P0344

DTC P0344: CMP Sensor Intermittent Interruption

1. Note this freeze data:

- Engine speed
- Vehicle speed

2. Clear the DTC with the HDS.
3. Start the engine, and let it idle for 10 seconds.
4. Check the CMP NOISE 2 count in the DATA LIST with the HDS.

Are 0 counts indicated?

YES - Go to step 7.

NO - Go to step 5.

5. Test-drive the vehicle for several minutes in the range of the recorded freeze data.
6. Check the CMP NOISE 2 count in the DATA LIST with the HDS.

Are 0 counts indicated?

YES - Go to step 7.

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

7. Check for poor or loose connections at these connectors and terminals:

- CMP sensor
- ECM/PCM
- Engine ground
- Body ground

Are the connections OK?

YES - Go to step 8.

NO - Reconnect the connectors or terminals, then go to step 11.

8. Check for damage to the CMP sensor pulse projection on the front camshaft pulley.

Is there damage?

YES - Replace the front camshaft pulley, then go to step 11.

NO - Go to step 9.

9. Turn the ignition switch OFF.
10. Replace the CMP sensor.
11. Turn the ignition switch ON (II).
12. Reset the ECM/PCM with the HDS.
13. Clear the CKP pattern with the HDS.
14. Do the ECM/PCM idle learn procedure.
15. Do the CKP pattern learn procedure.
16. Start the engine, and let it idle for 10 seconds.
17. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P0344 is indicated, check for poor connections or loose terminals at the CKP sensor and the ECM/PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - Troubleshooting is complete.