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Terminals Of Ecu

  1. CHECK DRIVER SIDE J/B (DRIVER SIDE J/B ECU) 
    1. Disconnect the J/B connectors D4 and 2G.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 1: Identifying Terminals Of ECU
    G03387073Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (2G-8) - Body ground W-B- <=> Body ground Constant Continuity
    GND2 (D4-1) - Body ground W-B <=> Body ground Constant Continuity
    MPX-B (D4-5) - GND (2G-8) L-B <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  2. CHECK PASSENGER SIDE J/B (PASSENGER SIDE J/B ECU) 
    1. Disconnect the J/B connectors 3E, 3G and P4.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 2: Identifying Passenger Side J/B Passenger Side J/B ECU Terminals
    G03387074Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (3G-7) - Body ground W-B <=> Body ground Constant Continuity
    GND1 (P4-1) - Body ground W-B <=> Body ground Constant Continuity
    MPX-B (3E-16) - GND (3G-8) W-B <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  3. CHECK LUGGAGE ROOM J/B (LUGGAGE ROOM J/B ECU) 
    1. Disconnect the J/B connectors 6F, 6J and L24.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 3: Identifying Luggage Room J/B Luggage Room J/B ECU Terminals
    G03387075Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    P-GND (6J-5) - Body ground W-B <=> Body ground Constant Continuity
    SG (L24-5) - Body ground W-B <=> Body ground Constant Continuity
    MPX-B (6F-12) - P-GND (6J-5) L-B <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  4. CHECK DRIVER DOOR ECU 
    1. Disconnect the ECU connector D19.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 4: Identifying Driver Door ECU Terminals
    G03387076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (D19-1) - Body ground W-B <=> Body ground Constant Continuity
    CPUB (D19-4) - GND (C1) L-O <=> W-B Constant 10 - 14 V
    BDR (D19-6) - GND (D19-1) B-R <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  5. CHECK PASSENGER DOOR ECU 
    1. Disconnect the ECU connector P11.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 5: Identifying Passenger Door ECU Terminals
    G03387077Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (P11-1) - Body ground W-B <=> Body ground Constant Continuity
    CPUB (P11-4) - GND (P11-1) L-O <=> W-B Constant 10 - 14 V
    BDR (P11-6) - GND (P11-1) G-Y <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  6. CHECK TIRE PRESSURE CONTROL ECU 
    1. Disconnect the ECU connector T9.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 6: Identifying Tire Pressure Control ECU Terminals
    G03387078Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (T9-6) - Body ground W-B <=> Body ground Constant Continuity
    +B (T9-1) - GND (T9-6) B <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  7. CHECK THEFT WARNING ECU 
    1. Disconnect the ECU connector T7.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 7: Identifying Theft Warning ECU Terminals
    G03387079Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (T7-20) - Body ground W-B <=> Body ground Constant Continuity
    +B2 (T7-21) - GND (T7-20) B-O <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  8. CHECK TRANSPONDER KEY ECU (IMMOBILISER ECU) 
    1. Disconnect the ECU connector T13.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 8: Identifying Transponder Key ECU Immobiliser ECU
    G03387080Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (T13-14) - Body ground W-B <=> Body ground Constant Continuity
    CPUB (T13-1) - GND (T13-14) L-O <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  9. CHECK COMBINATION SWITCH 
    1. Disconnect the ECU connector C11.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 9: Identifying Combination Switch
    G03387081Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    E (C11-8) - Body ground W-B <=> Body ground Constant Continuity
    B (C11-1) - E (C11-8) L-B <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  10. CHECK FRONT LIGHT CONTROL ECU 
    1. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    NOTE: inspection should be started from the backside of the relay block with the front light ECU connector being connected.
