Inspection Procedure 5: Starting impossible (Starter operative but No initial combustion)


COMMENTS ON TROUBLE SYMPTOM



  • Failure is possibly caused by failed ignition circuit, fuel feed and so on.

PROBABLE CAUSES



  • Failed battery
  • Timing belt broken
  • Contamination around the throttle valve
  • Failed ignition system
  • Failed fuel system
  • Failed engine-A/T-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check battery voltage.

  • Measure battery voltage at cranking.
OK: 8 V or higher

Q. Is the check result normal?
Go to Step 2 .
Check battery (Refer to GROUP 54A - Battery - On-vehicle Service - Battery Test ).

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

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

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

  • Item 09: Fuel pump
OK: Operating sound of fuel pump can be heard

Q. Is the check result normal?
Go to Step 4 .
Check fuel pump system (Refer to Inspection Procedure 20 ).

STEP 4. Check timing belt for breakage.

  • Engine: Cranking
OK: Camshaft rotates

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

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

Q. Is the check result normal?
Go to Step 6 .
Clean throttle body (throttle valve portion) (Refer to ).

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

  • Refer to Data List Reference Table .

  1. Item 02: Crank angle sensor

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

STEP 7. Visual check of ignition spark.

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

Q. Is the check result normal?
Go to Step 9 .
Go to Step 8 .

STEP 8. Check spark plug

  • Check spark plug itself (Refer to GROUP 16 - Ignition System - On-vehicle Service - Spark plug Check and Cleaning ).

Q. Is the check result normal?
Check ignition circuit system (Refer to Inspection Procedure 25 ).
Replace the spark plug.

STEP 9. Check injector for operating sound.

  • Check injector for operating sound at engine cranking (Refer to ).

Q. Can operating sound be heard?
Go to Step 10 .

    Check the injector system of the defective cylinder.
    (Refer to Code No. P0201: No. 1 Injector System ).
    (Refer to Code No. P0202: No. 2 Injector System ).
    (Refer to Code No. P0203: No. 3 Injector System ).
    (Refer to Code No. P0204: No. 4 Injector System ).
    (Refer to Code No. P0205: No. 5 Injector System ).
    (Refer to Code No. P0206: No. 6 Injector System ).

STEP 10. Fuel pressure measurement.

  • Fuel pressure measurement (Refer to ).

Q. Is the check result normal?
Go to Step 11 .
Repair.

STEP 11. Replace the engine-A/T-ECU.

  • After the engine-A/T-ECU has been replaced, check for the trouble symptom again.

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