Description & Operation
The CMP sensor detects the position of the camshaft. The CMP sensor identifies when piston No. 1 is on its compression stroke. A signal is then sent to the PCM and used for synchronizing the sequential firing of the fuel injectors. Coil-on-plug (COP) ignition applications use the CMP signal to select the proper ignition coil to fire. The input circuit to the PCM is referred to as the CMP input or circuit. DTC P0340 is associated with this sensor.
Vehicles with 2 CMP sensors are equipped with variable camshaft timing (VCT). They use the second sensor to identify the position of the camshaft on bank 2 as an input to the PCM. DTC P0345 is associated with this sensor and it is referred to as CMP2.
Removal & Installation
- Before servicing the vehicle, refer to the Precautions section.
Disconnect the battery ground cable.
NOTEThe engine appearance cover is equipped with a noise suppressor. If the noise suppressor becomes separated from the engine appearance cover it must be positioned on the intake manifold prior to installing the engine appearance cover.
- Remove the engine appearance cover and the noise suppressor (if detached).
- Disconnect the 2 CMP sensor electrical connectors.
- Remove the ground strap nut and position the ground strap aside.
- Remove the 3 nuts and position the wiring harness conduit aside.
Remove the 2 bolts and the LH and RH CMP sensors.
NOTEInspect and install new O-ring seals as necessary.
NOTELubricate the O-ring seals with clean engine oil.
- To install, reverse the removal procedure.
Before servicing the vehicle, refer to the Precautions section.
WARNINGUse only a high-impedance multimeter, otherwise damage to the PCM and/or sensors can result.
- With the key OFF , disconnect the CMP sensor harness connector.
Measure the resistance of the CMP sensor.
3.0L Engine: 250-1000 ohms
- If the resistance measured is outside the limits given, replace the CMP sensor.