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Terminals Of Ecu

  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (BODY ECU) 
    Fig 1: Identifying Instrument Panel Junction Block Assembly Connector Terminals (Body ECU)
    G04967107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the voltage or resistance between the terminals of the connectors.

      Standard 

      TERMINAL SPECIFIED CONDITION REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      BUP (B5-10) - COM (B5-19) Y-R - B-Y
      • Ignition switch ON
      • Back door power window switch UP
      		 Less than 1.5 V
      Back door power window switch OFF More than 5 kΩ
      BDN (B5-8) - COM (B5-19) B-L - B-Y
      • Ignition switch ON
      • Back door power window switch DOWN
      		 Less than 1.5 V
      Back door power window switch OFF More than 5 kΩ
      W/L1 (B6-24) - W/L2 (B6-22) L-Y - L-R Window lock switch ON Less than 1.0 V
      Window lock switch OFF More than 1 kΩ

      If the result is not as specified, the instrument panel J/B assembly (body ECU) malfunctions.

  2. CHECK MULTIPLEX NETWORK DOOR ECU (BACK DOOR ECU) 
    Fig 2: Identifying Multiplex Network Door ECU Connector Terminals (Back Door ECU)
    G04967108Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the voltage or continuity between the terminals of the connectors.

      Standard 

      TERMINAL SPECIFIED CONDITION REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      BDR (B8-4) - Body ground L - Body ground Constant 10 to 14 V
      BECU (B8-S) - Body ground L - R - Body ground Constant 10 to 14 V
      SIG (B8-6) - Body ground B - Body ground Ignition switch OFF Less than 1 V
      Ignition switch ON 10 to 14 V
      SGND (B9-18) - GND (B8-3) G-R - W-B Constant Continuity
      GND (B8-3) - Body ground W-B - Body ground Constant Continuity
      BDUP (B9-13) - BDDN (B9-25) Y-B - R-B Back door power window in close operation 10 to 14 V
      BDDN (B9-25) - BDUP (B9-13) R-B - Y-B Back door power window in open operation 10 to 14 V
      IC+ (B9-11) - IC- (B9-23) Y-G - L-W Constant 6 to 14 V
      IC1 (B9-16) - IC- (B9-23) B-O - L-W Back door power window In operation Pulse generates
      IC2 (B9-17) - IC- (B9-23) W-R - L-W Back door power window in operation Pulse generates
      UP (B9-5) - E (B9-19) V-Y - LG-B Back door lock key cylinder turned right using key Continuity
      DOWN (B9-4) - E (B9-19) GR-R - LG-B Back door lock key cylinder turned left using key Continuity
      E (B9-19) - SGND (B9-18) LG-B - G-R Constant Continuity
      P (B9-12) - SGND (B9-18) P-B - G-R Rear wiper in retract position Less than 1 V

      If the result is not as specified, the multiplex network door ECU back (back door ECU) malfunctions.

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