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Terminals Of Ecu

  1. MULTIPLEX NETWORK BODY ECU 
    1. Check the body ECU.
      1. Disconnect the body ECU connectors B9 and B12.
      2. Check the voltage or continuity of each terminal of the vehicles side connectors.
        Fig 1: Multiplex Network Body ECU Terminals
        G02909781Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SYMBOLS SPECIFIC CONDITION CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    GND1 (B12-7) <=> Body ground W-B <=> - Constant Continuity
    GND2 (B9-2) <=> Body ground W-B <=> - Constant Continuity
    BECU (B12-9) <=> GND1 (B12-7) G <=> W-B Constant 10-14V
    BDR1 (B12-5) <=> GND1 (B12-7) B <=> W-B Constant 10 - 14V

    HINT:

    If the value is not as specified, the vehicles side may be defective.

  2. POWER WINDOW REGULATOR MASTER SWITCH ASSY (DOOR ECU) 
    1. Check the master switch.
      1. Disconnect the master switch connector.
      2. Check the voltage or continuity of each terminal of the vehicles side connector.
        Fig 2: Identifying Power Window Regulator Master Switch Assy (Door ECU) Terminals
        G02909782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SYMBOLS SPECIFIC CONDITION CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    GND (P5-2) <=> Body ground W-B <=> - Constant Continuity
    CPUB (P5-9) <=> GND (P5-2) L <=> W-B Constant 10 - 14V
    BDR (P5-10) <=> GND (P5-2) G <=> W-B Constant 10 - 14V

    HINT:

    If the value is not as specified, the vehicles side may be defective.

  3. COMBINATION METER ASSY (METER ECU) 
    1. Check the meter.
      1. Disconnect the meter connector C11.
      2. Check the voltage or continuity of each terminal of the vehicles side connector.
        Fig 3: Identifying Combination Meter Assy (Meter ECU) Connector Terminals
        G02909783Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SYMBOLS SPECIFIC CONDITION CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    E2 (C11-22) <=> Body ground W-B <=> - Constant Continuity
    B (C11-2) <=> E2(C11-22) L-G <=> W-B Constant 10-14V
    B2 (C11-12) <=> E2(C11-22) V<=> W-B Constant 10-14V

    HINT:

    If the value is not as specified, the vehicles side may be defective.

  4. AIR CONDITIONER AMPLIFIER ASSY (A/C ECU) 
    1. Check the air conditioner amplifier.
      1. Disconnect the air conditioner amplifier connector A10.
      2. Check the voltage or continuity of each terminal of the vehicles side connector.
        Fig 4: Identifying Air Conditioner Amplifier Assy (A/C ECU) Connector Terminals
        G02909784Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SYMBOLS SPECIFIC CONDITION CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    GND (A10-11) <=> Body ground W-B <=> - Constant Continuity
    +B(A10-12) <=> GND (A10-11) W <=> W-B Constant 10-14V

    HINT:

    If the value is not as specified, the vehicles side may be defective.

  5. THEFT WARNING ECU ASSY (THEFT DETERRENT ECU) 
    1. Check the theft warning ECU.
      1. Disconnect the connector.
      2. Check the voltage or continuity of each terminal of the vehicles side connector.
        Fig 5: Identifying Theft Warning ECU Assy (Theft Deterrent ECU) Connector Terminals
        G02909785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SYMBOLS SPECIFIC CONDITION CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    E (T4-29) <=> Body ground W-B <=> - Constant Continuity
    +B1 (T4-2) <=> E (T4-29) O <=> W-B Constant 10-14V
    +B2 (T4-3) <=> E (T4-29) L <=> W-B Constant 10-14V
  6. ECM 
    1. Inspect the ECM operation.
      1. Check the voltage or continuity of each terminal of the vehicles side connectors.
    NOTE:
    • The inspection should be started from the back side of the connector with the ECM connector being connected.
    • Before the measurement, check the power source voltage (10-14 V when IG ON) and body ground (5 Ω. or less between each ground terminal and the engine body, when IG OFF).
      Fig 6: Identifying ECM Connector Terminals
      G02909786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SYMBOLS SPECIFIC CONDITION CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    BATT (E5-3) <=> E1 (E9-1((1))) B-W <=> BR Constant 9 - 14 V
    +B (E5-7) <=> E1 (E7-1((2))) W <=> BR Engine stopped, ignition switch ON 9 - 14 V
    +B (E5-2) <=> E1 (E9-1P), E7-1((2))) W <=> BR Engine stopped, ignition switch ON 9 - 14 V
    E1 (E9-1)(1) <=> Body ground BR <=> - Continuity Constant
    E7 (E7-1)(2) <=> Body ground BR <=> - Continuity Constant
    (1) 2AZ-FE
    (2) 3MZ-FE
  7. SLIDING ROOF DRIVE GEAR SUB-ASSY (SLIDING ROOF ECU) 
    1. Check the sliding roof ECU.
      1. Disconnect the sliding roof ECU connector.
      2. Check the voltage or continuity between each terminal of the vehicles side connectors.
        Fig 7: Identifying Sliding Roof Drive Gear Sub-Assy (Sliding Roof ECU) Connector Terminal
        G02909787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SYMBOLS SPECIFIC CONDITION CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    E (S20-7) <=> Body ground W-B <=> - Constant Continuity
    +B (S20-1) <=> E (S20-7) L <=> W-B Constant 10 - 14 V
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