POWER STEERING SYSTEM (for Hatchback) > TERMINALS OF ECU



CHECK POWER STEERING ECU ASSEMBLY

C233843E02


Terminal No. (Symbol)
Wiring Color
Terminal Description
Condition
Specified Condition
A68-1 (PIG) - A68-2 (PGND)
W - W-B
EPS fuse
Always
11 to 14 V
A68-2 (PGND) - Body ground
W-B - Body ground
Body ground
Always
Below 1 Ω
D104-1 (IG) - A68-2 (PGND)
R - W-B
ECU-IG NO. 1 fuse
Ignition switch ON
11 to 14 V
D104-2 (SPD) - A68-2 (PGND)
*1
V - W-B
Vehicle speed signal
Vehicle being driven at approximately 40 km/h (25 mph)
Pulse generation
(See waveform 1)
D104-7 (CANH) - D104-8 (CANL)
LG - W
CAN BUS
Ignition switch off
108 to 132 Ω
b10-1 (M1) - A68-2 (PGND)
R - W-B
Power steering motor
  1. Engine running
  2. Turn steering wheel to left
6 to 11 V
  1. Engine running
  2. Turn steering wheel to right
11 to 14 V
b10-2 (M2) - A68-2 (PGND)
B - W-B
Power steering motor
  1. Engine running
  2. Turn steering wheel to left
11 to 14 V
  1. Engine running
  2. Turn steering wheel to right
6 to 11 V
c10-1 (TRQ2) - A68-2 (PGND)
Y - W-B
Torque sensor
Engine running, steering wheel not turned (without load)
2.3 to 2.7 V
Engine running, steering wheel turned to right with vehicle stopped
1.2 to 2.5 V
Engine running, steering wheel turned to left with vehicle stopped
2.5 to 3.8 V
c10-2 (TRQG) - A68-2 (PGND)
B - W-B
Torque sensor
Always
Below 1 Ω
c10-8 (TRQV) - A68-2 (PGND)
R - W-B
Torque sensor
Engine running
4.5 to 5.5 V
c10-9 (TRQ1) - A68-2 (PGND)
W - W-B
Torque sensor
Engine running, steering wheel not turned (without load)
2.3 to 2.7 V
Engine running, steering wheel turned to right with vehicle stopped
2.5 to 3.8 V
Engine running, steering wheel turned to left with vehicle stopped
1.2 to 2.5 V
  1. *1: w/o ABS

Using an oscilloscope, check waveform 1.
C234615E02
Item
Contents
Symbol
SPD - PGND
Tool Setting
5 V/DIV., 10 ms/DIV.
Vehicle Condition
Vehicle being driven at approximately 40 km/h (25 mph)

HINT:
The wavelength becomes shorter as the vehicle speed increases.