Lexus IS250 · Service Manual STEERING

TERMINALS OF ECU

System information


TERMINALS OF ECU
C116647E01

HINT:
The power steering ECU assembly uses waterproof connectors. Therefore, voltage or waveforms cannot be checked with the connectors connected to the vehicle.
Terminal No. (Symbols)
Wiring Color
Terminal Description
A31-2 (CANH)
B
High-level CAN bus line
A31-3 (CANL)
R
Low-level CAN bus line
A31-4 (PIG)
R
Power source
A31-5 (PGND)
B
Power ground
A31-9 (IG)
B-Y
IG power source
C4-1 (RZG)
G
Rotation angle sensor power source circuit ground
C4-2 (SRZG)
BR
Rotation angle sensor shield ground
C4-3 (RZV)
B
Rotation angle sensor power source
C4-4 (TRQV)
W
Torque sensor power source
C4-6 (TQG1)
L-W
Torque sensor power source circuit ground
C4-7 (RZSN)
W
SIN phase input signal (Rotation angle sensor)
C4-8 (RZCS)
R
COS phase input signal (Rotation angle sensor)
C4-9 (INSN)
G-W
SIN phase input signal (torque sensor input shaft side)
C4-10 (INCS)
R-L
COS phase input signal (torque sensor input shaft side)
C4-11 (OUSN)
G-B
SIN phase input signal (torque sensor output shaft side)
C4-12 (OUCS)
Y-B
COS phase input signal (torque sensor output shaft side)
C4-13 (TQG2)
R-B
Torque sensor detection circuit ground
C5-1 (V)
W
V phase motor output
C5-2 (U)
B
U phase motor output
C5-3 (W)
R
W phase motor output


INSPECT WIRE HARNESS SIDE CONNECTOR
C116648E01
Terminal No. (Symbols)
Wiring Color
Terminal Description
Condition
Specified Condition
A31-4 (PIG) - A31-5 (PGND)
R - B
Power source
Always
Below 1 V
A31-5 (PGND) - Body ground
B - Body ground
Power ground
Always
Below 1 Ω
A31-9 (IG) - A31-5 (PGND)
B-Y - B
IG power source
Engine switch on (IG)
10 to 14 V
C5-2 (U) - C5-3 (W)/C5-1 (V)
B - R/W
U phase motor output
Always
Below 1 Ω
C5-3 (W) - C5-2 (U)/C5-1 (V)
R - B/W
W phase motor output
Always
Below 1 Ω
C5-1 (V) - C5-2 (U)/ C5-3 (W)
W - B/R
V phase motor output
Always
Below 1 Ω
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