P0342

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

The Camshaft Position (CMP) Sensor indicates the camshaft position so the Powertrain Control Module (PCM) can determine which cylinder is misfiring when a misfire is present. Whenever the PCM receives an intermittent signal from the CMP, then the CMP Activity Counter will increment. In order to set a DTC, the PCM must see a minimum number of resync's within a maximum time.

CONDITIONS FOR SETTING THE DTC

^ The Engine is running.

^ The Cam Sensor activity counter does not increment.

ACTION TAKEN WHEN THE DTC SETS

^ The Malfunction Indicator Lamp (MIL) will illuminate.

^ The PCM will record the operating conditions at the time that the diagnostic tails. The Freeze Frame and Failure Records buffers will store this information.

^ A history DTC stores.

CONDITIONS FOR CLEARING THE MIL/DTC

^ The MIL will turn off after 3 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.

^ A scan tool can clear the DTCs.

DIAGNOSTIC AIDS

^ A poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation may cause an Intermittent problem.

^ Thoroughly check any circuitry, that is suspected as causing the intermittent complaint, proper mating, broken locks, improperly formed or damaged terminals, or physical damage to the wiring harness.

^ Whenever the PCM sees less than 15 resync's in 256 seconds, the counter resets to 0. Anytime a poor connection is present, the Cam Sensor Reference Activity counter stops incrementing and the Cam Sensor Resync Counter starts to increment.

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 if applicable. This creates an electronic copy of the data taken when the malfunction occurred. The information is then stored on the scan tool for later reference.

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

4. Determines if the 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 positive #2 terminal in order for the CMP sensor to have 8+ supplied to it. While cranking the engine, the CMP sensor will send a 8+ signal and then a ground signal as the reluctor passes the sensor.

15. Replacement PCMs must be reprogrammed and the crankshaft position system variation procedure must be performed. Refer to the latest Techline information for PCM reprogramming and also refer to the Crankshaft Position (CKP) System Variation Learn Procedure for the Crankshaft Position System Variation Procedure.