POWER STEERING SYSTEM TERMINALS OF ECU


  1. CHECK POWER STEERING ECU ASSEMBLY

    A018M3TC21
    *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
      p1-1 (IG) - p2-2 (PGND) R - B IG power source Ignition switch ON 9 to 16 V
      p1-4 (CANH) - p1-8 (CANL) W - B CAN communication line Ignition switch off 54 to 69 Ω
      p1-5 (TS) - p2-2 (PGND) O - B Terminal TS of DLC3 Always 9 to 16 V
      a-1 (TRQG) - Body ground B - Body ground Torque sensor ground Always Below 1 Ω
      a-2 (TRQ2) - a-1 (TRQG) Y - B Torque sensor signal Engine running and steering wheel not being turned (without load) 2.3 to 2.7 V
      Engine running and steering wheel being turned to the right with vehicle stopped 0.3 to 2.5 V
      Engine running and steering wheel being turned to the left with vehicle stopped 2.5 to 4.7 V
      a-3 (TRQV) - a-1 (TRQG) R - B Torque sensor voltage source Ignition switch ON 8.5 to 10.5 V
      a-5 (TRQF) - a-1 (TRQG) G - B Torque sensor reference voltage Ignition switch ON 3.35 to 3.37 V
      a-7 (TRQ1) - a-1 (TRQG) W - B Torque sensor signal Engine running and steering wheel not being turned (without load) 2.3 to 2.7 V
      Engine running and steering wheel being turned to the right with vehicle stopped 2.5 to 4.7 V
      Engine running and steering wheel being turned to the left with vehicle stopped 0.3 to 2.5 V
      b-1 (RZCS2) - p2-2 (PGND) B - B Motor rotation angle sensor COS aspect output signal Engine running and steering wheel being turned 0.68 to 4.42 V
      b-2 (RZV2) - p2-2 (PGND) G - B Motor rotation angle sensor excitation output signal Engine running and steering wheel being turned 0.68 to 4.42 V
      b-3 (RZSN2) - p2-2 (PGND) L - B Motor rotation angle sensor SIN aspect output signal Engine running and steering wheel being turned 0.68 to 4.42 V
      b-5 (RZCS1) - p2-2 (PGND) R - B Motor rotation angle sensor COS aspect output signal Engine running and steering wheel being turned 0.68 to 4.42 V
      b-6 (RZV1) - p2-2 (PGND) W - B Motor rotation angle sensor excitation output signal Engine running and steering wheel being turned 0.68 to 4.42 V
      b-7 (RZSN1) - p2-2 (PGND) Y - B Motor rotation angle sensor SIN aspect output signal Engine running and steering wheel being turned 0.68 to 4.42 V
      p2-1 (PIG) - p2-2 (PGND) R - B Power source Always 9 to 16 V
      p2-2 (PGND) - Body ground B - Body ground Power ground Always Below 1 Ω
      c-1 (PHA) - p2-2 (PGND) # - B U phase motor output Engine running and steering wheel being turned Value changes within 4 to 35 V range
      c-2 (PHB) - p2-2 (PGND) # - B V phase motor output Engine running and steering wheel being turned Value changes within 4 to 35 V range
      c-3 (PHC) - p2-2 (PGND) # - B W phase motor output Engine running and steering wheel being turned Value changes within 4 to 35 V range

      Tech Tips

      # means that the motor terminal is tightened directly to the ECU with bolts.