Inspection Procedure 22: The DPF Regeneration Interval is Short


PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code.

Q. Is the diagnosis code set?
Inspection chart for diagnosis code (Refer to ).
Go to Step 2.

STEP 2. M.U.T.-III data list.

  • Refer to Data List Reference Table

    1. Item 117: No. 1 exhaust gas temperature sensor
    2. Item 118: No. 2 exhaust gas temperature sensor (catalyst temperature)
    3. Item 119: No. 3 exhaust gas temperature sensor (DPF temperature)
    4. Item 120: Exhaust differential pressure sensor

Q. Are the check results normal?
Go to Step 3.
Replace a defective sensor(s).

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

  • Refer to Data List Reference Table .

    1. Item 114: Air flow sensor

Q. Is the check result normal?
Go to Step 4.
Replace the air flow sensor.

STEP 4. Check injector identification code.

  • Check injector identification code (Refer to GROUP 00 - Precautions Before Service - Injector Identification code Registration Procedure ).

Q. Is the check result normal?
Go to Step 5.
Register the injector ID.

STEP 5. M.U.T.-III actuator test.

  • Refer to Actuator Test Reference Table .

    1. Item 15: Injector No. 1
    2. Item 16: Injector No. 2
    3. Item 17: Injector No. 3
    4. Item 18: Injector No. 4

Q. Is the check result normal?
Go to Step 6.
Replace the injector at the failed cylinder. After replacing the Injector, register the injector identification code and learn fuel injection (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns ).

STEP 6. Check injector itself.

  • Check injector itself (Refer to ).

Q. Is the check result normal?
Execute the small injection quantity learning (Refer to GROUP 00 - Precautions Before Service - Small Injection Quantity Learning Procedure ).
Replace the injector at the failed cylinder. After replacing the Injector, register the injector identification code and learn fuel injection (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns ).