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Section 390 (Lighting System): Inspection

WARNING: This page is about a different car, the 2004 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. HEADLAMP DIMMER SWITCH ASSY 
    1. Inspect the light control switch continuity.
      1. Check continuity between terminals at each switch position as shown in the chart.
      SPECIFIED TESTER CONDITION

      Switch operation Tester connection Specified condition
      OFF - No continuity
      TAIL 14 - 16 Continuity
      HEAD 13 - 16 - 14 Continuity
      AUTO 16 - 12 Continuity
      Fig 1: Inspecting Light Control Switch Continuity
      G03476401Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the headlamp dimmer switch continuity.
      1. Check continuity between terminals at each switch position as shown in the chart.
      SPECIFIED TESTER CONDITION

      Switch operation Tester connection Specified condition
      FLASH 7 - 8 - 16 Continuity
      LOW BEAM 16 - 17 Continuity
      HI BEAM 7 - 16 Continuity
    3. Inspect the turn signal switch continuity.
      1. Check continuity between terminals at each switch position as shown in the chart.
      SPECIFIED TESTER CONDITION

      Switch operation Tester connection Specified condition
      Right turn 2 - 3 Continuity
      Neutral - No continuity
      Left turn 1 - 2 Continuity
    4. Inspect the front fog lamp switch continuity.
      1. Check continuity between terminals at each switch position as shown in the chart.
      SPECIFIED TESTER CONDITION

      Switch operation Tester connection Specified condition
      OFF - No continuity
      ON 10 - 11 Continuity
      Fig 2: Inspecting Front Fog Lamp Switch
      G03476402Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. HAZARD WARNING SIGNAL SWITCH ASSY 
    1. Check continuity between terminals at each switch position as shown in the chart.
      SPECIFIED TESTER CONDITION

      Switch operation Tester connection Specified condition
      OFF 2 - 3 No continuity
      ON 2 - 3 Continuity
      Illumination circuit 4 - 5 Continuity
    2. Inspect illumination operation.
      1. Connect the battery positive (+) lead to terminal 4 and the battery negative (-) lead to terminal 5, then check that the illumination comes on.
  3. FRONT DOOR COURTESY Lamp SWITCH ASSY 
    1. Inspect courtesy lamp assy continuity.
      1. Check continuity between terminals when the switch is operated.

      Standard: 

      ON (When shaft is pressed): No continuity 

      OFF (When shaft is not pressed): Continuity 

  4. REAR DOOR COURTESY Lamp SWITCH ASSY 
    1. Inspect courtesy lamp assy continuity.
      1. Check continuity between terminal and the switch body when the switch is operated.

      Standard: 

      ON (When shaft is pressed): No continuity 

      OFF (When shaft is not pressed): Continuity 

  5. BACK DOOR COURTESY Lamp SWITCH ASSY 
    1. Inspect courtesy lamp assy continuity.
      1. Check continuity between terminal and the switch body when the switch is operated.

      Standard: 

      ON (When shaft is pressed): No continuity 

      OFF (When shaft is not pressed): Continuity 

  6. GLOVE BOX Lamp SWITCH 
    1. Inspect courtesy lamp assy continuity.
      1. Check continuity between terminals when the switch is operated.

      Standard: 

      ON (When shaft is pressed): No continuity 

      OFF (When shaft is not pressed): Continuity 

  7. Headlamp RELAY 
    1. Inspect relay continuity.

    Standard: 

    SPECIFIED TESTER CONDITION

    Condition Tester connection Specified condition
    Always 1 - 2 Continuity
    Always 3 - 5 No continuity
    Apply +B between terminal 1 and 2 3 - 5 Continuity
    Fig 3: Identifying Hazard Warning Signal Switch Connector
    G03476403Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. TAIL Lamp RELAY 
    1. Inspect relay continuity.

    Standard: 

    SPECIFIED TESTER CONDITION

    Condition Tester connection Specified condition
    Always 1 - 2 Continuity
    Always 3 - 5 No continuity
    Apply +B between terminal 1 and 2 3 - 5 Continuity
    Fig 4: Identifying Tail Lamp Relay
    G03476404Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. FOG Lamp RELAY 
    1. Inspect the relay continuity.
    SPECIFIED TESTER CONDITION

    Condition Tester connection Specified condition
    Always 1 - 2 Continuity
    Always 3 - 5 No continuity
    Apply +B between terminals 1 and 2. 3 - 5 Continuity
    Fig 5: Identifying Fog Lamp Relay
    G03476405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. ROOM Lamp CONTROL RELAY (DOME RELAY) 
    1. Inspect relay continuity.

    Standard: 

    SPECIFIED TESTER CONDITION

    Condition Tester connection Specified condition
    Always 1 - 2 Continuity
    Always 3 - 5 No continuity
    Apply +B between terminal 1 and 2 3 - 5 Continuity
    Fig 6: Identifying Room Lamp Control Relay (Dome Relay)
    G03476406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. PARK/NEUTRAL POSITION SWITCH RELAY (BK/UP RELAY) 
    1. Inspect relay continuity.

    Standard: 

    SPECIFIED TESTER CONDITION

    Condition Tester connection Specified condition
    Always 1 - 2 Continuity
    Always 3 - 5 No continuity
    Apply +B between terminal 1 and 2 3 - 5 Continuity
    Fig 7: Identifying Park/Neutral Position Switch Relay (BK/Up Relay) Connector
    G03476407Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. TOWING CONVERTER RELAY (BATT CHG RELAY) 
    1. Inspect relay continuity.

