Lexus LX - Variable Gear Ratio Steering System Terminals of ECU; Check Steering Control ECU

VARIABLE GEAR RATIO STEERING SYSTEM > TERMINALS OF ECU
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CHECK STEERING CONTROL ECU
HINT:
Inspect the connectors from the back side while they are connected.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
E82-3 (IG) - E82-7 (PGND) G - W-B
Power supply (ECU-IG No.
4 fuse)
Engine switch on (IG) 11 to 14 V
E82-7 (PGND) - Body
ground
W-B - Body ground Ground Always Below 1 Ω
E82-8 (PIG) - E82-7 (PGND) B - W-B Power supply (VGRS fuse) Always 11 to 14 V
E82-10 (+B1) - E82-7
(PGND)
R - W-B
Power supply (ECU-B1
fuse)
Always 11 to 14 V
E83-1 (BMV) - E82-7
(PGND)
W - W-B
Steering actuator motor
signal (V phase)
Engine running Sine wave
E83-2 (BMU) - E82-7
(PGND)
B - W-B
Steering actuator motor
signal (U phase)
Engine running Sine wave
E83-3 (BMW) - E82-7
(PGND)
R - W-B
Steering actuator motor
signal (W phase)
Engine running Sine wave
E83-6 (SG) - E83-8 (PGD2) BR - W-B
Steering actuator motor
signal shielded ground
Always Below 1 Ω
E83-8 (PGD2) - Body
ground
W-B - Body ground
Steering control ECU
ground
Always Below 1 Ω
E84-1 (+BO) - E82-7
(PGND)
R - W-B
Steering angle sensor power
supply line
Always 11 to 14 V
E84-3 (LV) - E82-7 (PGND) B - W-B
Power source for steering
actuator lock
Engine switch on (IG) 11 to 14 V
E84-4 (S1) - E82-7 (PGND) R - W-B
Steering actuator motor
rotation angle sensor signal
Engine switch on (IG) Sine wave
E84-6 (RV) - E82-7 (PGND) W- W-B
Steering actuator resolver
excitation output voltage
Engine switch on (IG) Sine wave
E84-7 (SIL) - E82-7 (PGND) R - W-B
Diagnostic communication
signal
Engine switch on (IG) Pulse generation
E84-9 (CANH) - E84-20
(CANL)
LG - L CAN communication Engine switch on (IG) Pulse generation
E84-10 (SS1-) - E82-7
(PGND)
GR - W-B Steering angle sensor signal
Engine running and steering
wheel turned
Pulse generation
E84-12 (LG) - E82-7
(PGND)
Y - W-B
Steering actuator lock
ground
Engine running Pulse generation
E84-14 (S2) - E82-7 (PGND) L - W-B
Steering actuator motor
rotation angle sensor signal
Engine switch on (IG) Sine wave
E84-15 (RG) - E82-7
(PGND)
G - W-B
Steering actuator resolver
common ground
Always Below 1 Ω
E84-16 (SG2+) - E82-7
(PGND)
Shielded - W-B
Shielded ground wire for
steering actuator motor
rotation angle sensor signal
wire and control signal wire
Engine switch on (IG) Pulse generation