#
CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [MZR-CD (RF Turbo)]

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  Note

  • Perform the following test only when directed.

  Caution

  • When foreign material, such as iron chips, gets on the CKP sensor, it can cause abnormal output from the sensor because of flux turbulence and adversely affect engine control. Be sure there is no foreign material on the CKP sensor when replacing.
  • Do not forcefully pull the wiring harness of the CKP sensor. Doing so will break the harness.

## Visual Inspection

1. Verify that the CKP sensor and the pulsar are free of any metallic shavings or particles.

  • If any are found on the CKP sensor and the pulsar, clean them off.

## 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.

  • If not within the specification, replace the CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)

CKP sensor voltage

Terminal | Voltage (V) | Condition
--- | --- | ---
A | 1.0 or less | Low output
4.0 or more | High output
B | 0 | Under any condition
C | 5 | Under any condition

## Circuit Open/Short Inspection

1. Inspect for open/short circuit in the following wiring harnesses.

  • If there is open/short circuit, repair or replace wiring harnesses.

### Open circuit

  • CKP sensor terminal A and PCM terminal 46
  • CKP sensor terminal B and PCM terminal 65
  • CKP sensor terminal C and PCM terminal 45

### Short circuit

  • CKP sensor terminal A and Power Supply
  • CKP sensor terminal A and body ground
  • CKP sensor terminal B and Power Supply
  • CKP sensor terminal C and Power Supply
  • CKP sensor terminal C and body ground