DTC Troubleshooting: P0340 (57) (K20Z: M/T)

DTC Troubleshooting: P0340 (57)

DTC P0340:  CMP Sensor A No Signal


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

1.Turn the ignition switch 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 P0340 indicated?


YES - Go to 5.


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


5.Turn the ignition switch OFF.

6.Disconnect CMP sensor A 3P connector.

7.Turn the ignition switch ON (II).

8.Measure voltage between CMP sensor A 3P connector terminal No. 3 and body ground.

 

Is there battery voltage?


YES - Go to 9.


NO - Repair open in the wire between CMP sensor A and the No. 3 ALTERNATOR (10 A) fuse then go to 18.

9.Measure voltage between CMP sensor A 3P connector terminal No. 1 and body ground.

 

Is there about 5 V?


YES - Go to 10.


NO - Go to 11.


10.Measure voltage between CMP sensor A 3P connector terminals No. 2 and No. 3.

 

Is there battery voltage?


YES - Go to 16.


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

11.Turn the ignition switch OFF.

12.Jump the SCS line with the HDS.

13.Disconnect ECM/PCM connector C (44P).

14.Check for continuity between ECM/PCM connector terminal C41 and body ground.

 

Is there continuity?


YES - Repair short in the wire between the ECM/PCM (C41) and CMP sensor A, then go to 18.


NO - Go to 15.

15.Check for continuity between CMP sensor A 3P connector terminal No. 1 and ECM/PCM connector terminal C41.

 

Is there continuity?


YES - Go to 23.


NO - Repair open in the wire between the ECM/PCM (C41) and CMP sensor A, then go to 18.

16.Turn the ignition switch OFF.

17.Replace CMP sensor A.

18.Reconnect all connectors.

19.Turn the ignition switch ON (II).

20.Reset the ECM/PCM with the HDS.

21.Do the ECM/PCM idle learn procedure.

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

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P0340 is indicated, check for poor connections or loose terminals at CMP sensor A and the ECM/PCM, then go to 1.If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - Troubleshooting is complete.n


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

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

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P0340 is indicated, check for poor connections or loose terminals at CMP sensor A and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.n