Code No. P1497: DPF System Malfunction


FUNCTION



  • The engine-ECU monitors the input signals from sensors to check if the DPF regeneration is executed normally.

TROUBLE JUDGMENT


Check Condition
  • On DPF regeneration
Judgement Criterion
  • The DPF regeneration status continues for the predetermined time or more.

FAIL-SAFE AND BACKUP FUNCTION



  • The throttle valve is opened. (Electrical discontinuity)
  • The EGR control is stopped (fully closed).
  • The DPF regeneration is prohibited.
  • The AS&G control is prohibited.

PROBABLE CAUSES



  • Failed No. 2 exhaust gas temperature sensor (catalyst temperature)
  • Failed No. 3 exhaust gas temperature sensor (DPF temperature)
  • Failed exhaust differential pressure sensor
  • Catalytic converter inactive
  • The engine oil-containing ash is loaded to the DPF inside.

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list.

  • Refer to Data List Reference Table .

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

Q. Are the check results normal?
Go to Step 2.
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 2. Forcible DPF regeneration execution

  • Initialise the DPF-related parts, and then delete the diagnosis code (Refer to GROUP 00 - Precautions before Service - Initialisation Procedure for Learning Value in Common Rail Engine <4N1> ).

  1. Item 42: DPF system malfunction service
  • Carry out the forcible DPF regeneration (Refer to GROUP 17 - Emission Control <DIESEL> - Diesel Particulate Filter (DPF) System - Forcible DPF Regeneration ).
    		•

    Q. Is the diagnosis code P0420 or P1497 set?
    Replace the catalytic converter. When the catalytic converter is replaced, initialise the learning value (Refer to GROUP 00 - Precautions before Service - Initialisation Procedure for Learning Value in Common Rail Engine <4N1> ). On completion, carry out the forcible DPF regeneration (Refer to GROUP 17 - Emission Control <DIESEL> - Diesel Particulate Filter (DPF) System - Forcible DPF Regeneration ).
    Replace the engine-ECU.