LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2003 >> Highlander Limited, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Body Multiplex Communication System - Diagnostics >> Terminals Of Ecu

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 vehicle's side connectors.
        Fig 1: Identifying Body ECU Connector Terminals
        G02828714Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    MULTIPLEX NETWORK BODY ECU SPECIFICATIONS

    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) W-L < > W-B Constant 10 - 14 V
    BDR1 (B12-5) < > GND1 (B12-7) R-B < > W-B Constant 10 - 14 V
    BDR2 (B9-4) < > GND1 (B12-7) W-L W-B Constant 10 - 14 V
    NOTE: If the value is not as specified, the vehicle's side may be defective.
    Fig 2: Identifying Power Window Regulator Master Switch Assy (Door ECU) Connector Terminals
    G02828715Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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 vehicle's side connector.

    Standard: 

    DOOR ECU VOLTAGE & CONTINUITY

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    GND (P5-2) <--> Body ground W-B <--> - Constant Continuity
    CPUB (P5-9) <--> GND (P5-2) W-L <--> W-B Constant 10 - 14 V
    BDR (P5-10) <--> GND (P5-2) L-W <--> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified, the vehicle's 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 vehicle's side connector.
    Fig 3: Identifying Combination Meter Assembly (Meter ECU) Connector Terminals
    G02828716Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    METER ECU VOLTAGE & CONTINUITY

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    E2 (C11-22) <--> Body ground W-B <--> - Constant Continuity
    B (C11-2) <--> E2 (C11-22) W-L <--> W-B Constant 10 - 14 V
    B2 (C11-12) <--> E2 (C11-22) V<--> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified, the vehicle's 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 vehicle's side connector.
      Fig 4: Identifying Air Conditioner Amplifier Assembly (A/C ECU) Connector Terminals
      G02828717Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

    A/C ECU VOLTAGE & CONTINUITY

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    GND (A10-11)<--> Body ground W-B <--> - Constant Continuity
    +B (A10-12) <--> GND (A10-11) W-L <--> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified, the vehicle's 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 vehicle's side connector.
      Fig 5: Identifying Theft Warning ECU Assembly (Theft Deterrent ECU) Connector Terminals
      G02828718Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

    WARNING ECU VOLTAGE & CONTINUITY

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    E (T4-11) <--> Body ground W-B <--> - Constant Continuity
    +B1 (T4-2)<--> E (T4-11) W-L <--> W-B Constant 10 - 14 V
  6. ECM 
    1. Inspect the ECM operation.
      1. Check the voltage or continuity of each terminal of the vehicle's 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 Q. or less between each ground terminal and the engine body, when IG OFF).
      Fig 6: Identifying ECM Connector Terminals
      G02828719Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

    ECM VOLTAGE & CONTINUITY

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    BATT (E5-1) <--> E1 (E8-17) B-W <--> BR Constant 9 - 14 V
    +B (E5-16) <--> E1 (E8-17) W<-->BR Engine stopped, ignition switch ON 9 - 14 V
    E1 (E8-17) <--> Body ground BR<--> - Continuity Constant
  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 vehicle's side connectors.
      Fig 7: Identifying Sliding Roof ECU Connector Terminals
      G02828720Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SLIDING ROOF ECU VOLTAGE & CONTINUITY

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    E (S20-7) <--> Body ground W-B <--> - Constant Continuity
    +B (S20-5) <--> E (S20-7) L<--> W-B Constant 10 - 14 V
scientia non olet · About LEMON Manuals