POWER STEERING SYSTEM TERMINALS OF ECU


  1. CHECK POWER STEERING ECU ASSEMBLY

    A00YUY0C10
    *a

    Component with harness connected

    (Power Steering ECU Assembly)

    		 - -

    1. Measure the voltage and resistance according to the value(s) in the table below.

      Note

      When the power steering warning light is illuminated due to a malfunction, the fail-safe function may cause the voltage of the power steering ECU assembly terminals to become 0 V.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      h1-1 (IG) - h2-2 (PGND) R - R IG power source Ignition switch ON 11 to 14 V
      h1-4 (CANH) - h1-8 (CANL) W - B CAN communication line Ignition switch off 54 to 69 Ω
      h1-5 (TS) - h2-2 (PGND) O - R Terminal TS of DLC3 Always 11 to 14 V
      a-1 (TRQG) - Body ground - (Not available) - Body ground Torque sensor ground Always Below 1 Ω
      a-2 (TRQ2) - a-1 (TRQG) - (Not available) Torque sensor signal Engine running Steering wheel not being turned (without load) 2.3 to 2.7 V
      Engine running Steering wheel being turned to right with vehicle stopped 0.3 to 2.5 V
      Engine running Steering wheel being turned to left with vehicle stopped 2.5 to 4.7 V
      a-3 (TRQV) - a-1 (TRQG) - (Not available) Torque sensor voltage source Engine running 8.5 to 10.5 V
      a-5 (TRQF) - a-1 (TRQG) - (Not available) Torque sensor reference voltage Engine running 3.35 to 3.37 V
      a-7 (TRQ1) - a-1 (TRQG) - (Not available) Torque sensor signal Engine running Steering wheel not being turned (without load) 2.3 to 2.7 V
      Engine running Steering wheel being turned to right with vehicle stopped 2.5 to 4.7 V
      Engine running Steering wheel being turned to left with vehicle stopped 0.3 to 2.5 V
      b-1 (RZCS2) - h2-2 (PGND) B - R Rotation angle sensor COS aspect output signal Engine running Steering wheel turned 0.68 to 4.42 V
      b-2 (RZV2) - h2-2 (PGND) G - R Rotation angle sensor excitation output signal Engine running Steering wheel turned 0.68 to 4.42 V
      b-3 (RZSN2) - h2-2 (PGND) L - R Rotation angle sensor SIN aspect output signal Engine running Steering wheel turned 0.68 to 4.42 V
      b-5 (RZCS1) - h2-2 (PGND) R - R Rotation angle sensor COS aspect output signal Engine running Steering wheel turned 0.68 to 4.42 V
      b-6 (RZV1) - h2-2 (PGND) W - R Rotation angle sensor excitation output signal Engine running Steering wheel turned 0.68 to 4.42 V
      b-7 (RZSN1) - h2-2 (PGND) Y - R Rotation angle sensor SIN aspect output signal Engine running Steering wheel turned 0.68 to 4.42 V
      h2-1 (PIG) - h2-2 (PGND) R - R Power source Always 11 to 14 V
      h2-2 (PGND) - Body ground R - Body ground Power ground Always Below 1 Ω
      c-1 (PHA) - h2-2 (PGND) # - R A phase motor output Engine running Steering wheel turned Value changes within 4 to 35 V range
      c-2 (PHB) - h2-2 (PGND) # - R B phase motor output Engine running Steering wheel turned Value changes within 4 to 35 V range
      c-3 (PHC) - h2-2 (PGND) # - R C phase motor output Engine running Steering wheel turned Value changes within 4 to 35 V range

      Tech Tips

      # means that the motor terminal is tightened directly to the ECU with bolts.