POWER STEERING SYSTEM TERMINALS OF ECU


  1. CHECK POWER STEERING ECU ASSEMBLY

    A01MIHEC14
    *a

    Component with harness connected

    (Power Steering ECU Assembly)

    		 - -

    Tech Tips

    As connector z7 uses a lock lever, each terminal cannot be checked while the connector is still connected to the power steering ECU.

    Terminal No. (Symbol) Wiring Color Terminal Description
    z7-1 (MV) W V phase motor output
    z7-2 (MU) B U phase motor output
    z7-3 (MW) R W phase motor output

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

      Note

      When the power steering warning light (red) 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
      z8-1(R+) - Body ground R - Body ground Rotation angle sensor excitation output signal Power switch on (READY), Steering wheel turned 0.68 to 4.42 V
      z8-3(RGND) - Body ground B - Body ground Rotation angle sensor excitation circuit GND Always Below 1 Ω
      z8-5(RCOS) - Body ground L - Body ground Rotation angle sensor COS aspect output signal Power switch on (READY), Steering wheel turned 0.68 to 4.42 V
      z8-6(RSIN) - Body ground Y - Body ground Rotation angle sensor SIN aspect output signal Power switch on (READY), Steering wheel turned 0.68 to 4.42 V
      z9-5(TRQ1) - Body ground W - Body ground Torque sensor 1 signal Power switch on (READY), steering wheel not being turned (without load) 2.3 to 2.7 V
      Power switch on (READY), steering wheel being turned to the right with vehicle stopped 2.5 to 3.8 V
      Power switch on (READY), steering wheel being turned to the left with vehicle stopped 1.2 to 2.5 V
      z9-6(TRQV) - z9-8(TRQG) R - B Torque sensor ground Always Below 1 Ω
      z9-7(TRQ2) - Body ground Y - Body ground Torque sensor 2 signal Power switch on (READY), steering wheel not being turned (without load) 2.3 to 2.7 V
      Power switch on (READY), steering wheel being turned to the left with vehicle stopped 1.2 to 2.5 V
      Power switch on (READY), steering wheel being turned to the right with vehicle stopped 2.5 to 3.8 V
      z9-8(TRQG) - Body ground B - Body ground Torque sensor ground Always Below 1 Ω
      G47-1(CANH) - G47-7(CANL) R - W CAN communication line Power switch off 54 to 69 Ω
      G47-6(IG) - Body ground LG - Body ground IG power source Power switch on (IG) 9 to 16 V
      A24-1(PIG) - Body ground B - Body ground Power source Power switch off 9 to 16 V
      A24-2(PGND) - Body ground W-B - Body ground Power ground Always Below 1 Ω