DTC Troubleshooting: P0340 (57)
DTC P0340:
 CMP Sensor No Signal
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  1. Turn the ignition switch ON (II).
  1. Clear the DTC with the HDS.
  1. Start the engine. If engine does not start, keep cranking for 10 seconds.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0340 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.■
  1. Turn the ignition switch OFF.
  1. Disconnect the CMP sensor 3P connector.
  1. Turn the ignition switch ON (II).
  1. Measure voltage between CMP sensor 3P connector terminal No. 1 and body ground.
Is there about 5 V?
YES -
Go to Step 13 .
NO -
Go to Step 9 .
  1. Turn the ignition switch OFF, and wait 2 minutes.
  1. Disconnect ECM connector No. 1 (96P).
  1. Connect CMP sensor 3P connector terminal No. 1 to body ground with a jumper wire.
  1. Check for continuity between ECM connector No. 1 terminal No. 29 and body ground.
Is there continuity?
YES -
Go to Step 31 .
NO -
Repair open in the wire between the CMP sensor and ECM connector No. 1 terminal No. 29, then go to Step 26 .
  1. Measure voltage between CMP sensor 3P connector terminal No. 2 and body ground.
Is there about 5 V?
YES -
Go to Step 19 .
NO -
Go to Step 14 .
  1. Turn the ignition switch OFF, and wait 2 minutes.
  1. Disconnect ECM connector No. 1 (96P).
  1. Check for continuity between ECM connector No. 1 terminal No. 60 and body ground.
Is there continuity?
YES -
Repair short in the wire between the CMP sensor and ECM connector No. 1 terminal No. 60, then go to Step 26 .
NO -
Go to Step 17 .
  1. Connect CMP sensor 3P connector terminal No. 2 to body ground with a jumper wire.
  1. Check for continuity between ECM connector No. 1 terminal No. 60 and body ground.
Is there continuity?
YES -
Go to Step 31 .
NO -
Repair open in the wire between the CMP sensor and ECM connector No. 1 terminal No. 60, then go to Step 26 .
  1. Measure voltage between CMP sensor 3P connector terminals No. 1 and No. 3.
Is there about 5 V?
YES -
Go to Step 24 .
NO -
Go to Step 20 .
  1. Turn the ignition switch OFF, and wait 2 minutes.
  1. Disconnect ECM connector No. 1 (96P).
  1. Connect CMP sensor 3P connector terminal No. 3 to body ground with a jumper wire.
  1. Check for continuity between ECM connector No. 1 terminal No. 14 and body ground.
Is there continuity?
YES -
Go to Step 31 .
NO -
Repair open in the wire between the CMP sensor and ECM connector No. 1 terminal No. 14, then go to Step 26 .
  1. Turn the ignition switch OFF.
  1. Reconnect all connectors.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Start the engine.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0340 indicated?
YES -
Check for poor connections or loose terminals at the CMP 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.■
  1. Reconnect all connectors.
  1. Start the engine.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0340 indicated?
YES -
Check for poor connections or loose terminals at the CMP sensor and the ECM. If the ECM was updated, substitute a known-good ECM, then go to Step 33 . 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. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■