Inspection Procedure 8: Starting Impossible (Initial Combustion But No Complete Combustion), Improper Starting (Long Time to Start) <FFV>

COMMENT ON TROUBLE SYMPTOM

Failure is possibly caused by poor ignition, incorrect air-fuel ratio at cranking, improper fuel pressure or other faults.

PROBABLE CAUSES

Failed battery
Failed ignition system
Failed fuel system
Air-fuel ratio control
Estimated ethanol concentration not learned
Failed throttle valve control system
Failed intake system
Throttle valve fouled around
Timing chain not in place
Compression pressure improper
Failed engine-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. Diagnosis code set?

	Inspection chart for diagnosis codes (Refer to )

	Go to Step 3 .

STEP 3. M.U.T.-III data list

Refer to Data List Reference Table .

Item No. 6: Intake air temperature sensor
Item No. 7: Manifold absolute pressure sensor
Item No. 8: Engine coolant temperature sensor

Q. Are the check results normal?

	Go to Step 4 .

	Perform the diagnosis code classified check procedure for the sensor that has shown an abnormal data value (Refer to Inspection Chart for Diagnosis Code ).

STEP 4. Forced learning of estimated ethanol concentration execution

Carry out the estimated ethanol concentration forcible learning (Refer to GROUP 00 - Precautions Before Service - Forced Learning of Estimated Ethanol Concentration ), reconfirm whether the trouble symptom.

Q. Does trouble symptom presist?

	Go to Step 5 .

	Check end.

STEP 5. Check throttle body (throttle valve) 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 actuator test

Item No. 5: Fuel pump

OK: Operating sound of fuel pump can be heard.

Q. Is the check result normal?

	Go to Step 7 .

	Check fuel pump system (Refer to Inspection Procedure 37 ).

STEP 7. Check injector for operating sound.

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

Q. Can operating sound be heard?

	Go to Step 8 .

	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 )

STEP 8. Check timing marks of timing chain.

Q. Is the check result normal?

	Go to Step 9 .

	Align timing marks.

STEP 9. 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 10 .

	Check ignition circuit system (Refer to Inspection Procedure 39 ).

STEP 10. Check spray condition of injector.

Check each injector for spray condition (Refer to ).

Q. Is the check result normal?

	Go to Step 11 .

	Replace the injector.

STEP 11. Check compression pressure.

Check compression pressure (Refer to GROUP 11C - On-vehicle Service - Compression Pressure Check ).

Q. Is the check result normal?

	Go to Step 12 .

	Repair the compression pressure.

STEP 12. Check for foreign matters (water, diesel fuel, etc.) in fuel

Q. Is the check result normal?

	Replace the fuel

	Go to Step 13 .

STEP 13. Check malfunction phenomenon after replacing fuel

Remove all the fuel from the fuel tank and the fuel supply line to replace it with the petrol.
Carry out the estimated ethanol concentration forcible learning (Refer to GROUP 00 - Precautions Before Service - Forced Learning of Estimated Ethanol Concentration ), reconfirm whether the trouble symptoms

Q. Does the trouble symptom persist?

	Replace the engine-ECU then perform the variant coding (Refer to GROUP 00 - Precautions Before Service - How to Perform Variant Coding ).

	Check end.