Terminals Of Ecu
- CHECK STEERING LOCK ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item G23-1 (GND) - Body ground - W-B - Body ground Ground* Always Below 1 Ω - G23-3 (IGE) - G23-1 (GND) Input W - W-B Steering lock motor activation command signal (motor activation command signal sent from power management control ECU) Any door opened when conditions below met, and then steering lock motor activated: - Shift lever in P
- Steering lock unlocked in advance by carrying key and turning engine switch on (IG)
- After above condition met, engine switch turned off
Pulse generation (See Waveform) Smart Access - Power Supply Short
- Power Supply Open
- Unlock Request Receive
- Lock Request Receive
G23-4 (SLP1) - G23-1 (GND) Output SB - W-B Steering lock bar position signal (output signal from steering unlock sensor) Steering locked → unlocked 11 to 14 V → Below 1.2 V Smart Access - Push Start Error
- Sensor Value
G23-5 (LIN) - G23-1 (GND) Input/Output G - W-B LIN communication line - - Smart Access - Steering Lock Start Cond
- IG(Lin)
G23-6 (IG2) - G23-1 (GND) Input W - W-B Power source mode signal (IG2 power supply input for entire steering lock actuator)* Engine switch off → engine switch on (IG) Below 1 V → 11 to 14 V Smart Access - Ignition Switch
- IG2 Status
- IG(Lin)
G23-7 (B) - Body ground Input G - Body ground Power source* Always 11 to 14 V - - *: When there is a problem with the power source input, the certification ECU may store DTC B2786.
NOTE:There is 1 motor and 2 sensors built into the steering lock actuator.
HINT:
- When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.
- In order to take measurements when the lock motor is operating, perform either of the following operations:
- To unlock the steering, carry the key and turn the engine switch on (ACC) or on (IG) while the shift lever is in P.
- To lock the steering, turn the engine switch off with the shift lever in P, and then open a door.
- Waveform
Item Content Tester Connection G23-3 (IGE) - G23-1 (GND) Tool Setting 2 V/DIV., 200 ms./DIV. Vehicle Condition Steering lock motor not operating → Steering lock motor operating → Steering lock motor not operating TEXT IN ILLUSTRATION*a Steering lock motor not operating *b Steering lock motor operating
- Measure the voltage and resistance according to the value(s) in the table below.