POWER STEERING SYSTEM TERMINALS OF ECU


  1. CHECK POWER STEERING ECU

    A003CRSE01

    Tech Tips

    As connector z10 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
    z10-1 (V) V phase motor output
    z10-2 (U) U phase motor output
    z10-3 (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
      A29-1 (PIG) - A29-2 (PGND) B - W Motor power supply Always 11 to 14 V
      A29-2 (PGND) - Body ground W - Body ground Power ground Always Below 1 Ω
      D50-1 (CANH) - D50-7 (CANL) L - W CAN communication line Ignition switch off 54 to 69 Ω
      D50-6 (IG) - A29-2 (PGND) G - W IG power supply Ignition switch ON 11 to 14 V
      z11-6 (RZV) - A29-2 (PGND) R - W Rotation angle sensor excitation output signal Engine running, steering wheel being turned -2.42 to 2.42 V
      z11-4 (RZG) - A29-2 (PGND) B - W Rotation angle sensor excitation circuit ground Always Below 1 Ω
      z11-2 (RZCS) - A29-2 (PGND) L - W Rotation angle sensor COS aspect input signal Engine running, steering wheel being turned -0.73 to 0.73 V
      z11-1 (RZSN) - A29-2 (PGND) Y - W Rotation angle sensor SIN aspect input signal Engine running, steering wheel being turned -0.73 to 0.73 V
      z12-5 (TRQ1) - z12-8 (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 2.5 to 3.8 V
      Engine running, steering wheel turned to left with vehicle stopped 1.2 to 2.5 V
      z12-6 (TRQV) - z12-8 (TRQG) R - B Torque sensor power supply Ignition switch ON 4.5 to 5.5 V
      z12-7 (TRQ2) - z12-8 (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 2.5 V
      Engine running, steering wheel turned to left with vehicle stopped 2.5 to 3.8 V
      z12-8 (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.