LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2005 >> Murano SL, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P2127, P2128: App Sensor >> Diagnostic Procedure

Diagnostic Procedure

  1. CHECK GROUND CONNECTIONS 
    1. Turn ignition switch OFF.
    2. Loosen and retighten two ground screws on the body. Refer to GROUND INSPECTION .
    Fig 1: Checking Ground Connections
    G02466795Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK: GO TO  2.
    • NG: Repair or replace ground connections.
  2. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I 
    1. Disconnect accelerator pedal position (APP) sensor harness connector.
    2. Turn ignition switch ON.
      Fig 2: Disconnecting Accelerator Pedal Position (APP) Sensor Harness Connector
      G02466796Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check voltage between APP sensor terminal 2 and ground with CONSULT-II or tester.
      • Voltage: Approximately 5 V 

    OK or NG 

    • OK: GO TO  7.
    • NG: GO TO  3.
    Fig 3: Checking Voltage Between APP Sensor Terminal 2 & Ground
    G02466797Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between APP sensor terminal 2 and ECM terminal 91. Refer to WIRING DIAGRAM .
      • Continuity should exist  .

    OK or NG 

    • OK: GO TO  4.
    • NG: Repair open circuit or short to ground or short to power in harness or connectors.
  4. CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-III 

    Check harness for short to power and short to ground, between the following terminals.

    ECM TERMINAL AND SENSOR TERMINAL REFERENCE

    ECM terminal Sensor terminal Reference
    91 APP sensor terminal 2 WIRING DIAGRAM 
    47 Electric throttle control actuator terminal 1 WIRING DIAGRAM 

    OK or NG 

    • OK: GO TO  5.
    • NG: Repair short to ground or short to power in harness or connectors.
  5. CHECK THROTTLE POSITION SENSOR 

    Refer to COMPONENT INSPECTION .

    OK or NG 

    • OK: GO TO  11.
    • NG: GO TO  6.
  6. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR 
    1. Replace electric throttle control actuator.
    2. Perform THROTTLE VALVE CLOSED POSITION LEARNING .
    3. Perform IDLE AIR VOLUME LEARNING .
    • INSPECTION END 
  7. CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between APP sensor terminal 3 and ECM terminal 83. Refer to WIRING DIAGRAM .
      • Continuity should exist  .
    4. Also check harness for short to ground and short to power.

    OK or NG 

    • OK: GO TO  8.
    • NG: Repair open circuit or short to ground or short to power in harness or connectors.
  8. CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check harness continuity between ECM terminal 98 and APP sensor terminal 6. Refer to WIRING DIAGRAM .
      • Continuity should exist. 
    2. Also check harness for short to ground and short to power.

    OK or NG 

    • OK: GO TO  9.
    • NG: Repair open circuit or short to ground or short to power in harness or connectors.
  9. CHECK APP SENSOR 

    Refer to COMPONENT INSPECTION .

    OK or NG 

    • OK: GO TO  11.
    • NG: GO TO  10.
  10. REPLACE ACCELERATOR PEDAL ASSEMBLY 
    1. Replace accelerator pedal assembly.
    2. Perform ACCELERATOR PEDAL RELEASED POSITION LEARNING .
    3. Perform THROTTLE VALVE CLOSED POSITION LEARNING .
    4. Perform IDLE AIR VOLUME LEARNING .
    • INSPECTION END 
  11. CHECK INTERMITTENT INCIDENT 

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    • INSPECTION END 
scientia non olet · About LEMON Manuals