Terminals Of Ecu

CHECK STEERING CONTROL ECU

HINT:

Inspect the connectors from the back side while they are connected.

Fig 1: Identifying Steering Control ECU Connector Terminals

TERMINAL DESCRIPTION AND SPECIFICATION CHART

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
A42-3 (IG) - A42-7 (PGND)	P - W-B	Power supply (ECU-IG fuse)	Engine switch on (IG)	11 to 14 V
A42-4 (CA2H) - A42-9 (CA2L)	B-W	Local CAN communication	Engine switch on (IG)	Pulse generation
A42-7 (PGND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A42-8 (PIG) - A42-7 (PGND)	L - W-B	Power supply (VGRS fuse)	Engine switch on (IG)	11 to 14 V
A42-10 (+BI) - A42-7 (PGND)	R - W-B	Power supply (ECU-B fuse)	Always	11 to 14 V
A43-1 (BMV) - A42-7 (PGND)	W - W-B	Steering actuator motor signal (V phase)	Engine start	Sine wave
A43-2 (BMU) - A42-7 (PGND)	B - W-B	Steering actuator motor signal (U phase)	Engine start	Sine wave
A43-3 (BMW) - A42-7 (PGND)	L - W-B	Steering actuator motor signal (W phase)	Engine start	Sine wave
A43-6 (SG) - A43-8 (PGD2)	BR - W-B	Steering actuator motor signal shield ground	Always	Below 1 Ω
A43-8 (PGD2) - Body ground	W-B - Body ground	Steering control ECU ground	Always	Below 1 Ω
A41-1 (+BO) - A42-7 (PGND)	R - W-B	Steering sensor power supply line	Always	11 to 14 V
A41-3 (LV) - A42-7 (PGND)	Y - W-B	Power source for steering actuator lock	Engine switch on (IG)	11 to 14 V
A41-4 (S1) - A42-7 (PGND)	W - W-B	Steering actuator motor rotation angle sensor signal	Engine switch on (IG)	Sine wave
A41-6 (RV) - A42-7 (PGND)	B - W-B	Steering actuator resolver excitation output voltage	Engine switch on (IG)	Sine wave
A41-7 (SIL) - A42-7 (PGND)	V - W-B	Diagnostic communication signal	Engine switch on (IG)	Pulse generation
A41-9 (CA1H) - A41-20 (CA1L)	B-W	CAN communication	Engine switch on (IG)	Pulse generation
A41-10 (SS1-) - A42-7 (PGND)	LG - W-B	Steering angle sensor signal	Engine switch on (IG), turn the steering wheel	Pulse generation
A41-12 (LG) - A42-7 (PGND)	L - W-B	Steering actuator lock ground	Engine start	Pulse generation
A41-14 (S2) - A42-7 (PGND)	R - W-B	Steering actuator motor rotation angle sensor signal	Engine switch on (IG)	Sine wave
A41-15 (RG) - A42-7 (PGND)	G - W-B	Steering actuator resolver common ground	Always	Below 1 Ω
A41-16 (SG2+) - A42-7 (PGND)	Shielded - W-B	Ground for steering actuator motor rotation angle sensor signal wire and control signal wire shield wire	Engine switch on (IG)	Pulse generation
A41-19 (SS1+) - A42-7 (PGND)	L - W-B	Steering angle sensor signal	Engine switch on (IG), turn the steering wheel	3 to 4 V