FUNCTION
TROUBLE JUDGMENT
PROBABLE CAUSES
DIAGNOSTIC PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q.
Is any other diagnosis code than P0093 set?


STEP 2. Detection of fuel line leakage
Q.
Is the check result normal?

STEP 3. Release the air from the fuel line.
Q.
Does the trouble symptom persist?

STEP 4. Connector check: A-44 rail pressure sensor connector and C-105 engine-ECU connector.


Q.
Are the check results normal?

STEP 5. Check harness between A-44 (terminal No. 1) rail pressure sensor connector and C-105 (terminal No. 70) engine-ECU connector.


Q.
Is the check result normal?

STEP 6. Check harness between A-44 (terminal No. 2) rail pressure sensor connector and C-105 (terminal No. 64) engine-ECU connector.


Q.
Is the check result normal?

STEP 7. Check harness between A-44 (terminal No. 3) rail pressure sensor connector and C-105 (terminal No. 88) engine-ECU connector.


Q.
Is the check result normal?

STEP 8. Detection of fuel leakage from injector body
Q.
Is the check result normal?


STEP 9. Replace the common rail assembly and fuel injection tubes.
Q.
Does the trouble symptom persist?


