FUNCTION
TROUBLE JUDGMENT
PROBABLE CAUSES
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q.
Is any other diagnosis code than P1274 set?


STEP 2. Check suction control valve itself


Q.
Is the check result normal?


STEP 3. Replace the supply pump assembly.


Q.
Does trouble symptom persist?

STEP 4. Replace the common rail assembly and fuel injection tubes.
Q.
Does trouble symptom persist?


