Code No. P0327: Detonation Sensor Circuit Low Input




OPERATION




FUNCTION




TROUBLE JUDGEMENT


Check Conditions
Judgement Criterion

FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Check harness between detonation sensor connector terminal and engine-ECU connector terminal K/SE.



  • Check earthing line for open circuit and damage.

Q. Is the check result normal?

Go to Step 2.
Repair or replace the connector, or repair the damaged harness wire.

STEP 2. Check harness between detonation sensor connector terminal and engine-ECU connector terminal K/S.



  • Check power line for open/short circuit and damage.

Q. Is the check result normal?

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

STEP 3. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is diagnosis code stored?

Go to Step 4.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 4. Replace the detonation sensor



  • After replacing the detonation sensor, reconfirm whether the diagnosis code is stored.

Q. Is the diagnosis code stored?

Replace the engine-ECU.
Check end.