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Home >> Lexus >> 2005 >> GX 470 >> Repair and Diagnosis >> Accessories & Equipment >> Collision/Avoidance >> Back Monitor System - Diagnostics >> Courtesy Switch Signal Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT BACK DOOR COURTESY LAMP SWITCH ASSY 
    1. Disconnect the B6 connector from the television camera ECU.
    2. Remove the back door courtesy lamp switch assy.
    3. Measure the resistance according to the value(s) in BACK DOOR COURTESY LAMP SWITCH ASSY .

      Standard: 

      BACK DOOR COURTESY LAMP SWITCH ASSY

      Tester connection Condition Specified condition
      B6-1 - Switch body Back door courtesy lamp switch is free -> pushed Below 1.0 ohms -> 10 k ohms or higher
      Fig 1: Inspecting Back Door Courtesy Lamp Switch Assy
      G02964058Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE BACK DOOR COURTESY LAMP SWITCH ASSY 
    2. OK: Go to next step. 
  2. CHECK HARNESS AND CONNECTOR (BACK DOOR COURTESY LAMP SWITCH ASSY - TELEVISION CAMERA ECU) 
    1. Reconnect the B6 connector.
    2. Install the back door courtesy lamp switch assy.
    3. Disconnect the T18 connector from the television camera ECU.
    4. Measure the resistance according to the value(s) in BACK DOOR COURTESY LAMP SWITCH ASSY - TELEVISION CAMERA ECU .

      Standard: 

      BACK DOOR COURTESY LAMP SWITCH ASSY - TELEVISION CAMERA ECU

      Tester connection (Terminal No.) Condition Specified condition
      BCTY (T18-23) - Body ground Back door courtesy lamp switch is free -> pushed Below 1.0 ohms -> 10 k ohms or higher
      Fig 2: Checking Harness And Connector (Back Door Courtesy Lamp Switch Assy - Television Camera ECU)
      G02964059Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 
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