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HOMESERVICE MANUALSINFINITI2003FX45REPAIR AND DIAGNOSISTRANSMISSIONTRANSFER CASETROUBLE DIAGNOSISSYSTEM INSPECTIONAWD LOCK SWITCH SIGNAL CIRCUIT
2003 Infiniti FX45

AWD Lock Switch Signal Circuit

2003 Infiniti FX45SECTION AWD Lock Switch Signal Circuit
  1. CHECK CAN COMMUNICATION LINE 

    Perform the self-diagnosis. Is a malfunction in the "CAN COMM CIRCUIT" indication in the results?

    YES or NO

    1. YES: Check the CAN communication line. Refer to "CAN COMMUNICATION SYSTEM ".
    2. NO: GO TO 2.
  2. CHECK AWD LOCK SWITCH SIGNAL 

    WITH CONSULT-II 

    1. Turn ignition switch "ON".
    2. Select "ALL MODE 4WD" with "DATA MONITOR" mode in CONSULT-II.
    3. Is it the same as "4WD MODE SW" indication when operating switch?

    YES or NO

    1. YES: INSPECTION END 
    2. NO: GO TO 3.
      Fig 1: Display Data Monitor
      G03106471Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK AWD LOCK SWITCH 
    1. Turn ignition switch "OFF".
    2. Disconnect AWD lock switch connector.
    3. Check continuity between AWD lock switch connector M33 terminals 1 and 3.
      DISCONNECT AWD LOCK SWITCH CONNECTOR

      Switch position Continuity
      LOCK Yes
      AUTO No

    OK or NG

    1. OK: GO TO 4.
    2. NG: Repair AWD lock switch.
      Fig 2: Checking AWD Lock Switch
      G03106472Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK AWD LOCK SWITCH POWER SUPPLY 
    1. Turn ignition switch "ON".
    2. Check the voltage between the AWD lock switch connector M33 terminal 1 (R/B) and ground.

      1 (R/B) - Ground: Approx. 4V 

    OK or NG

    1. OK: GO TO 5.
    2. NG: GO TO  6.
      Fig 3: Checking AWD Lock Switch Poer Supply
      G03106473Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK GROUND CIRCUIT 
    1. Turn ignition switch "OFF".
    2. Check continuity between the AWD lock switch connector M33 terminal 3 (B) and ground.

      3 (B) - Ground: Continuity should exist. 

    OK or NO

    1. OK: Check the unified meter and A/C amp. Refer to UNIFIED METER & A/C AMP .
    2. NG: Repair or replace the harness or connectors.
      Fig 4: Checking Ground Circuit
      G03106474Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK POWER SOURCE CIRCUIT 
    1. Turn ignition switch "OFF".
    2. Disconnect unified meter and A/C amp. connector.
    3. Check the continuity between the following terminals.
      • Unified meter and A/C amp. harness connector M55 terminal 5 (R/B) and AWD lock switch harness connector M33 terminal 1 (R/B).

        5 (BR/Y) -1 (BR/Y): Continuity should exist. 

    1. OK: Check the unified meter and A/C amp. Refer to UNIFIED METER & A/C AMP .
    2. NG: Repair or replace the harness or connectors.
      Fig 5: Checking Power Source Circuit
      G03106475Courtesy of NISSAN MOTOR CO., U.S.A.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.