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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 929 (Interior Lighting System) >> DTC/Circuit Diagnosis >> Interior Room Lamp Control Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK INTERIOR ROOM LAMP CONTROL OUTPUT 

    WITH CONSULT

    1. Switch the front room/map lamp assembly switch to DOOR.
    2. Turn ignition switch ON.
    3. Select "INT LAMP" of BCM (INT LAMP) active test item.
    4. While operating the test item, check voltage between BCM connector M20 terminal 63 and ground.
      (+) (-) INT LAMP Voltage
      Connector Terminal
      M20 63 Ground ON 0V
      OFF Battery voltage
      Fig 1: Checking Voltage Between BCM Connector M20 Terminal 63 And Ground
      G05382658Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: Interior room lamp control circuit is operating normally.

      Fixed ON: GO TO  3

      Fixed OFF: GO TO 2

  2. CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector M20, door mirror connectors (if equipped with puddle lamps) and front room/map lamp assembly connector.
    3. Check continuity between BCM connector M20 (A) terminal 63 and the door mirror connectors (B) terminal 13 and front room/map lamp assembly connector R102 (C) terminal 1.
      BCM Interior room lamp Continuity
      Connector Terminal Component Connector Terminal
      M20 (A) 63 Door mirror LH (if equipped with puddle lamps) D4 (B) 13 Yes
      Door mirror RH (if equipped with puddle lamps) D107 (B) 13
      Front room/map lamp R102 (C) 1
      Fig 2: Checking Interior Room Lamp Control Open Circuit
      G06318304Courtesy of NISSAN NORTH AMERICA, INC.
    4. Reconnect the front room/map lamp assembly connector.
    5. Check continuity between BCM connector M20 (A) terminal 63 and the 2nd and 3rd row personal lamp connectors (B) terminal 1.
      BCM Interior room lamp Continuity
      Connector Terminal Component Connector Terminal
      M20 (A) 63 Personal lamp 2nd row R203 (B) 1 Yes
      Personal lamp 3rd row R205 (B) 1
      Fig 3: Checking Continuity Between BCM Connector M20 Terminal 63 And 2nd And 3rd Row Personal Lamp Connectors Terminal 1
      G05382660Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: Check interior room lamps for an open. If OK, replace BCM. Refer to "REMOVAL AND INSTALLATION ". If NG, replace interior room lamp. Refer to "REMOVAL AND INSTALLATION " or "REMOVAL AND INSTALLATION ".

      NO: Repair the harness or connectors.

  3. CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector M20, door mirror connectors (if equipped with puddle lamps) and 2nd and 3rd row personal lamp connectors.
    3. Switch the front room/map lamp assembly switch to ON position.
    4. Check continuity between BCM connector M20 terminal 63 and ground.
      Connector Terminal - Continuity
      M20 63 Ground No
      Fig 4: Checking Continuity Between BCM Connector M20 Terminal 63 And Ground
      G05382661Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: Check interior room lamps for a short circuit. If OK, replace BCM. Refer to "REMOVAL AND INSTALLATION ". If NG, replace interior room lamp. Refer to "REMOVAL AND INSTALLATION " or "REMOVAL AND INSTALLATION ".

      NO: Repair the harness or connectors.

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