose.
Start the engine.
Is starting condition improved?
Yes
Inspect if the purge solenoid valve is stuck open mechanically.
Inspect the evaporative emission control system.
No
Go to the next step.
25
Is air leakage felt or heard at intake-air system components while racing engine to higher speed?
Yes
Repair or replace the malfunctioning part.
No
Go to the next step.
26
Inspect the variable valve timing control system operation.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZI-3.7].)
Does variable valve timing control function properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part.
27
Is the engine compression correct?
Yes
Inspect the valve timing.
No
Inspect for causes.
28
•  Verify test results.
―  If normal, return to diagnostic index to service any additional symptoms.
―  If malfunction remains, inspect related Service Information and perform repair or diagnosis.
•  If vehicle is repaired, troubleshooting completed.
•  If vehicle is not repaired or additional diagnostic information is not available, replace the PCM.