POWER STEERING SYSTEM TERMINALS OF ECU


  1. CHECK POWER STEERING ECU

    A004HZPE02
    Text in Illustration
    *a

    Component without harness connected

    (Power Steering ECU Assembly)

    		 - -

    Tech Tips

    As connector z1 uses a lock lever, each terminal cannot be checked while the connector is still connected to the power steering ECU.

    Terminal No. (Symbol) Terminal Description
    z1-1 (V) V phase motor output
    z1-2 (U) U phase motor output
    z1-3 (W) W phase motor output

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A14-1 (PIG) - A14-2 (PGND) W - B Motor power supply Always 9 to 16 V
      A14-2 (PGND) - Body ground B - Body ground Power ground Always Below 1 Ω
      A15-1 (CANH) - A15-7 (CANL) B - W CAN communication line Ignition switch off 57 to 63 Ω
      A15-6 (IG) - A14-2 (PGND) G-W - B IG power supply Ignition switch ON 9 to 16 V
      z2-5 (RZV) - A14-2 (PGND) R - B Rotation angle sensor excitation output signal Engine running, steering wheel being turned 0.68 to 4.42 V
      z2-7 (RZG) - A14-2 (PGND) B - B Rotation angle sensor excitation circuit ground Always Below 1 Ω
      z2-13 (RZCS) - A14-2 (PGND) L - B Rotation angle sensor COS aspect input signal Engine running, steering wheel being turned 0.68 to 4.42 V
      z2-14 (RZSN) - A14-2 (PGND) Y - B Rotation angle sensor SIN aspect input signal Engine running, steering wheel being turned 0.68 to 4.42 V
      z2-8 (TRQ1) - z2-11 (TRQG) W - B Torque sensor signal 1 Engine running, steering wheel not turned (without load) 2.3 to 2.7 V
      Engine running, steering wheel turned to right with vehicle stopped 2.3 to 3.8 V
      Engine running, steering wheel turned to left with vehicle stopped 1.2 to 2.7 V
      z2-9 (TRQV) - z2-11 (TRQG) R - B Torque sensor power supply Ignition switch ON 4.5 to 5.5 V
      z2-10 (TRQ2) - z2-11 (TRQG) Y - B Torque sensor signal 2 Engine running, steering wheel not turned (without load) 2.3 to 2.7 V
      Engine running, steering wheel turned to right with vehicle stopped 1.2 to 2.7 V
      Engine running, steering wheel turned to left with vehicle stopped 2.3 to 3.8 V
      z2-11 (TRQG) - Body ground B - Body ground Torque sensor ground Always Below 1 Ω

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