## DTC Troubleshooting: P0340 (8-5), P0344 (8-7)

DTC P0340 (8-5): | CMP (TDC) Sensor No Signal

1. | Reset the ECM/PCM.

2. | Start the engine. Is DTC P0340 and/or P0344 indicated? YES - Go to 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the CMP (TDC) sensor and at the ECM/PCM.n

3. | Turn the ignition switch OFF.

4. | Disconnect the CMP (TDC) sensor 3P connector.

5. | Turn the ignition switch ON (II).

6. | Measure voltage between the CMP (TDC) sensor 3P connector terminal No. 3 and body ground. Is there battery voltage? YES - Go to 7. NO - Repair open in the wire between the PGM-FI main relay 1 and the CMP (TDC) sensor.n

7. | Measure voltage between the CMP (TDC) sensor 3P connector terminal No. 1 and body ground. Is there about 5 V? YES - Go to 8. NO - Go to 10.

8. | Measure voltage between the CMP (TDC) sensor 3P connector terminals No. 2 and No. 3. Is there battery voltage? YES - Go to 9. NO - Repair open in the wire between the CMP (TDC) sensor and G101.n

9. | Substitute a known-good CMP (TDC) sensor and recheck. Is DTC P0340 and/or P0344 indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/ PCM.n NO - Replace the original CMP (TDC) sensor.n

10. | Measure voltage between ECM/PCM connector terminal A26 and body ground. Is there about 5 V? YES - Repair open in the wire between the ECM/PCM (A26) and CMP (TDC) sensor.n NO - Go to 11.

11. | Turn the ignition switch OFF.

12. | Disconnect ECM/PCM connector A (31P).

13. | Check for continuity between ECM/PCM connector terminal A26 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (A26) and the CMP (TDC) sensor.n NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/ PCM.n