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Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK INSTRUMENT PANEL J/B ASSEMBLY (DRIVER SIDE J/B) (MULTIPLEX NETWORK BODY ECU) 
    Fig 1: Identifying 2C, 2F, 2J, 2K J/B ECU Connectors
    G05132145Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 2C, 2F, 2J, 2K J/B connectors.
    2. Disconnect the B6, B7, B8 and B9 ECU connectors.
    3. Measure the voltage and resistance of the wire harness side connectors.
      CONNECTOR TERMINAL VOLTAGE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ALTB (2C-30) - Body ground L-W - Body ground +B (power system, generator system) power supply Always 10 to 14 V
      BECU (2F-7) - Body ground W-R - Body ground +B (BECU) power supply Always 10 to 14 V
      GND1 (2F-16) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND2 (2K-17) - Body ground W-B - Body ground Ground Always Below 1 Ω
      KSW (B6-21) - Body ground L - Body ground Key unlock warning switch input 1: No key in ignition key cylinder →
      2: Key inserted      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      DBKL (B8-9) - Body ground BR-Y(1) - Body ground Driver side seat belt buckle switch input Driver side seat belt
      1: Not fastened →
      2: Key inserted      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      DBKL (B8-9) - Body ground G-Y(2) - Body ground Driver side seat belt buckle switch input Driver side seat belt
      1: Not fastened →
      2: Key inserted      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      HCTY(3) (B9-10) - Body ground B - Body ground Engine hood courtesy switch input Engine hood
      1: Closed →
      2: Open      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      DCTY (B8-14) - Body ground R-G - Body ground Driver side courtesy switch input Driver side door
      1: Closed →
      2: Open      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      PCTY (B7-23) - Body ground R-G - Body ground Passenger side courtesy switch input Passenger side door
      1: Closed →
      2: Open      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      LGCY (B7-25) - Body ground G-R(1) - Body ground Luggage compartment door courtesy switch input Luggage compartment door
      1: Closed →
      2: Open      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      LGCY (B7-25) - Body ground R(2) - Body ground Luggage compartment door courtesy switch input Luggage compartment door
      1: Closed →
      2: Open      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      L1 (2K-25) - Body ground
      L1 (2J-3) - Body ground      		 R-Y(1) - Body ground Door control switch (master switch and passenger side switch) lock input Door control switch (master switch or passenger side switch)
      1:OFF →
      2: LOCK      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      L1 (2K-25) - Body ground
      L1 (2J-3) - Body ground      		 LG(2) - Body ground Door control switch (master switch and passenger side switch) lock input Door control switch (master switch or passenger side switch)
      1:OFF →
      2: LOCK      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      UL1 (2K-22) - Body ground
      UL1 (2J-4) - Body ground      		 G-R - Body ground Door control switch (master switch and passenger side switch) unlock input Door control switch (master switch or passenger side switch)
      1: OFF →
      2: UNLOCK      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      LSWD (B8-7) - Body ground BR-R(1) - Body ground Driver side door lock position switch input Driver side door
      1: Unlocked →
      2: Locked      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      LSWD (B8-7) - Body ground LG-R(2) - Body ground Driver side door lock position switch input Driver side door
      1: Unlocked →
      2: Locked      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      LSWP (B7-27) - Body ground Y - Body ground Passenger side door lock position switch input Passenger side door
      1: Unlocked →
      2: Locked      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      L2 (2K-26) - Body ground LG(1) - Body ground Driver side door key-linked door lock input Driver side door key cylinder
      1:OFF →
      2: LOCK      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      L2 (2K-26) - Body ground L-Y(2) - Body ground Driver side door key-linked door lock input Driver side door key cylinder
      1:OFF →
      2: LOCK      		 1: 10 kΩ or higher →
      2: Below 1 Ω
      UL3 (B8-8) - Body ground L - Body ground Driver side door key-linked door unlock input Driver side door key cylinder
      1: OFF →
      2: UNLOCK      		 1: 10 kΩ or higher →
      2: Below 1 Ω.
      (1) Coupe
      (2) Convertible
      (3) with Theft Deterrent System

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

    4. Reconnect the 2D, 2F, 2J, 2K and 2M J/B connectors.
    5. Reconnect the B6, B7, B8 and B9 ECU connectors.
    6. Measure the voltage of the connectors.

      Standard voltage: 

      STANDARD VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ACT+ (2K-2) - Body ground
      ACT+(2F-11)(1) - Body ground      		 L-Y(1) - Body ground Door lock motor LOCK drive output (driver and passenger side doors) Door control switch (master switch or passenger side switch) or driver side door key cylinder
      1: OFF →
      2: LOCK →
      3: OFF      		 1: Below 1V →
      2: 10 to 14V →
      3: Below 1 V
      ACT+ (2K-2) - Body ground
      ACT+(2J-1)(2) - Body ground      		 L-R(2) - Body ground Door lock motor LOCK drive output (driver and passenger side doors) Door control switch (master switch or passenger side switch) or driver side door key cylinder
      1:OFF →
      2: LOCK →
      3: OFF      		 1: Below 1V →
      2:10 to 14 V →
      3: Below 1 V
      ACTD (B8-4) - Body ground L-B - Body ground Door lock motor UNLOCK drive output (driver side door) Door control switch (master switch or passenger side switch) or driver side door key cylinder
      1: OFF →
      2: LOCK →
      3: OFF      		 1: Below 1V →
      2: 10 to 14 V →
      3: Below 1 V
      ACT- (2J-2) - Body ground L-B - Body ground Door lock motor UNLOCK drive output (passenger side door) Door control switch (master switch or passenger side switch) or driver side door key cylinder
      1: OFF →
      2: LOCK →
      3: OFF      		 1: Below 1 V →
      2:10 to 14 V →
      3: Below 1 V
      TR+ (B6-1) - Body ground W-L - Body ground Luggage compartment door lock motor OPEN drive output Transmitter switch (luggage compartment door)
      1: OFF →
      2: ON →
      3: OFF      		 1: Below 1V →
      2:10 to 14 V →
      3: Below 1 V
      (1) Coupe
      (2) Convertible

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

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