ELECTRONIC POWER STEERING SYSTEM TERMINALS OF ECU

A0136B6E02
Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
PIG (C24-1) - PGND (C24-2) B - W-B EMPS fuse Always 10 to 16 V
PGND (C24-2) - Body ground W-B - Body ground Body ground Always Below 1 Ω
M1 (A-1) - PGND (C24-2) R - W-B Power steering motor

  1. Steering wheel turned to left with IG switch ON.

  2. Steering wheel turned to right with IG switch ON.

    For RHD:

  1. Below 1 V

  2. 10 to 16 V


    For LHD:

  1. 10 to 16 V

  2. Below 1 V
M2 (A-2) - PGND (C24-2) B - W-B Power steering motor

  1. Steering wheel turned to left with IG switch ON.

  2. Steering wheel turned to right with IG switch ON.

    For RHD:

  1. 10 to 16 V

  2. Below 1 V


    For LHD:

  1. Below 1 V

  2. 10 to 16 V
SIL (C23-2) - PGND (C24-2) W - W-B DLC3 Communication established by connecting intelligent tester to DLC3

Pulse generation

(see waveform 1)
IG (C23-6) - PGND (C24-2) R - W-B ECU-IG fuse IG switch ON 10 to 16 V
TRQ1 (B-5) - PGND (C24-2) W - W-B Torque sensor

  1. Steering wheel not turned (without load)

  2. Steering wheel turned to right with vehicle stationary

  3. Steering wheel turned to left with vehicle stationary

  1. 2.3 to2.7 V

  2. 2.5 to 4.7 V

  3. 0.3 to 2.5 V
TRQV (B-6) - PGND (C24-2) R - W-B Torque sensor IG switch ON 7.5 to 8.5 V
TRQ2 (B-7) - PGND (C24-2) Y - W-B Torque sensor

  1. Steering wheel not turned (without load)

  2. Steering wheel turned to right with vehicle stationary

  3. Steering wheel turned to left with vehicle stationary

  1. 2.3 to2.7 V

  2. 2.5 to 4.7 V

  3. 0.3 to 2.5 V
TRQG (B-8) - PGND (C24-2) B - W-B Torque sensor Always Below 1 V
SPD ( C23-5) - PGND (C24-2 ) V - W-B Skid control ECU IG switch ON

Pulse generation

(see waveform 2)
TACH (C23-12) - PGND (C24-2 ) B - W-B ECM IG switch ON

Pulse generation

(see waveform 3)

IDUP (C23-8) - PGND (C24-2)*1

GR - W-B ECM IG switch ON 5 to 16 V
TC (C23-4) - PGND (C24-2) P - W-B DLC3 IG switch ON 5 to 16 V
DLC3 IG switch ON, short circuit TC and CG terminals of DLC3 Below 1 V
TS (C23-11) - PGND (C24-2) L - W-B DLC3 IG switch ON 5 to 16 V
DLC3 IG switch ON, short circuit TS and CG terminal of DLC3 Below 1 V

Tech Tips

*1 only 1KR-FE


  1. Waveform 1

    A0137BOE01
    Reference:
    Terminal SIL - PGND
    Tool setting 5 V/DIV, 1 ms/DIV
    Condition Communication established by connecting intelligent tester to DLC3

  2. Waveform 2

    A0138OBE01
    Reference:
    Terminal SPD - PGND
    Tool setting 5 V/DIV, 20 ms/DIV
    Condition Vehicle speed approximately 20 km/h

  3. Waveform 3

    A0138OBE01
    Reference:
    Terminal TACH- PGND
    Tool setting 5 V/DIV, 10 ms/DIV
    Condition Idling