P0342

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

The Camshaft Position Sensor (CMP) is used to correlate crankshaft to camshaft position so that the Powertrain Control Module (PCM) can determine which cylinder is ready to be fueled by the injector. The CMP sensor is also used to determine which cylinder is misfiring when misfire is present. If the PCM receives an intermittent signal from the CMP, then the CMP Resync Counter will increment. When the PCM cannot use the information from the CMP sensor, a DTC is set and the PCM will fuel the engine using the Alternating Synchronous Double Fire (ASDF) method.

CONDITIONS FOR SETTING THE DTC

^ Engine is running.

^ CMP Activity is not incrementing.

ACTION TAKEN WHEN THE DTC SETS

^ The Malfunction Indicator Lamp (MIL) will illuminate.

^ The PCM will record operating conditions at the time the diagnostic tails. This information will be stored in the Freeze Frame and Failure Records buffers.

^ A history DTC is stored.

^ Coolant fan turns ON.

CONDITIONS FOR CLEARING THE MIL/DTC

^ The MIL will turn OFF after three consecutive ignition cycles in which the diagnostic runs without a fault.

^ A history DTC will clear after 40 consecutive warm up cycles without a fault.

^ DTC(s) can be cleared by using the scan tool.

DIAGNOSTIC AIDS

^ An Intermittent problem may be caused by a poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation.

^ Any circuitry, that is suspected as causing the intermittent complaint, should be thoroughly checked for the following conditions:

- Backed out terminals

- Improper mating

- Broken locks

- Improperly formed

- Damaged terminals

- Poor terminal to wiring connections

- Physical damage to the wiring harness

TEST DESCRIPTION

Number(s) below refer to the step number(s) on the Diagnostic Table.

1. The Powertrain OBD System Check prompts the technician to complete some basic checks and store the freeze frame and failure records data on the scan tool it applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored on the scan tool for later reference.

2. This step determines if DTC P0342 is the result of a hard failure or an intermittent condition.

4. Determines if voltage is available to the CMP sensor through the PCM.

5. Determines if voltage is available to the CMP sensor through the PCM.

7. This step checks for a signal from the CMP sensor. It is necessary to supply B+ to the ignition feed #2 terminal in order for the CMP sensor to have B+ supplied to it. While cranking the engine, the CMP sensor will send a B+ signal and then a ground signal as the reluctor passes the sensor.

15. Replacement PCM's must be reprogrammed. Refer to the latest Techline information for programming procedures.