DTC Troubleshooting

DTC Troubleshooting: P0335

DTC P0335: CKP Sensor No Signal

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. Start the engine.

4. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0335 indicated?
YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the CKP sensor and the ECM.


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

6. Disconnect the CKP sensor 3P connector.

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

8. Measure the voltage between CKP sensor 3P connector terminal No. 3 and body ground.

Is there battery voltage?
YES - Go to step 9.

NO - Repair open in the wire between the CKP sensor and PGM-FI main relay 1 (FI MAIN), then go to step 18.






9. Measure the voltage between CKP sensor 3P connector terminal No. 1 and body ground.

Is there about 5 V?
YES - Go to step 10.

NO - Go to step 11.






10. Measure the voltage between CKP sensor 3P connector terminals No. 2 and No. 3.

Is there battery voltage?
YES - Go to step 16.

NO - Repair open in the wire between the CKP sensor and G101, then go to step 18.






11. Measure the voltage between ECM connector terminal A7 and body ground.

Is there about 5 V?
YES - Repair open in the wire between the ECM (A7) and the CKP sensor, then go to step 18.

NO - Go to step 12.






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

13. Jump the SCS line with the HDS.

14. Disconnect ECM connector A (31P).

15. Check for continuity between ECM connector terminal A7 and body ground.

Is there continuity?
YES - Repair short in the wire between the ECM (A7) and the CKP sensor, then go to step 18.

NO - Go to step 25.






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

17. Replace the CKP sensor. CKP Sensor Replacement

18. Reconnect all connectors.

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

20. Reset the ECM with the HDS.

21. Clear the CKP pattern with the HDS.

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

23. Do the CKP pattern learn procedure. Initial Inspection and Diagnostic Overview

24. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0335 indicated?
YES - Check for poor connections or loose terminals at the CKP sensor and the ECM, then go to step 1.

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


25. Reconnect all connectors.

26. Update the ECM if it does not have the latest software, ECM Update or substitute a known-good ECM. Initial Inspection and Diagnostic Overview

27. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0335 indicated?
YES - Check for poor connections or loose terminals at the CKP sensor and the ECM. If the ECM was updated, substitute a known-good ECM, Initial Inspection and Diagnostic Overview then recheck. If the ECM was substituted, go to step 1.

NO - If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. Service and Repair If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.