Component Tests and General Diagnostics

CAMSHAFT POSITION (CMP) SENSOR INSPECTION

Visual Inspection
1. Remove the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION.)
2. Make sure that the CMP sensor is free of any metallic shavings or particles.
- If metallic shavings or particles are found on the sensor, clean them off.

3. Install the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION.)

Wave Profile Inspection
1. Remove the PCM. (See PCM REMOVAL/INSTALLATION.)
2. Connect WDS or equivalent to DLC-2 connector.




3. Connect oscilloscope testleads to the following PCM connector terminals.
- (+) lead: PCM terminal 3V
- (-) lead: PCM terminal 4A

4. Start the engine.
5. Monitor RPM PID.
6. Inspect wave profile when idling engine.




- If wave profile or voltage are out of specifications, carry out the "Circuit Open/Short Inspection"
- PCM terminal: 3V (+) <-> 4A (-)
- Oscilloscope setting: 2.0 V/DIV (Y), 20 ms/DIV (X), DC range
- Vehicle condition: Idling

Circuit Open/Short Inspection
1. Remove the PCM. (See PCM REMOVAL/INSTALLATION.)




2. Inspect the following wiring harnesses for an open or short circuit by probing the applicable sensor and PCM terminals with ohmmeter leads.
- If there is an open or short circuit, repair or replace wiring harnesses.
- If there is no open or short circuit, replace the CMP sensor.

Open circuit
- CMP signal circuit (CMP sensor connector terminal B and PCM connector terminal 3V)
- Power circuit (CMP sensor connector terminal A and main relay terminal D through common connector)
- GND circuit (CMP sensor connector terminal C and PGM connector terminal 4A)

Short circuit
- CMP signal circuit (CMP sensor connector terminal B and PCM connector terminal 3V to GND)
- Power circuit (CMP sensor connector terminal A and main relay terminal D through common connector to GND)

3. Reconnect the CMP sensor connector.
4. Inspect the protrusion of camshaft (intake side) for damage and cracks.