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Terminals Of Ecu

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  1. CHECK POWER STEERING ECU 
    Fig 1: Identifying Power Steering ECU Connector Terminals
    G05585139Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    Measurements cannot be performed on the C connector side of the power steering ECU.

    TERMINAL DESCRIPTION

    Symbols Wiring Color Terminal Description
    U W U phase motor output
    V B V phase motor output
    W W-R W phase motor output
    1. Measure the voltage and resistance of the connectors.
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      PIG (A1-1) - PGND (A1-2) W-B - W-B Power source Always 10 to 14 V
      IG (E18-5) - PGND (A1-2) L - W-B IG power source Ignition switch ON 10 to 14 V
      TRQ1 (e1-6) - TRQG (e1-1) G - B Torque sensor signal Ignition switch ON Steering wheel not turned (without load) 2.3 to 2.7 V
      Ignition switch ON Steering wheel turned to right with vehicle stopped 2.5 to 4.04 V
      Ignition switch ON Steering wheel turned to left with vehicle stopped 0.95 to 2.5 V
      TRQ2 (e1-2) - TRQG (e1-1) Y - B Torque sensor signal Ignition switch ON Steering wheel not turned (without load) 2.3 to 2.7 V
      Ignition switch ON Steering wheel turned to right with vehicle stopped 0.95 to 2.5 V
      Ignition switch ON Steering wheel turned to left with vehicle stopped 2.5 to 4.04 V
      TRQF (e1-4) - TRQG (e1-1) W - B Torque sensor reference voltage Ignition switch ON 3.35 to 3.37 V
      TRQV (e1-3) - TRQG (e1-1) R - B Torque sensor voltage source Ignition switch ON 8.5 to 10.5 V
      TRQG (e1-1) - Body ground B - Body ground Torque sensor ground Always Below 1 Ω
      PGND (A1-2) - Body ground W-B - Body ground Power ground Always Below 1 Ω
      C1 (e2-1) - PGND (A1-2) R - W-B Resolver signal Ignition switch ON Steering wheel is turned 0.68 to 4.42 V
      C2 (e2-5) - PGND (A1-2) L - W-B Resolver signal Ignition switch ON Steering wheel is turned 0.68 to 4.42 V
      S1 (e2-2) - PGND (A1-2) B - W-B Resolver signal Ignition switch ON Steering wheel is turned 0.68 to 4.42 V
      S2 (e2-6) - PGND (A1-2) Y - W-B Resolver signal Ignition switch ON Steering wheel is turned 0.68 to 4.42 V
      R1 (e2-4) - PGND (A1-2) W - W-B Resolver excitation signal Ignition switch ON Steering wheel is turned 2.9 to 5.1 V
      R2 (e2-8) - PGND (A1-2) G - W-B Resolver excitation signal Ignition switch ON Steering wheel is turned 2.9 to 5.1 V
      CANH (E18-2) - CANL (E18-8) Y - W CAN communication line Ignition switch OFF 54 to 67 Ω

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

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