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Rear Door Courtesy Switch Circuit [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Main Body / Data List.
    5. Read the display on the Techstream.
      MAIN BODY

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RR Door Courtesy SW Rear door courtesy light switch RH signal/ON or OFF ON: Rear door RH open
      OFF: Rear door RH closed
      -
      RL Door Courtesy SW Rear door courtesy light switch LH signal/ON or OFF ON: Rear door LH open
      OFF: Rear door LH closed
      -

      OK

      Normal conditions listed above are displayed.

      Result

      Result Proceed to
      OK A
      Rear door courtesy light switch LH or RH does not operate B

    B → See step   2 

    A → See step   5 

  2. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH) 
    1. Remove the rear door courtesy light switch assembly. Refer to REMOVAL [08/2013 - ] .
    2. Inspect the rear door courtesy light switch assembly. Refer to INSPECTION [08/2013 - ] .

      OK

      Rear door courtesy light switch assembly is normal.

      Result

      Result Proceed to
      OK (for Rear LH) A
      OK (for Rear RH) B
      NG C

    B → See step   4 

    C → See step   7 

    A: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (FOR LH) - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the H11 main body ECU (multiplex network body ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P8-1 - H11-3 (LCTY) Always Below 1 Ω
      P8-1 - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   6 

  4. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (FOR RH) - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the H10 main body ECU (multiplex network body ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Q13-1 - H10-6 (RCTY) Always Below 1 Ω
      Q13-1 - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   6 

  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2013 - ]  
  6. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [08/2013 - ] 
  7. REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY. Refer to  REMOVAL [08/2013 - ]