The crankshaft position sensor is mounted on the engine near the crankshaft.
The crankshaft position sensor is a Hall-Effect sensor that senses the crank angle (piston position) of each cylinder and converts it into a pulse signal. The signal from the sensor is relayed to the ECM to indicate engine rpm and the position of the crankshaft.
Removal & Installation
- Disconnect the negative battery cable.
- Disconnect the connector from the sensor.
- Remove the bolt that retains the sensor in place.
- Remove the sensor from its mounting.
- Installation is the reverse of the removal procedure.
- Clearance between the sensor and the sensor wheel should be 0.020-0.059 inch.
- Properly connect the scan tool.
- Start the engine and allow it to idle.
- Be sure the idle position switch is ON.
Specifications are as follows:
Temperature - 4°F, test specification 1500-1700 RPM
- Replace sensor, as required.
- Be sure the ignition switch is OFF.
- Disconnect the sensor connector.
- Using an ohmmeter, measure the resistance between terminal 1 and 2 of the connector (component side).
- Specification should be 630-770 ohms.
- If not within specification substitute a known good sensor and recheck for proper operation. Replace the sensor, if required.
- If within specification, check the waveform signal as follows.
- Be sure the ignition is OFF. Install the scan tool. With the ignition switch in the ON position, measure the waveform signal at terminal 1 or 2 of the sensor.
- If the signal is normal check the connectors for looseness, poor connection, bending, corrosion etc.
- If the signal is not normal, substitute a known good PCM and recheck for proper operation. Replace the PCM, if required.