P0344

DTC P0340: CMP Sensor A No Signal (2004-2005 models)

DTC P0344: CMP Sensor A Circuit Intermittent Interruption (2004 - 2005 models)

NOTE:
- Information marked with an asterisk (*) applies to 2004-2005 models.
- Information marked with double asterisk (**) applies to 2000-2003 models.
- Before you troubleshoot, record all freeze data and review the general troubleshooting information.

1. Reset the ECM.
2. Start the engine.

Is DTC P0344* (P1361)** or P0340* (P1362)** indicated?

YES - Go to step 3.

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

3. Turn the ignition switch OFF.
4. Disconnect CMP (TDC) sensor A 2P connector.




5. At the sensor side, measure resistance between CMP (TDC) sensor 2P connector terminals No. 1 and No. 2.

Is there 1,850 - 2,450 Ohm?

YES - Go to step 6.

NO - Replace CMP (TDC) sensor A.




6. At the sensor side, check for continuity to body ground on both terminals individually.

Is there continuity?

YES - Replace CMP (TDC) sensor A.

NO - Go to step 7.

7. Reconnect CMP (TDC) sensor A 2P connector.
8. Disconnect ECM connector C (31P).




9. Measure resistance between ECM connector terminals C20 and C21.

Is there 1,850 - 2,450 Ohm?

YES - Go to step 10.

NO - Repair open or short in the faulty sensor wire(s).




10. Check for continuity between body ground and ECM connector terminal C20.

Is there continuity?

YES - Repair short to body ground in the faulty sensor wire(s).

NO - Substitute a known-good ECM and recheck. If the symptom/indication goes away, replace the original ECM.