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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 588 (Engine Control System - Coupe) >> DTC P0340, P0345: CMP Sensor (Phase) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK STARTING SYSTEM 

    Turn ignition switch to START position.

    1. Does the engine turn over? 
    2. Does the starter motor operate? 

    Yes or No 

    1. Yes: GO TO  2.
    2. No: Check starting system. (Refer to STARTING SYSTEM .)
  2. CHECK GROUND CONNECTIONS 
    1. Turn ignition switch OFF.
    2. Loosen and retighten two ground screws on the body. Refer to Ground Inspection .
      Fig 1: Identifying Two Ground Screws On Body (DTC P0340, P0345)
      G02333609Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  3.
    2. NG: Repair or replace ground connections.
  3. CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT 
    1. Disconnect camshaft position (CMP) sensor (PHASE) harness connector.
      Fig 2: Identifying Camshaft Position (CMP) Sensor (PHASE) Harness Connector (DTC P0340, P0345)
      G02333610Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Turn ignition switch ON.
    3. Check voltage between CMP sensor (PHASE) terminal 3 and ground with CONSULT-II or tester.
      1. Voltage: Battery voltage 

    OK or NG 

    1. OK: GO TO  5.
    2. NG: GO TO  4.
    Fig 3: Checking Camshaft Position (CMP) Sensor (PHASE) Power Supply Circuit (DTC P0340, P0345)
    G02333611Courtesy of NISSAN MOTOR CO., U.S.A.
  4. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E12, F3
    • Harness for open or short between CKP sensor (PHASE) and ECM
    • Harness for open or short between CKP sensor (PHASE) and IPDM E/R
      1. Repair open circuit or short to ground or short to power in harness or connectors.
  5. CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Check harness continuity between CMP sensor (PHASE) terminal 1 and ground. Refer to Wiring Diagram.
      1. Continuity should exist. 
    3. Also check harness for short to power.

    OK or NG 

    1. OK: GO TO  7.
    2. NG: GO TO  6.
  6. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors F102, M72
    • Harness for open or short between CMP sensor (PHASE) and ground
      1. Repair open circuit or short to power in harness or connectors.
  7. CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect ECM harness connector.
    2. Check harness continuity between ECM terminal 33 (Bank 1) or 14 (Bank 2) and CMP sensor (PHASE) terminal 2.

      Refer to Wiring Diagram.

      1. Continuity should exist. 
    3. Also check harness for short to ground and short to power.

    OK or NG 

    1. OK: GO TO  8.
    2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
  8. CHECK CAMSHAFT POSITION SENSOR (PHASE) 

    Refer to Component Inspection .

    OK or NG 

    1. OK: GO TO  9.
    2. NG: Replace camshaft position sensor (PHASE).
  9. CHECK CAMSHAFT (INT) 

    Check the following.

    • Accumulation of debris to the signal plate of camshaft rear end
    • Chipping signal plate of camshaft rear end

    OK or NG 

    1. OK: GO TO  10.
    2. NG: Remove debris and clean the signal plate of camshaft rear end or replace camshaft.
    Fig 4: Checking Signal Plate Of Camshaft Rear End
    G02333612Courtesy of NISSAN MOTOR CO., U.S.A.
  10. CHECK INTERMITTENT INCIDENT 

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    1. INSPECTION END 
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