Description & Operation
The CMP sensor detects the position of the camshaft. The CMP sensor identifies when piston number 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 correct ignition coil to fire.
There are 2 types of CMP sensors: the 3-pin connector Hall-effect type sensor and the 2-pin connector variable reluctance type sensor.
Removal & Installation
- Camshaft position sensor electrical connector
- CMP sensor bolt
- CMP sensor
- Disconnect the battery ground cable.
- Disconnect the camshaft position (CMP) sensor electrical connector.
- Remove the CMP bolt.
- Remove the CMP sensor.
- To install, reverse the removal procedure, and tighten CMP bolt to 89inch lbs. (10 Nm).
Before testing, it is necessary to determine if the CMP Sensor is a 2-pin VR type, or a 3-pin Hall-effect Type.
CMP Sensor Pin Testing
This pinpoint test is intended to diagnose the following: