Code No. P1498: Excessive PM Accumulated In DPF


FUNCTION



  • The engine-ECU monitors the input signals from sensors to estimate the PM amount loaded to the DPF inside.
  • If the PM is loaded more than the specified amount, the DPF regeneration is automatically executed under certain conditions in order to eliminate the PM.
  • If the PM is excessively loaded, the engine-ECU does not execute the automatic DPF regeneration. It makes the engine warning lamp illuminate and allow the DPF warning mark to be shown.

TROUBLE JUDGMENT


Check Condition
  • Ignition switch is in "ON" position.
Judgement Criterion
  • Driving distance exceeds the specified value after the last DPF regeneration.

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 fuel injection amount is restricted (Output restriction).
  • The open angle of the accelerator pedal is restricted.
  • The AS&G control is prohibited.

PROBABLE CAUSE



  • The PM is abnormally loaded to the DPF inside.

DIAGNOSIS PROCEDURE

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

  • Check whether the diagnosis code P2463 is set together with P1498 or not.

Q. Is the diagnosis code P2463 set?
Troubleshoot the diagnosis code P2463 (Refer to ).
Go to Step 2.

STEP 2. Forcible DPF regeneration execution

  • 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 set?
Inspection chart for diagnosis code (Refer to ).
Check end.