Code No. P1275: Supply Pump Exchange




FUNCTION




TROUBLE JUDGMENT


Check Conditions
Judgment Criterion

FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


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


Q. Is any other diagnosis code than P1275 output?

Inspection chart for diagnosis codes (Refer to ).
Go to Step 2.

STEP 2. Check suction control valve itself.



  • Suction control valve connector check.
  • Check suction control valve itself (Refer to ).

Q. Is the check result normal?

Go to Step 3.
Repair or replace the connector, or replace the suction control valve. After replacing the suction control valve, learn the supply pump. (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns <4N1> ).

STEP 3. Replace the supply pump.



  • After the supply pump assembly, learn the supply pump (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns <4N1> ).
  • After learning the supply pump, re-check the trouble symptoms.

Q. Does trouble symptom persist?

Go to Step 4.
The check is end.

STEP 4. Replace the common rail assembly and fuel injection tubes.



  • After replacing the common rail assembly and fuel injection tubes, re-check the trouble symptoms.

Q. Does trouble symptom persist?

Replace the engine-ECU.
The check is end.