    Standard: 

    SPECIFIED TESTER CONDITION

    Condition Tester connection Specified condition
    Always 1 - 2 Continuity
    Always 3 - 5 No continuity
    Apply +B between terminal 1 and 2 3 - 5 Continuity
    Fig 8: Identifying Towing Converter Relay (BATT CHG Relay)
    G03476408Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. TOWING CONVERTER RELAY (TOWING TAIL RELAY) 
    1. Inspect relay continuity.

    Standard: 

    SPECIFIED TESTER CONDITION

    Condition Tester connection Specified condition
    Always 1 - 2 Continuity
    Always 3 - 5 No continuity
    Apply +B between terminal 1 and 2 3 - 5 Continuity
    Fig 9: Inspecting Relay
    G03476409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. TRANSPONDER KEY AMPLIFIER 
    1. Connect the battery positive (+) lead to terminal 2 and the battery negative (-) lead to terminal 6, and check that the indicator light comes on.
    Fig 10: Transponder Key amplifier Connector
    G03476410Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. MAP Lamp ASSY 
    1. Inspect map light assy continuity.
      1. Check continuity between terminals at each switch position as shown in the chart.

      Standard: 

      SPECIFIED TESTER CONDITION

      Switch operation Tester connection Specified condition
      OFF - No continuity
      DOOR 7 (+B) - 2 (DOOR) Continuity
      ON 7 (+B) - 4 (E) Continuity
      Fig 11: Identifying Map Lamp Connector
      G03476411Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. ROOM Lamp ASSY NO.1 
    1. Inspect room lamp assy No.1 continuity.
      1. Check continuity between terminals at each switch position as shown in the chart.
      Fig 12: Inspecting Room Lamp
      G03476412Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED TESTER CONDITION

    Switch operation Tester connection Specified condition
    OFF - No continuity
    DOOR 1 - 2 Continuity
    ON 1 - 3 Continuity
    Fig 13: Identifying Room Lamp Assembly Connector
    G03476413Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  17. ROOM Lamp ASSY NO.2 
    1. Inspect room lamp assy No.2 continuity.
      1. Check continuity between terminals at each switch position as shown in the chart.

    Standard: 

    SPECIFIED TESTER CONDITION

    Switch operation Tester connection Specified condition
    OFF - No continuity
    DOOR 1 - 2 Continuity
    ON 1 - 3 Continuity
  18. FRONT DOOR COURTESY Lamp ASSY RH 
    1. Check continuity between terminals.

      Standard: Continuity exists 

  19. FRONT DOOR COURTESY Lamp ASSY LH 
    1. Check continuity between terminals.

      Standard: Continuity exists 

  20. GLOVE BOX Lamp ASSY 
    1. Check continuity between terminals.

      Standard: Continuity exists 

  21. RH VISOR ASSY 
    1. Inspect vanity light continuity.
      1. Check continuity between terminal 1 and 2 when the light is operated.

      Standard: 

      OFF (closed): No continuity 

      ON (opened): Continuity 

  22. LH VISOR ASSY 
    1. Inspect vanity light continuity.
      1. Check continuity between terminal 1 and 2 when the light is operated.

      Standard: 

      OFF (closed): No continuity 

      ON (opened): Continuity 

  23. STOP Lamp SWITCH ASSY 
    1. Check continuity between terminals at each switch position as shown in the chart.

    Standard: 

    SPECIFIED TESTER CONDITION

    Switch position Tester connection Specified condition
    Switch pin free 1-2 No continuity
    Switch pin free 3-4 Continuity
    Switch pin pushed in 1-2 Continuity
    Switch pin pushed in 3-4 No continuity
    Fig 14: Identifying Stop Lamp Switch Connector
    G03476414Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  24. Lamp ASSY, INTERIOR ILLUMINATION, NO.1 

    (Inside Handle Illumination) 

    1. Check continuity between terminal 1 (+B) and 2 (GND).

      Standard: Continuity 

    HINT:

    Connect the positive (+) terminal of the tester to the terminal 1 (+B) of the connector, and the negative (-) terminal of the tester to the terminal 2 (GND) of the connector to check the continuity.

    Fig 15: Identifying Lamp Interior Illumination Connector
    G03476415Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  25. INTERIOR ILLUMINATION Lamp ASSY NO.2 

    (Driver Side Foot Light) 

    1. Check continuity between terminal 1 (+B) and 2 (GND).
      Fig 16: Identifying Interior Illumination Lamp Connector
      G03476416Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: Continuity 

    HINT:

    Connect the positive (+) terminal of the tester to the terminal 1 (+B) of the connector, and the negative (-) terminal of the tester to the terminal 2 (GND) of the connector to check the continuity.

  26. INTERIOR ILLUMINATION Lamp ASSY NO.2 

    (Front Passenger Side Foot Light) 

    1. Check continuity between terminal 1 (+B) and 2 (GND).

      Standard: Continuity 

    HINT:

    Connect the positive (+) terminal of the tester to the terminal 1 (+B) of the connector, and the negative (-) terminal of the tester to the terminal 2 (GND) of the connector to check the continuity.

    Fig 17: Identifying Interior Illumination Lamp Assembly Connector
    G03476417Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  27. STEP Lamp ASSY (RH Side) 
    1. Inspect the side step lamp assy.
      1. Check continuity between terminals when the courtesy lamp switch is operated.

      Standard: 

      ON: Continuity 

      OFF: No continuity 

  28. STEP Lamp ASSY (LH Side) 
    1. (2) Check continuity between terminals when the courtesy lamp switch is operated.

    Standard: 

    ON: Continuity 

    OFF: No continuity