POWER STEERING SYSTEM TERMINALS OF ECU


  1. CHECK POWER STEERING ECU ASSEMBLY

    A003M1YC12
    *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
      I21-1 (IG) - Body ground L - Body ground IG power source Power switch on (IG) 8 to 16 V
      I21-7 (CANH) - I21-8 (CANL) V - W CAN communication line Power switch off 54 to 69 Ω
      z8-1 (TRQ2) - z8-2 (TRQG2) Y - G Torque sensor 2 signal Power switch on (READY) and steering wheel not being turned (without load) 2.3 to 2.7 V
      Power switch on (READY) and steering wheel being turned to the right with vehicle stopped 1.2 to 2.5 V
      Power switch on (READY) and steering wheel being turned to the left with vehicle stopped 2.5 to 3.8 V
      z8-2 (TRQG2) - Body ground G - Body ground Torque sensor 2 ground Always Below 1 Ω
      z8-3 (TRQV2) - z8-2 (TRQG2) L - G Torque sensor 2 voltage source Power switch on (IG) 4.5 to 5.5 V
      z8-7 (TRQV1) - z8-8 (TRQG1) R - B Torque sensor 1 voltage source Power switch on (IG) 4.5 to 5.5 V
      z8-8 (TRQG1) - Body ground B - Body ground Torque sensor 1 ground Always Below 1 Ω
      z8-9 (TRQ1) - z8-8 (TRQG1) W - B Torque sensor signal Power switch on (READY) and steering wheel not being turned (without load) 2.3 to 2.7 V
      Power switch on (READY) and steering wheel being turned to the right with vehicle stopped 2.5 to 3.8 V
      Power switch on (READY) and steering wheel being turned to the left with vehicle stopped 1.2 to 2.5 V
      I57-1 (PIG) - Body ground B-W - Body ground Power source Power switch on (IG) 9 to 16 V
      I57-2 (PGND) - Body ground W-B - Body ground Power ground Always Below 1 Ω

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