P1345

Circuit Description
This DTC monitors the CKP and CMP signals to determine if they are synchronized. If both signals are not observed by the Control Module (PCM/VCM) within a narrow time window, the VCM will determine that an error has occurred.

Conditions for Running the DTC
The engine is running

Conditions for Setting the DTC
When the engine is running, the cam sensor reference pulse is not detected at the correct relative position to the crankshaft position sensor pulse.

Action Taken When the DTC Sets
^ The Control Module illuminates the Malfunction Indicator Lamp (MIL) the first time the diagnostic runs and fails.
^ The Control Module will set the DTC and records the operating conditions at the time the diagnostic fails. The Control Module stores the failure information in the scan tools Freeze Frame and/or the Failure Records.

Conditions for Clearing the MIL/DTC
^ The Control Module turns OFF the MIL after 3 consecutive drive trips when the test has Run and Passed.
^ A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles (coolant temperature has risen 22°C (40°F) from the start-up coolant temperature and the Engine Coolant Temperature is more than 70°C (158°F) during the same ignition cycle).
^ Use the scan tool Clear Information function.

Diagnostic Aids
The check following items:
^ A loose CMP sensor causing a variance in the sensor signal
^ Excessive free play in the timing chain and gear assembly
^ Incorrectly installed distributor - 1 tooth off in either advance or retard positions
^ A loose distributor rotor on the distributor shaft
^ A loose or missing distributor hold down bolt

An intermittent may be caused by any of the following conditions:
^ A poor connection
^ Rubbed through wire insulation
^ A broken wire inside the insulation

Thoroughly check any circuitry that is suspected of causing the intermittent complaint. Refer to Intermittents and Poor Connections Diagnosis. Symptom Related Diagnostic Procedures

Test Description
The numbers below refer to the step numbers on the table.
4. This test will determine if this DTC is intermittent.
5. If there is a variance in the camshaft sensor signal it will be detected in this step.
6. Unintentional damage to the distributor shaft may result if excessive pressure is used to rotate the distributor.