DTC Troubleshooting

DTC Troubleshooting: P0327

DTC P0327:

Knock Sensor Circuit Low Voltage

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0).

4. Turn the ignition switch to ON (II).

5. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0327 indicated?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the knock sensor and the PCM.

6. Turn the ignition switch to ON (II).

7. Clear the DTC with the HDS.

8. Turn the ignition switch to LOCK (0).

9. Disconnect the knock sensor 2P connector.

10. Turn the ignition switch to ON (II).

11. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0328 indicated?

YES -

Go to step 17.

NO -

Go to step 12.

12. Turn the ignition switch to LOCK (0).

13. Jump the SCS line with the HDS.

14. Disconnect PCM connector C (49P).

15. Check for continuity between knock sensor 2P connector terminals No. 1 and No. 2.





Is there continuity?

YES -

Repair a short in the wires between PCM connector terminals C38 (KSGND line) and C48 (KS line), then go to step 19.

NO -

Go to step 16.

16. Check for continuity between knock sensor 2P connector terminal No. 2 and body ground.





Is there continuity?

YES -

Repair a short in the wire between the knock sensor and the PCM (C46), then go to step 19.

NO -

Go to step 24.

17. Turn the ignition switch to LOCK (0).

18. Replace the knock sensor Service and Repair.

19. Reconnect all connectors.

20. Turn the ignition switch to ON (II).

21. Reset the PCM with the HDS.

22. Do the PCM idle learn procedure PCM Idle Learn Procedure.

23. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0327 indicated?

YES -

Check for poor connections or loose terminals at the knock sensor and the PCM, then go to step 1.

NO -

Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

24. Reconnect all connectors.

25. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.

26. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0327 indicated?

YES -

Check for poor connections or loose terminals at the knock sensor and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to step 1.

NO -

If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.