P0341

CIRCUIT DESCRIPTION
The Camshaft Position (CMP) sensor is a hall-effect type sensor. The sensor produces 1 signal for each revolution of the camshaft in order to control the sequential fuel injection. There are not any direct circuits to the Powertrain Control Module (PCM). All of the circuits are between the CMP sensor and the Ignition Control Module (ICM). These circuits are the CMP signal circuit, the 12-volt reference circuit, and the low reference circuit. The PCM compares the CMP sensor signal to the number of 3X, low-resolution, engine speed signals generated by the ICM. The normal ratio of 3X signals is 6-to-1. If the PCM receives an incorrect number of CMP sensor signals, this DTC sets.

CONDITIONS FOR RUNNING THE DTC
The engine is running and the 3X reference pulses are being received.

CONDITIONS FOR SETTING THE DTC
CMP sensor reference pulses are not received in one engine cycle of 720 degrees of crankshaft rotation.

ACTION TAKEN WHEN THE DTC SETS
^ The control module illuminates the Malfunction Indicator Lamp (MIL) when the diagnostic runs and fails.
^ The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/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
Inspect for the following conditions:
^ Any secondary ignition wires arcing to a wiring harness-Inspect the secondary ignition wires for carbon tracking or for other signs of damage.
^ A faulty ignition coil-Remove the ignition coils and inspect the ignition control module and the coils for cracks, for carbon tracking, or for other signs that indicate that the coil secondary circuit is arcing to the ICM or to the ICM wiring harness. Refer to Ignition Coil(s) Replacement.

If the condition is suspected of being intermittent, refer to Intermittent Conditions. Intermittent Conditions

TEST DESCRIPTION

Steps 1-7:

Steps 8-17:

Steps 18-26:

The numbers below refer to the step numbers on the diagnostic table.
3. This step verifies that the fault is present.
22. This step determines if the fault is caused by a missing camshaft magnet or by a faulty PCM. The voltage measured in this step should be near 4 volts, and decrease to near 0 volts when the CMP sensor interfaces with the camshaft magnet.