P0340

CIRCUIT DESCRIPTION

Camshaft Position Sensor (CMP) Sensor Circuit Schematic:

The PCM uses the Camshaft Position (CMP) sensor signal to determine the position of the valve train in relation to the engine cylinders. The PCM uses the CMP signal to sequence the ignition system, and the fuel injectors.

The PCM supplies power and ground to the CMP sensor. The CMP sensor returns a signal pulse in response to the reluctor track, located on the camshaft sprocket. If during operation, the PCM detects a loss of CMP sensor signal, DTC P0340 will set.

CONDITIONS FOR RUNNING THE DTC
No CKP sensor DTCs set with engine running more than 400 rpm.

CONDITIONS FOR SETTING THE DTC
The PCM detects a loss of CMP sensor signal.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM illuminates the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the diagnostic test runs and fails.
^ The PCM stores the conditions present when the DTC set as Freeze Frame and Fail Records data.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The PCM will turn the MIL OFF after the third consecutive trip in which the diagnostic runs and passes.
^ The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using the scan tool Clear DTC Information function.

DIAGNOSTIC AIDS

NOTE: Refer to Connector Test Adapter Kit J 35616-A Notice in Service Precautions.

If the condition is intermittent, refer to Intermittent Conditions in Symptoms. Intermittent Conditions

Ignition system DTCs set with the ignition switch in the START position if the starter relay or the starter is inoperative. When the PCM enables starter operation, the PCM also initiates the diagnostic test routines for DTCs P0335, P0340, and P0385. If a condition exists which prevents the engine from cranking, the PCM will not receive signal input from the CKP and CMP sensors, and the DTCs will set.

If DTC P0615 is set, diagnose DTC P0615 first. If DTC P0335, P0340, and/or P0385 are set and no trouble is found, check for the following:
^ Is there a no-crank condition or an intermittent no-crank condition?
^ Was an attempt made to crank the engine with the shift lever not in P/N?

TEST DESCRIPTION

Steps 1 - 9:

Steps 10 - 11: