CAMSHAFT POSITION (CMP) SENSOR INSPECTION [LF, L3]

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Note

•  Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart.

Visual Inspection

1.  Remove the battery cover.

2.  Disconnect the negative battery cable.

3.  Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION [LF, L3].)

4.  Disconnect the CMP sensor connector.

5.  Remove the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [LF, L3].)

6.  Verify that there are no metal shavings on the CMP sensor.

•  If there is a malfunction, replace the CMP sensor.

(See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [LF, L3].)

Voltage inspection

1.  Idle the engine.

Caution

•  Water penetrating the connector will cause sensor malfunction. To prevent this, be careful not to damage the wiring harnesses or the waterproof connector so as to cause water penetration.

2.  Measure the output voltage using a oscilloscope.

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•  If not within the specification, replace the CMP sensor.

(See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [LF, L3].)

Circuit Open/Short Inspection

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1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [LF, L3].)

2.  Inspect the following wiring harnesses for open or short. (Continuity check)

Open circuit

•  If there is no continuity, the circuit is open. Repair or replace the harness.

―  CMP sensor terminal A and body ground

―  CMP sensor terminal B and PCM terminal 2S^*1, 2V^*2

―  CMP sensor terminal C and PCM terminal 2AM^*1, 2X^*2

Short circuit

•  If there is continuity, the circuit is shorted. Repair or replace the harness.

―  CMP sensor terminal A and power supply

―  CMP sensor terminal B and power supply

―  CMP sensor terminal B and body ground

―  CMP sensor terminal C and power supply