P1345

CIRCUIT DESCRIPTION
This Diagnostic Trouble Code (DTC) monitors the Crankshaft Position (CKP) and the Camshaft Position (CMP) signals to determine if they are synchronized. If both signals are not observed by the control module within a narrow time window, the Powertrain Control Module (PCM) 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 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) on the second consecutive ignition cycle that the diagnostic runs and fails. The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The control module turns OFF the Malfunction Indicator Lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
^ A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
^ A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
^ Use a scan tool in order to clear the MIL and the DTC.

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

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 inspect any circuitry that is suspected of causing the intermittent complaint. Refer to Testing for Intermittent and Poor Connections in Diagrams.

It a repair is necessary, refer to Wiring Repairs or Connector Repairs in Diagrams.

TEST DESCRIPTION

Steps 1-3:

Steps 4-11:

The numbers below refer to the step numbers on the table.
4. This test will determine if this DTC is intermittent.
5. When the engine speed is raised to 2,000 RPM the camshaft retard offset should not vary more than 2 degrees.
6. If excessive pressure is used when performing this test unintentional damage to the distributor shaft could result.
7. If the distributor is one tooth off in either the advanced or retard positions the vehicle may run but 0 degrees camshaft retard offset will not be obtained.
8. If 0 degrees cannot be obtained during this procedure refer to Diagnostic Aids.