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Terminals Of Ecu

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY (MULTIPLEX NETWORK BODY ECU) 
    Fig 1: Identifying Driver Side Junction Block Assembly (Multiplex Network Body ECU) Connector Terminals
    G04412565Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 1A, 1C, 1F, 1H, 1I and 1K driver side J/B connectors.
    2. Disconnect the B5 multiplex network body ECU connectors.
    3. Measure the voltage and resistance of each of the wire harness side connectors.

      Standard: 

      TERMINAL REFERENCE TABLE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ALTB (1A-6) - Body ground L - Body ground +B (power system, generator system) power supply Always 10 to 14 V
      ECUB (1C-16) - Body ground R - Body ground +B (ECUB) power supply Always 10 to 14 V
      GND (1H-18) - Body ground W-B - Body ground Ground Always Below 1
      KSW (1K-10) - Body ground G-B - Body ground Key unlock warning switch input No key in ignition key cylinder 10 k or higher
      Key inserted in ignition key cylinder Below 1
      DCTY (1F-7) - Body ground G-Y - Body ground Driver side courtesy switch input Driver side door closed 10 k or higher
      Driver side door open Below 1
      PCTY (1I-8) - Body ground R-B - Body ground Passenger side courtesy switch input Passenger side door closed 10 k or higher
      Passenger side door open Below 1
      L1 (1I-7) - Body ground
      L1 (1I-18) - Body ground      		 L-W - Body ground Door control switch (master switch and passenger side switch) lock input Door control switch (master switch or passenger side switch) OFF 10 k or higher
      Door control switch (master switch or passenger side switch) LOCK Below 1
      UL1 (1I-3) - Body ground
      UL1 (1I-1) - Body ground      		 GR - Body ground Door control switch (master switch and passenger side switch) lock input Door control switch (master switch or passenger side switch) OFF 10 k or higher
      Door control switch (master switch or passenger side switch) UNLOCK Below 1
      LSWD (B5-20) - Body ground W-R - Body ground Driver side door lock position switch input Driver side door UNLOCK 10 k or higher
      Driver side door LOCK Below 1
      LSWP (B5-11) - Body ground B-W - Body ground Driver side door lock position switch input Driver side door UNLOCK 10 k or higher
      Driver side door LOCK Below 1
      L2 (1I-17) - Body ground V - Body ground Driver side door key-linked door lock input Driver side door key cylinder OFF 10 k or higher
      Driver side door key cylinder LOCK Below 1
      L2 (1I-4) - Body ground V - Body ground Passenger side door key-linked door lock input Passenger side door key cylinder OFF 10 k or higher
      Passenger side door key cylinder LOCK Below 1
      UL3 (B5-23) - Body ground G-B - Body ground Driver side door key-linked door unlock input Driver side door key cylinder OFF 10 k or higher
      Driver side door key cylinder UNLOCK Below 1
      UL2 (1I-19) - Body ground P - Body ground Passenger side door keylinked door unlock input Passenger side door key cylinder OFF 10 k or higher
      Passenger side door key cylinder UNLOCK Below 1

      If the result is not as specified, there may be a malfunction on the wire harness side.

    4. Reconnect the 1A, 1C, 1F, 1H, 1I and 1K J/B connectors.
    5. Reconnect the B5 multiplex network body ECU connectors.
    6. Measure the voltage of the connectors.

      Standard: 

      TERMINAL REFERENCE TABLE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ACT+ (1H-24) - Body ground
      ACT+ (1H-23) - Body ground
      ACT+ (1F-1) - Body ground
      ACT+ (1H-22) - Body ground      		 L-R - Body ground Door lock motor LOCK drive output (all doors) Door control switch (master switch or passenger side switch) or door key cylinder (driver or passenger side) OFF Below 1 V
      Door control switch (master switch or passenger side switch) or door key cylinder (driver or passenger side) LOCK 10 to 14 V
      ACTD (B5-3) - Body ground L-B - Body ground Door lock motor UNLOCK drive output (driver side doors) Door control switch (master switch or passenger side switch) or door key cylinder (driver or passenger side) OFF Below 1 V
      Door control switch (master switch or passenger side switch) or door key cylinder (driver or passenger side) LOCK 10 to 14 V
      ACT- (1H-5) - Body ground
      ACT- (1F-2) - Body ground
      ACT- (1H-4) - Body ground      		 L-B - Body ground Door lock motor LOCK drive output (passenger and rear LH and rear RH side door) Door control switch (master switch or passenger side switch) or door key cylinder (driver or passenger side) OFF Below 1 V
      Door control switch (master switch or passenger side switch) or door key cylinder (driver or passenger side) LOCK 10 to 14 V

      If the result is not as specified, the multiplex network body ECU may have a malfunction.

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