Code No. P1498: Excessive PM Accumulated In DPF <EURO5>

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 JUDGEMENT

Check Condition

Ignition switch is in "ON" position.
Vehicle in steady running.

Judgement Criterion

The exhaust differential pressure sensor output voltage is higher than the threshold value based on exhaust gas flow for predetermined time.

FAIL-SAFE AND BACKUP FUNCTION

The EGR control is stopped (fully closed).
The fuel injection amount is restricted (Output restriction).
The open angle of the accelerator pedal is restricted.

PROBABLE CAUSE

The PM is abnormally loaded to the DPF inside.

DIAGNOSIS PROCEDURE

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

Q. Is diagnosis code P0101 or P2453 set?

	Troubleshoot the diagnosis codes (Refer to ). Then go to Step 2.

	Go to Step 2.

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

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

Q. Is diagnosis code P2463 set?

	Troubleshoot diagnosis code P2463 (Refer to ).

	Go to Step 3.

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

Refer to Data List Reference Table .

Q. Is the item 545 ON ?

	Troubleshoot diagnosis code P2463 (Refer to ).

	Go to Step 4.

STEP 4. Forcible DPF regeneration execution

Carry out the forcible DPF regeneration (Refer to GROUP 17 - Emission Control <DIESEL> - Diesel Particulate Filter (DPF) System<4N1-EURO5> - Forcible DPF Regeneration ).
Carry out the small injection quantity learning procedure (Refer to GROUP 00 - Precautions before Service - Small Injection Quantity Learning Procedure ).
Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?

	Inspection chart for diagnosis code (Refer to ).

	Check end.