POWER STEERING SYSTEM TERMINALS OF ECU

  1. CHECK POWER STEERING ECU ASSEMBLY

    C272069C06

    *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.