| CAUTION | If ECM replacement is instructed in following testing, always ensure ECM connectors and ground circuits are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction. |
Note. Variable Valve Timing (VVT) sensor may also be referred to as camshaft position sensor.
Note. Bank No. 1 refers to bank which includes cylinder No. 1. Bank No. 2 refers to bank without cylinder No. 1.
Circuit Description
The Variable Valve Timing (VVT) sensor consists of a signal plate and pick-up coil. The signal plate has one tooth and is mounted on intake camshaft. The VVT sensor provides feedback to ECM in order to control intake valve timing. DTC is set when ECM detects a deviation in crankshaft position sensor and VVT sensor. Possible causes are
- Mechanical system malfunction (timing belt stretched of timing belt teeth jumped).
- Defective ECM.
Diagnostic Aids
Using scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected.