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Home >> Nissan-Datsun >> 2004 >> Sentra Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - QG18DE >> DTC P0335: CKP Sensor (Pos) >> Diagnostic Procedure

Diagnostic Procedure

  1. RETIGHTEN GROUND SCREWS 
    1. Turn ignition switch OFF.
    2. Loosen and retighten engine ground screws.
      1. GO TO 2.
      Fig 1: Retightening Ground Screws
      G00772805Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK CKP SENSOR (POS) POWER SUPPLY CIRCUIT 
    1. Disconnect crankshaft position (CKP) sensor (POS) harness connector.
    2. Turn ignition switch ON.
      Fig 2: Disconnecting Crankshaft Position (CKP) Sensor (POS) Harness Connector
      G00772806Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check voltage between CKP sensor (POS) harness connector terminal 3 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

    4. Also check harness for short to ground and short to power.

    OK or NG 

    1. OK: GO TO  4.
    2. NG: GO TO 3.
      Fig 3: Checking Voltage Between CKP Sensor (POS) Harness Connector Terminal 3 And Ground
      G00772807Courtesy of NISSAN MOTOR CO., U.S.A.
  3. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness for open or short between crankshaft position sensor (POS) and ECM
    • Harness for open or short between crankshaft position sensor (POS) and ECM relay
      1. Repair open circuit or short to ground or short to power in harness or connectors.
  4. CHECK CKP SENSOR (POS) GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Check harness continuity between CKP sensor (POS) terminal 1 and engine ground.

      Refer to the WIRING DIAGRAM .

      Continuity should exist. 

    3. Also check harness for short to power.

    OK or NG 

    1. OK: GO TO  6.
    2. NG: GO TO 5.
  5. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors F26, M58
    • Harness for open or short between crankshaft position sensor (POS) and ground
      1. Repair open circuit or short to power in harness or connectors.
  6. CHECK CKP SENSOR (POS) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect ECM harness connector.
    2. Check harness continuity between ECM terminal 13 and CKP sensor (POS) terminal 2.

      Refer to WIRING DIAGRAM .

      Continuity should exist. 

    3. Also check harness for short to ground and short to power.

    OK or NG 

    1. OK: GO TO 7.
    2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
  7. CHECK CRANKSHAFT POSITION SENSOR (POS) 

    Refer to COMPONENT INSPECTION .

    OK or NG 

    1. OK: GO TO 8.
    2. NG: Replace crankshaft position sensor (POS).
  8. CHECK GEAR TOOTH 

    Visually check for chipping signal plate gear tooth.

    OK or NG 

    1. OK: GO TO 9.
    2. NG: Replace the signal plate.
  9. CHECK INTERMITTENT INCIDENT 

    Perform TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    1. INSPECTION END 
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