    Fig 10: Identifying Front Light Control ECU
    G03387082Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (12) - Body ground W-B <=> Body ground Constant Continuity
    FMB3 (8) - GND (12) L-B <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  11. CHECK STEERING PAD SWITCH 
    1. Disconnect the ECU connector.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 11: Identifying Steering Pad Switch
    G03387083Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    ECC (3) - Body ground BR <=> Body ground Constant Continuity
    +B (6) - ECC (3) B-O <=> BR Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  12. CHECK TILT AND TELESCOPIC ECU 
    1. Disconnect the ECU connectors T8.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 12: Identifying Tilt & Telescopic ECU
    G03387084Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (T8-4) - Body ground W-B <=> Body ground Constant Continuity
    ECUB (T8-5) - GND (T7-4) L-O <=> W-B Constant 10 - 14 V
    +B (T8-10) - GND (T7-41) G-Y <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  13. CHECK COMBINATION METER 
    1. Disconnect the ECU connectors C8 and C9.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 13: Identifying ECU Connectors C8 & C9
    G03387085Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    E (C8-11) - Body ground BR <=> Body ground Constant Continuity
    +B (C8-12) - E (C9-11) B <=> BR Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  14. CHECK SKID CONTROL ECU 
    1. Disconnect the ECU connectors S5, S6, S7 and S8.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 14: Identifying Check Skid Control ECU Connectors
    G03387086Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND1 (S8-31) - Body ground W-B <=> Body ground Constant Continuity
    GND2 (S8-6) - Body ground W-B <=> Body ground Constant Continuity
    GND3 (S5-22) - Body ground W-B <=> Body ground Constant Continuity
    GND4 (S5-16) - Body ground W-B <=> Body ground Constant Continuity
    IG1 (S7-6) - GND1 (S8-31) R <=> W-B Ignition SW OFF <=> ON 0 V <=> 10 - 14 V
    IG2 (S6-6) - GND1 (S8-31) G-B <=> W-B Ignition SW OFF <=> ON 0 V <=> 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  15. CHECK AIR CONDITIONING AMPLIFIER 
    1. Disconnect the ECU connector A10.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 15: Identifying ECU Connector A10
    G03387087Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (A10-14) - Body ground W-B <=> Body ground Constant Continuity
    +B (A10-8) - GND (A10-14) W-R <=> W-B Constant 0 V <=> 10 - 14 V
    IG+ (A10-1) - GND (A10-14) W-R <=> W-B Ignition SW OFF <=> ON 0 V <=> 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  16. CHECK ECM 
    1. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    NOTE:
    • Inspection should be started from the backside of the ECM with the ECM connector being connected.
    • Inspect the power source voltage and the body ground before the operation inspection.
    Fig 16: Identifying Terminal Of Vehicle's Side Connectors
    G03387088Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    E1 (E3-7) - Body ground BR <=> Body ground E/G stop, Ignition SW ON Continuity
    +B (E6-6) - E1 (E6-7) B-W <=> BR E/G stop, Ignition SW ON 0 V <=> 10 - 14 V
    +B1 (E6-5) - E1 (E6-7) B-W <=> BR Constant 0 V <=> 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  17. CHECK AIRBAG ECU (See  COMPONENT IDENTIFICATION  ) 
  18. CHECK GATEWAY ECU 
    1. Disconnect the ECU connector.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 17: Identifying ECU Connector
    G03387089Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    CG (G3-11) - Body ground W-B <=> Body ground Constant Continuity
    GND (G3-22) - Body ground W-B <=> Body ground Constant Continuity
    BATT (G3-12) - GND (G3-22) B <=> W-B Constant 10 - 14 V
    NOTE: if the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  19. CHECK METALTOP ECU 
    1. Disconnect the ECU connectors S18 and S19.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 18: Identifying ECU Connectors S18 & S19
    G03387090Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    E1 (S18-6) - Body ground W-B <=> Body ground Constant Continuity
    E2 (S19-9) - Body ground W-B <=> Body ground Constant Continuity
    E3 (S19-10) - Body ground W-B <=> Body ground Constant Continuity
    E4 (S19-11) - Body ground W-B <=> Body ground Constant Continuity
    E5 (S18-5) - Body ground W-B <=> Body ground Constant Continuity
    SGND (S18-19) - Body ground BR <=> Body ground Constant Continuity
    CPUB (S19-8) -E1 (S18-6) L-O <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  20. CHECK DRIVER SEAT ECU 
    1. Disconnect the ECU connectors P21 and P22.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 19: Identifying ECU Connectors P21 & P22
    G03387091Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (P22-7) - Body ground W-B <=> Body ground Constant Continuity
    +B (P22-8) - GND (P22-7) L-W <=> W-B Constant 10 - 14 V
    SYSB (P21-9) - GND (P22-7) L-O <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  21. CHECK PASSENGER SEAT ECU 
    1. Disconnect the ECU connectors P23 and P24.
    2. Check the voltage and continuity of each terminal of the vehicle's side connectors.
    Fig 20: Identifying ECU Connectors P23 & P24
    G03387092Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring color Condition Specified condition
    GND (P24-7) - Body ground W-B <=> Body ground Constant Continuity
    +B (P24-8) - GND (P22-7) L-W <=> W-B Constant 10 - 14 V
    SYSB (P23-9) - GND (P24-7) L-O <=> W-B Constant 10 - 14 V
    NOTE: If the value is not as specified the vehicle's side may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
  22. CHECK RADIO RECEIVER AMPLIFIER (See  TERMINALS OF ECU  ) 
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