P0340

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

The Camshaft Position (CMP) sensor is used to indicate the camshaft position. The VCM uses the CMP sensor in order to determine which cylinder is misfiring. This DTC is also used to check for a properly installed High Voltage switch.

CONDITIONS FOR SETTING THE DTC

The engine is running

ACTION TAKEN WHEN THE DTC SETS

The VCM will turn ON the MIL after 2 consecutive driving cycles with the fault active.

CONDITIONS FOR CLEARING THE MIL/DTC

^ The VCM turns the MIL OFF after 3 consecutive drive trips when the test has Pun and Passed and not Failed.

^ A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles (coolant temperature has risen 22°C (40°F) from the startup coolant temperature and the engine coolant temperature exceeds 70°C (160°F) during the same ignition cycle).

^ Use the scan tool Clear Information function.

^ Disconnect the VCM battery feed for 30 seconds.

DIAGNOSTIC AIDS

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

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 or damaged terminals

^ Poor terminal to wiring connections or

^ Physical damage to the wiring harness.

Refer to Symptoms. Testing and Inspection

TEST DESCRIPTION

The numbers below refer to the step numbers in the diagnostic table.

2. This step determines if the DTC P0340 is the result of a hard failure or an intermittent condition.

3. Determines it the voltage is available to the CMP through the VCM.

4. If the feed circuit is shorted to ground, the test lamp will be ON. This step determines if the circuit is open or shorted to ground. If the circuit is OK, then the VCM connections or VCM is faulty.