Code No. P0004: Suction Control Valve Battery Short




OPERATION




FUNCTION




TROUBLE JUDGMENT


Check Conditions
Judgment Criterion

FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES




DIAGNOSTIC PROCEDURE


STEP 1. 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 2.
Repair or replace the connector, or replace the suction control valve.

STEP 2. Check harness between engine-ECU connector terminal SCV+ and suction control valve connector terminal.



  • Check power supply line for short circuit.

Q. Is the check result normal?

Go to Step 3.
Repair or replace the connector, or repair the damaged harness wire.

STEP 3. Check harness between engine-ECU connector terminal SCV- and suction control valve connector terminal.



  • Check earthing line for short circuit.

Q. Is the check result normal?

Go to Step 4.
Repair or replace the connector, or repair the damaged harness wire.

STEP 4. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?

Replace the engine-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).