NO.5 CRANKS NORMALLY BUT WILL NOT START [F2]

id010394912500

5

CRANKS NORMALLY BUT WILL NOT START
DESCRIPTION
•  The starter cranks the engine at normal speed but the engine will not run.
•  Refer to symptom troubleshooting "No.5 Engine stalls" if this symptom appears after the engine stall.
•  Fuel is in the tank.
•  The battery is in normal condition.
POSSIBLE CAUSE
•  No battery power supply to PCM
•  Air leakage from intake-air system
•  Open PCM ground or vehicle body ground
•  Improper operation of IAC valve
•  No signal from CMP sensor due to sensor, related wire or incorrect installation
•  Low engine compression
•  Vacuum leakage
•  Spark leakage from high-tension leads
•  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 body mechanical malfunction
•  Fuel leakage from fuel injector
•  Fuel injector is clogged.
•  Purge solenoid valve malfunction
•  Pressure regulator malfunction
Warning
•  The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
―  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 the "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual.
Caution
•  If there is foreign material on the connecting area of the quick release connector, it might damage the connector or fuel pipe. To prevent this, disconnect the connector and clean the connecting area before connecting.

Diagnostic procedure

STEP

INSPECTION

RESULTS

ACTION
1
Verify the following:
•  Vacuum connection
•  External fuel shut off or accessory (such as kill switch, alarm etc.)
•  Fuel quality: proper octane, contamination, winter/summer blend
•  No air leakage from intake-air system
•  Proper sealing of the intake manifold and components attached to intake manifold: IAC valve
•  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 1.
2
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 appropriate the DTC inspection.
No
No DTC is displayed:
•  Inspect instrument cluster operation.
3
Turn the ignition switch to the ON position (Engine off).
Disconnect the TP sensor connector.
Measure the voltage between TP sensor connector VREF terminal with ignition switch on.
Voltage
4.5—5.5 V
Is voltage normal?
Yes
Go to the next step.
No
Go to symptom troubleshooting “No.27 constant voltage”.
4
Does the engine start with throttle closed?
Yes
Go to Step 18.
No
Go to the next step.
5
Will engine start and run smoothly at part throttle?
Yes
Inspect IAC valve and wiring harness.
No
Go to the next step.
6
Connect M-MDS to the DLC-2.
Access RPM PID.
Is RPM PID indicating engine speed when cranking engine.
Yes
Go to the next step.
No
Inspect for following:
•  Open or short circuit in CMP sensor.
•  Open or short circuit between CMP sensor and PCM terminal 2E.
•  Open or short circuit in CMP sensor wiring harnesses.
If CMP sensor and wiring harness are normal, go to the next step.
7
Visually inspect the CMP sensor.
Is CMP sensor normal.
Yes
Go to the next step.
No
Replace the malfunctioning part.
8
Inspect for cracks on high-tension leads.
Is there any cracks on high-tension leads?
Yes
Repair suspected high-tension leads.
No
Go to the next step.
9
Is strong blue spark visible at each disconnected high-tension lead while cranking engine.
Yes
Go to the next step.
No
Inspect for following:
•  Open or short circuit in ignition coil.
•  Open circuit in high-tension leads.
•  Open circuit between igniter connector ground terminal and body ground.
•  Open circuit between ignition switch and ignition coil.
•  Open circuit between ignition coil and condenser.
•  Open circuit between condenser and igniter.
•  Open circuit between ignition coil and igniter.
•  Open circuit between igniter and PCM terminal 2F.
10
Inspect the spark plug conditions.
Is the spark plug wet, covered with carbon or grayish white?
Yes
Spark plug is wet or covered with carbon:
Inspect for fuel leakage from the fuel injector.
Spark plug is grayish white:
Inspect for clogged the fuel injector.
No
Install the spark plugs on original cylinders.
Go to the next step.
11
Remove and shake the PCV valve.
Does the PCV valve rattle?
Yes
Go to the next step.
No
Replace the PCV valve.
12
Visually inspect the exhaust system part.
Is there any deformed exhaust system part?
Yes
Replace the suspected part.
No
Go to the next step.
13
Install fuel pressure gauge between fuel main pipe and the fuel distributor.
Connect the jumper wire between F/P terminal at DLC in engine compartment and ground.
Turn the ignition switch to the ON position (Engine off).
Is fuel line pressure correct when ignition switch is turned off?
(See FUEL PUMP UNIT INSPECTION [F2].)
Yes
Go to the next step.
No
Zero or low:
Inspect fuel pump circuit.
inspect for open fuel pump relief valve.
inspect for open fuel leakage inside pressure regulator.
inspect for main fuel line.
inspect for PRC solenoid, related vacuum hose, and
High:
Inspect pressure regulator for high pressure cause.
Inspect for clogged fuel return line.
14
Visually inspect for fuel leakage at the fuel injector O-ring and fuel line. Service if necessary.
Is the fuel line pressure held after ignition switch turned off.
(See FUEL PUMP UNIT INSPECTION [F2].)
Yes
Go to the next step.
No
Inspect the pressure regulator diaphragm condition.
•  If condition is normal, inspect the fuel injector.
•  If condition is not normal, replace the pressure regulator.
15
Disconnect the vacuum hose between the purge solenoid valve and the dynamic chamber from the purge solenoid valve side.
Plug the 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.
16
Is air leakage felt or heard at intake-air system components while the racing the engine to higher speed?
Yes
Repair or replace the malfunctioning part.
No
Go to the next step.
17
Is engine compression correct?
Yes
Inspect valve timing.
No
Inspect for cause.
18
•  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.