POWER STEERING SYSTEM TERMINALS OF ECU


  1. CHECK POWER STEERING ECU ASSEMBLY

    A00Y7PKC06
    *a

    Component without harness connected

    (Power Steering ECU Assembly)

    		 - -

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

      Note

      When the EPS 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
      E30-1 (IG) - Body ground L - Body ground IG power source Ignition switch ON 8 to 16 V
      E30-4 (RLY) - Body ground R - Body ground EPS relay source Always 9 to 16 V
      E30-6 (TS) - Body ground SB - Body ground Test mode signal Always 9 to 16 V
      E30-7 (CANH) - E30-8 (CANL) GR - W CAN communication line Ignition switch off 54 to 69 Ω
      z7-2 (TRQV) - z7-5 (TRQG) R - Body ground Torque sensor voltage source Ignition switch ON 4.5 to 5.5 V
      z7-4 (TRQ2) - z7-5 (TRQG) Y - Body ground 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 1.2 to 2.5 V
      Engine running, steering wheel being turned to left with vehicle stopped 2.5 to 3.8 V
      z7-5 (TRQG) - Body ground B - Body ground Torque sensor ground Always Below 1 Ω
      z7-1 (TRQ1) - z7-5 (TRQG) W - Body ground 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 left with vehicle stopped 1.2 to 2.5 V
      Engine running, steering wheel being turned to right with vehicle stopped 2.5 to 3.8 V
      A53-1 (PGND) - Body ground W-B - Body ground Power ground Always Below 1 Ω
      A53-2 (PIG) - Body ground L - Body ground Power source Ignition switch ON 9 to 16 V

      If the result is not as specified, the ECU may be malfunctioning.