DTC P0340: CMP Sensor No Signal
DTC P0344: CMP Sensor Intermittent Interruption
- Reset the ECM (see page 11-4).
- Start the engine.
Is DTC P0340 and/or P0344 indicated?
YES - Go to step 3.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the CMP sensor and at the ECM. 
- Turn the ignition switch OFF.
- Disconnect the CMP sensor 3P connector.
- Turn the ignition switch ON (II).
- Measure voltage between the CMP sensor 3P connector terminal No. 3 and body ground.
CMP SENSOR 3P CONNECTOR
Wire side of female terminals
Is there battery voltage?
YES - Go to step 7.
NO - Check the No. 4 ACG (10A) fuse in the under-dash fuse/relay box. If the fuse OK, repair open in the wire between the CMP sensor and No. 4 ACG (10A) fuse.
- Measure voltage between the CMP sensor 3P connector terminal No. 1 and body ground.
CMP SENSOR 3P CONNECTOR
Wire side of female terminals
Is there about 5 V?
YES - Go to step 8.
NO - Go to step 10.
- Measure voltage between the CMP sensor 3P connector terminals No. 2 and No. 3.
CMP SENSOR 3P CONNECTOR
Wire side of female terminals
Is there battery voltage?
YES - Go to step 9.
NO - Repair open in the wire between the CMP sensor and G101.
- Substitute a known-good CMP sensor and recheck.
Is DTC P0340 and/or P0344 indicated?
YES - Substitute a known-good ECM and recheck (see page 11-5). If symptom/indication goes away, replace the original ECM.
NO - Replace the original CMP sensor.