Lexus LX - Steering Lock System Terminals of ECU; CHECK STEERING LOCK ECU

STEERING LOCK SYSTEM > TERMINALS OF ECU
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CHECK STEERING LOCK ECU
a. Disconnect the E26 steering lock ECU connector.
b. Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
E26-1 (GND) - Body
ground
W-B - Body ground Ground Always Below 1 Ω
E26-2 (SGND) - Body
ground
BR - Body ground Signal ground Always Below 1 Ω
E26-6 (IG2) - E26-1
(GND)
B - W-B IG signal input Engine switch on (IG) 11 to 14 V
E26-7 (B) - E26-1 (GND) R - W-B Power source Always 11 to 14 V
If the result is not as specified, there may be a malfunction on the wire harness side.
c. Reconnect the E26 steering lock ECU connector.
d. Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
E26-3 (IGE) - E26-1
(GND)
G - W-B
Power source for motor
drive
Motor operating Below 1 V
E26-3 (IGE) - E26-1
(GND)
G - W-B
Power source for motor
drive
Motor not operating 11 to 14 V
E26-4 (SLP1) - E26-2
(SGND)
SB - BR
Unlock position sensor
output signal
Steering locked 11 to 14 V
E26-4 (SLP1) - E26-2
(SGND)
SB - BR
Unlock position sensor
output signal
Steering lock unlocked Below 1 V
E26-5 (LIN) - E26-2
(SGND)
GR - BR LIN communication bus Engine switch on (IG) Pulse generation
If the result is not as specified, there may be a malfunction on the wire harness side.