Power Steering System (For Hatchback) Terminals Of Ecu

Steering. Yaris. Ncp93, 131
Power Assist Systems. Yaris. Ncp93, 131
  1. CHECK POWER STEERING ECU ASSEMBLY

  1. Using an oscilloscope, check waveform 1.

Power Steering System (For Hatchback) -- Terminals Of Ecu



CHECK POWER STEERING ECU ASSEMBLY

Yaris. Ncp93, 131.Power Assist Systems.Power Steering System (For Sedan).Power Steering System (For Hatchback)  Terminals Of Ecu


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.
Yaris. Ncp93, 131.Power Assist Systems.Power Steering System (For Sedan).Power Steering System (For Hatchback)  Terminals Of Ecu
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.