POWER STEERING SYSTEM TERMINALS OF ECU


  1. CHECK POWER STEERING ECU

    A01CCWUE11

    Tech Tips

    As connector z15 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
    z15-1 (V) W V phase motor output
    z15-2 (U) B U phase motor output
    z15-3 (W) R W phase motor output

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

      Note

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A20-1 (PIG) - A20-2 (PGND) B - W Power source Always 11 to 14 V
      A20-2 (PGND) - Body ground W - Body ground Power ground Always Below 1 Ω
      G18-1 (CANH) - G18-7 (CANL) SB - W CAN communication line Engine switch off 54 to 69 Ω
      G18-6 (IG) - A20-2 (PGND) R - W IG power source Engine switch on (IG) 11 to 14 V
      z14-1 (RZV) - A20-2 (PGND) R - W Rotation angle sensor excitation output signal Engine running, steering wheel being turned 0.68 to 4.42 V
      z14-3 (RZG) - A20-2 (PGND) B - W Rotation angle sensor excitation circuit GND Always Below 1 Ω
      z14-5 (RZCS) - A20-2 (PGND) L - W Rotation angle sensor COS aspect output signal Engine running, steering wheel being turned 0.68 to 4.42 V
      z14-6 (RZSN) - A20-2 (PGND) Y - W Rotation angle sensor SIN aspect output signal Engine running, steering wheel being turned 0.68 to 4.42 V
      z13-5 (TRQ1) - z13-8 (TRQG) W - B Torque sensor signal 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
      z13-6 (TRQV) - z13-8 (TRQG) R - B Torque sensor voltage source Engine switch on (IG) 4.5 to 5.5 V
      z13-7 (TRQ2) - z13-8 (TRQG) Y - B Torque sensor signal 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
      z13-8 (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.