Terminals Of Ecu

Fig 1: Identifying ECU Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
K28-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
K28-2 (SGND) - Body ground	W-B - Body ground	Signal ground	Always	Below 1 V
K28-3 (IGE) - K28-1 (GND)	LG - W-B	Power source for motor drive	Motor is in operation Motor is not in operation	Below 1 V 10 to 12 V
K28-4 (SLP1) - K28-2 (SGND)	V - W-B	Unlock position sensor output signal	When steering is locked When steering lock is released	10 to 14 V Below 1 V
K28-5 (LIN) - K28-2 (SGND)	W - W-B	LIN communication bus	Engine switch on (IG)	Pulse generation
K28-6 (IG2) - K28-1 (GND)	B - W-B	IG signal input	Engine switch on (IG)	10 to 14 V
K28-7 (B) - K28-1 (GND)	L - W-B	Power source	Always	10 to 14 V