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 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 3X reference pulses are being received.

CONDITIONS FOR SETTING THE DTC
No CMP sensor reference pulses are received in one engine cycle of 720 degrees of crankshaft rotation.

ACTION TAKEN WHEN THE DTC SETS
^ First failure:
- The MIL is not turned ON.
- A DTC is stored in memory under Failed Last Test.
- The Failure Records are stored.
^ Second consecutive drive cycle with a failure:
- The MIL is turned ON.
- A DTC is stored in memory under history.
- The Freeze Frame data is stored.
- The Failure Records are stored.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The control module turns OFF the malfunction indicator lamp (MIL) after the third consecutive trip the diagnostic has run and passed.
^ The history DTC will clear if the fault conditions have not been detected for 40 warm-up cycles.
^ A scan tool can be used to clear DTC information.

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 other signs of damage.
^ A faulty ignition coil. Remove the ignition coils and inspect 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 1-7:

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.