| CAUTION | If ECM replacement is instructed in following tests, always ensure ECM connectors and ground circuits are okay. If either are defective, repair and repeat testing to confirm ECM malfunction. |
Note. For component location, see appropriate illustration in THEORY & OPERATION article.
Circuit Description
Camshaft Position (CMP) sensor (G2 signal) consist of a signal plate and pick-up coil. G2 signal plate has one tooth on its outer circumference and is mounted on intake camshaft. DTC is set when no cranking or engine running signal is received by ECM from CMP sensor. Possible causes are
- CMP sensor circuit is open or shorted.
- Defective CMP sensor.
- Defective signal plate.
- Defective ECM.
Diagnostic Aids
Using Toyota hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected.