Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Terminals Of Ecu
- CHECK STEERING LOCK ACTUATOR (STEERING LOCK ECU)Β
Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the L33 steering lock actuator connector.
- Measure the voltage and resistance according to the value(s) in the table below.TERMINAL DESCRIPTION AND VOLTAGE SPECIFICATION CHART
Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L33-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ξ© L33-2 (SGND) - Body ground BR - Body ground Signal ground Always Below 1 Ξ© L33-6 (IG2) - L33-1 (GND) L - W-B IG signal input Engine switch on (IG) 11 to 14 V L33-7 (B) - L33-1 (GND) P - 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.
- Reconnect the L33 steering lock actuator connector.
- Measure the voltage according to the value(s) in the table below.TERMINAL DESCRIPTION AND VOLTAGE SPECIFICATION CHART
Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L33-3 (IGE) - L33-2 (SGND) SB-BR Power source for motor drive Motor operating Below 1 V Motor not operating 11 to 14 V L33-4 (SLP1) - L33-2 (SGND) LG-BR Unlock position sensor output signal Steering locked 11 to 14 V Steering lock unlocked Below 1 V L33-5 (LIN) - L33-2 (SGND) O-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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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