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Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE USING TECHSTREAM (IGNITION SWITCH SIGNAL) 
    1. Use the Data List to check if the ignition switch signal is functioning properly (see DATA LIST / ACTIVE TEST  ).

      Sliding Roof 

      TECHSTREAM SLIDING ROOF - DATA LIST

      Tester Display Test Part Control Range Diagnostic Note
      Ignition (MPX) Ignition switch signal (MPX signal)/ON or OFF ON: Ignition switch ON
      OFF: Ignition switch OFF      		 -
      Ignition (Direct Signal) Ignition switch signal/ON or OFF ON: Ignition switch ON
      OFF: Ignition switch OFF      		 -

      OK: The Techstream displays as shown in the table according to the operation of each switch. 

    NG: Go to step 2 

    OK: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU)  (see DISASSEMBLY  )

  2. INSPECT FUSE (S/ROOF, ECU-IG No. 1) 
    1. Remove the S/ROOF and ECU-IG No. 1 fuses from the main body ECU.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      INSPECT FUSE (S/ROOF, ECU-IG No. 1) RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      S/ROOF fuse Always Below 1 Ω
      ECU-IG No. 1 fuse Always Below 1 Ω

    NG: REPLACE FUSE 

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY AND BODY GROUND) 
    1. Disconnect the W3 ECU connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY AND BODY GROUND) VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      W3-9 (IG) - Body ground Ignition switch ON 11 to 14 V
      W3-9 (IG) - Body ground Ignition switch OFF Below 1 V
      W3-10(B) - Body ground Always 11 to 14 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY AND BODY GROUND) RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      W3-8 (E) - Body ground Always Below 1 Ω
      Fig 1: Identifying W3 ECU Connector Terminals
      G05163325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU)  (see DISASSEMBLY  )

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