Inspection Procedure 5: Starting Impossible (starter operative but no initial combustion)


COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Check battery.

  • Check battery (Refer to GROUP 54A - Battery - On-vehicle Service - Battery Test ).

Q. Is the check result normal?
Go to Step 2.
Replace the battery.

STEP 2. M.U.T.-III diagnosis code

Q. Is diagnosis code stored?
Inspection chart for diagnosis code (Refer to ).
Go to Step 3.

STEP 3. M.U.T.-III actuator test

  • Item 9: Fuel pump
OK: Operating sound of fuel pump can be heard

Q. Is the check result normal?
Go to Step 4.
Check Inspection Procedure - fuel pump system (Refer to ).

STEP 4. Check timing chain for breakage.

  • Engine: Cranking
OK: Camshaft rotates

Q. Is the check result normal?
Go to Step 5.
Replace the timing chain.

STEP 5. Check throttle body (throttle valve portion) contamination.

Q. Is the check result normal?
Go to Step 6.
Throttle body (throttle valve area) cleaning (Refer to ).

STEP 6. M.U.T.-III data list

  • Data list reference table (Refer to ).

    1. Item 2: Crank angle sensor

Q. Is the check result normal?
Go to Step 7.
Check code No. P0335: crank angle sensor system (Refer to ).

STEP 7. Visual check of ignition spark.

  • Remove the spark plug and install it to the ignition coil.
  • Connect the ignition coil connector.
  • Disconnect all injector connectors.
  • At the engine start, check each spark plug produces a spark.

Q. Is the check result normal?
Go to Step 8.
Check Inspection Procedure - ignition circuit system (Refer to ).

STEP 8. Check injector for operating sound.

  • Injector check (Refer to ).

Q. Is operating sound audible?
Go to Step 9.

    Check the injector system of the defective cylinder.
    (Refer to P0261: No.1 injector circuit low input ).
    (Refer to P0262 No.1 injector circuit high input ).
    (Refer to P0264 No.2 injector circuit low input ).
    (Refer to P0265 No.2 injector circuit high input ).
    (Refer to P0267 No.3 injector circuit low input ).
    (Refer to P0268 No.3 injector circuit high input ).

STEP 9. Fuel pressure measurement.

  • Fuel pressure test (Refer to ).

Q. Is the check result normal?
Go to Step 10.
Repair.

STEP 10. Replace the engine-ECU.

  • After replacing the engine-ECU re-check the trouble symptoms.

Q. Does the trouble symptom persist?
Check for foreign matters (water, diesel fuel, etc.) in fuel and replace if necessary.
Check end.