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Inspection Procedure

WARNING: This page is about a different car, the 2009 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

The procedure for each door courtesy switch circuit is the same. First, inspect the suspected door courtesy switch circuit.

  1. READ VALUE OF TECHSTREAM (DOOR COURTESY LIGHT SWITCH) 
    1. Check the DATA LIST for proper functioning of the transistor relay.

      Main body ECU 

      MAIN BODY ECU DATA LIST

      Tester Display Measurement Item / Range Normal Condition Diagnostic Note
      D Door Courtesy SW Driver door courtesy switch signal / ON or OFF ON: Driver's door is open
      OFF: Driver's door is closed      		 -
      P Door Courtesy SW Passenger door courtesy switch signal / ON or OFF ON: Passenger's door is open
      OFF: Passenger's door is closed      		 -
      Rear Door Courtesy SW Rear door courtesy switch signal / ON or OFF ON: Either right or left door is open
      OFF: Both the right and left doors are closed      		 -

    OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

    NG : GO TO NEXT STEP 

  2. CHECK DRIVER SIDE JUNCTION BLOCK (BODY ECU) 
    1. Disconnect the 1D junction block connector.
      2. Fig 1: Checking Driver Side Junction Block (Body ECU)
      G04475811Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      1D-21 (DCTY) - Body ground Driver door is open Below 1Ω
      Driver door is closed 10 kΩ or higher
      1D-24 (PCTY) - Body ground Front passenger door is open Below 1Ω
      Front passenger door is closed 10 kΩ or higher
      1D-20 (RCTY) - Body ground Rear RH door is open Below 1Ω
      Rear RH door is closed 10 kΩ or higher
      1D-5 (RCTY) - Body ground Rear LH door is open Below 1Ω
      Rear LH door is closed 10 kΩ or higher

    OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

    NG : GO TO NEXT STEP 

  3. INSPECT DOOR COURTESY LIGHT SWITCH 
    1. Remove the courtesy light switch.
      2. Fig 2: Inspecting Door Courtesy Light Switch
      G04475812Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the switch.

      Standard resistance 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      1 - Body ground OFF 10 kΩ or higher
      ON Below 1Ω

    NG : REPLACE DOOR COURTESY LIGHT SWITCH 

    OK : REPAIR OR REPLACE HARNESS AND CONNECTOR (EACH COURTESY SWITCH CIRCUIT) 

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