Component Tests and General Diagnostics
CAMSHAFT POSITION (CMP) SENSOR INSPECTIONCAUTION: When foreign material such as an iron chip is on the CMP sensor, it can cause abnormal output from the sensor because of flux turbulence and adversely affect the engine control. Be sure there is no foreign material on the CMP sensor when replacing.
NOTE: Perform the following inspection only when directed.
Resistance Inspection
1. Disconnect the CMP sensor connector.
2. Measure the resistance between CMP sensor terminals A and B using an ohmmeter.
- If not as specified, replace the CMP sensor.
- If CMP sensor resistance is normal, perform the "Circuit Open/Short Inspection".
Specification
400 - 550 ohms
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Inspect the following wiring harnesses for open or short circuit. (Continuity check)
Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- CMP sensor terminal A and PCM terminal 2*1, 2M*2
- CMP sensor terminal B and PCM terminal 28*1, 2J*2
Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- CMP sensor terminal A and power supply
- CMP sensor terminal A and body GND
- CMP sensor terminal B and power supply
- CMP sensor terminal B and body GND
*1 : California emission regulation applicable ATX model
*2 : Except for California emission regulation applicable ATX model