P0341

CIRCUIT DESCRIPTION
The camshaft position (CMP) sensor is a hall-effect type sensor. The sensor produces one signal for each revolution of the camshaft in order to control the sequential fuel injection. There are no direct circuits from the CMP sensor 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 ICM also supplies a camshaft position signal circuit to the PCM. 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 3X reference pulses are being received.

CONDITIONS FOR SETTING THE DTC
The PCM does not receive CMP sensor reference pulses during one rotation of the camshaft.

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.
- Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS
Inspect for the following conditions:
- Any secondary ignition wires arcing to a wiring harness and for carbon tracking or other signs of damage
- A faulty ignition coil
- The ignition control module and the coils for cracks, carbon tracking, or 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 1-3:

Steps 4-7:

Steps 8-9:

Steps 10-13:

Steps 14-18:

Steps 19-24:

Steps 25-30:

Steps 31-32:

The numbers below refer to the step numbers on the diagnostic table.
14. This test verifies if the sensor is working correctly. By suppling a ground to the circuit, the voltage should change when the circuit is touched with a test lamp.
26. 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 5 volts, and decrease to near 0 volts when the CMP sensor interfaces with the camshaft magnet.