NO.5 CRANKS NORMALLY BUT WILL NOT START [WLT-1, WLT-2]

id010396912500

5
Cranks normally but will not start
DESCRIPTION
•  The starter cranks the engine at normal speed but the engine will not run.
•  Refer to “ENGINE STALLS” if this symptom appears after engine stall.
•  Fuel is in the tank.
•  The battery is in normal condition.
POSSIBLE CAUSE
•  Poor fuel quality
•  Intake-air system restriction
•  Fuel line restriction
•  EGR system malfunction
•  FCV malfunction
•  Fuel leakage
•  Fuel filter clogging
•  Incorrect fuel injection timing
•  Injection pump malfunction
•  Injection nozzle malfunction
•  Low engine compression

Diagnostic procedure

STEP

INSPECTION

ACTION
1
Note
•  The following test should be performed on vehicles with immobilizer system.
Go to next step for vehicles without immobilizer system.
Does immobilizer indicator light flash and indicate?
Yes
Go to “ON-BOARD DIAGNOSTIC FUNCTION” of immobilizer system.
No
Go to next step.
2
•  Inspector for following:
―  Fuel quality including water contamination
―  Fuel line restriction
―  Loose bands on the intake-air system
―  Cracks on the intake-air system parts
―  Intake-air system restriction
•  Inspect fuses.
•  Are all items normal?
Yes
Go to the next step.
No
Service if necessary.
Repeat Step 2.
3
•  Turn the engine switch to the ON position (Engine off).
•  Is FCV operation sound heard?
Yes
Go to the next step.
No
Inspect for the following:
•  Stuck FCV
•  Open circuit in FCV
•  Poor ground of FCV
Repair or replace any malfunctioning parts.
4
•  Measure the engine compression.
•  Is the compression normal?
Yes
Go to Step 6.
No
Go to the next step.
5
•  Inspect the timing belt for the following:
―  Chipping of gear teeth
―  Low tension
―  Breakage, damage or cracks
•  Is the timing belt normal?
Yes
Inspector for the following:
•  Burnt valve
•  Worn piston, piston ring or cylinder
•  Damaged cylinder head gasket
•  Damaged valve seat
•  Worn valve system or valve guide
Repair or replace if necessary.
No
If the timing is incorrect, adjust the timing.
If the timing belt is not normal, replace the timing belt.
6
•  Inspect the injection timing
•  Is the injection timing normal?
Yes
Go to the next step.
No
Adjust injection timing.
(See ENGINE TUNE-UP [WLT-1, WLT-2].)
7
•  Inspect the fuel filter for clogging.
•  Is the fuel filter normal?
Yes
Go to the next step.
No
Replace the fuel filter cartridge.
8
•  Remove the injection nozzle.
•  Inspect the injection nozzle for the following:
―  Clogged nozzle
―  Seized needle valve
―  Incorrect valve operating pressure
―  Malfunctioning nozzle gasket
•  Is the injection nozzle normal?
Yes
Go to the next step.
No
Clogged nozzle or seized needle valve:
•  Disassemble and clean or replace the injection nozzle.
Incorrect valve opening pressure:
•  Adjust injection nozzle opening pressure.
Malfunctioning nozzle gasket:
•  Replace the nozzle gasket.
9
•  Is the valve clearance correct?
Yes
Remove the FIP.
Inspect the FIP.
No
Adjust the valve clearance.
10
•  Verify the test results. If normal, return to the diagnostic index to service any additional symptoms.