CAMSHAFT POSITION (CMP) SENSOR INSPECTION [WL-C, WE-C]

id0140b7801400

Note
•  Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. (See HOW TO USE THIS MANUAL.)

Visual Inspection

1.  Remove the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [WL-C, WE-C].)

2.  Verify that there are no metal shavings on the sensor.

3.  Install the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [WL-C, WE-C].)


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.

absggw00001287

•  If not within the specification, replace the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [WL-C, WE-C].)
•  if there is an open or short circuit, repair or replace wiring harnesses.

CMP sensor voltage

Terminal

Voltage (V)

Condition
A
approx. 0
Under any condition
B
approx. 5
High output*
approx. 0
Low output*
C
approx. 5
Under any condition

*  :Output voltage varies with camshaft rotation.


Circuit Open/Short Inspection

1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [WL-C, WE-C].) (See PCM REMOVAL/INSTALLATION (U.K. Specs.) [WL-C, WE-C].)

2.  Disconnect the CMP sensor connector.

3.  Inspect the following wiring harness for open or short circuit (continuity check).

•  if there is an open or short circuit, repair or replace wiring harnesses.
absggw00001287
absggw00001288


Open circuit

•  Power circuit (CMP sensor connector terminal C and PCM connector terminal 129)
•  Signal circuit (CMP sensor connector terminal B and PCM connector terminal 160)
•  Ground circuit (CMP sensor connector terminal A and PCM connector terminal 114)


Short circuit

•  CMP sensor connector terminal A and PCM connector terminal 114 short to body ground
•  CMP sensor connector terminal B and PCM connector terminal 160 short to power supply
•  CMP sensor connector terminal B and PCM connector terminal 160 short to body ground
•  CMP sensor connector terminal C and PCM connector terminal 129 short to power supply