POWER STEERING SYSTEM TERMINALS OF ECU

CHECK POWER STEERING ECU ASSEMBLY

Component without harness connected

(Power Steering ECU Assembly)

Measure the voltage and resistance according to the value(s) in the table below.

Note

When the EPS warning light is illuminated due to a malfunction, the fail-safe function may cause the voltage of the power steering ECU assembly terminals to become 0 V.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
G20-1 (IG) - Body ground	L - Body ground	IG power source	Engine switch on (IG)	8 to 16 V
G20-7 (CANH) - G20-8 (CANL)	P - W	CAN communication line	Engine switch off	54 to 69 Ω
z18-1 (TRQ2) - z18-2 (TRQG2)	Y - G	Torque sensor 2 signal	Engine running and steering wheel not being turned (without load)	2.3 to 2.7 V
			Engine running and steering wheel being turned to the right with vehicle stopped	1.2 to 2.5 V
			Engine running and steering wheel being turned to the left with vehicle stopped	2.5 to 3.8 V
z18-2 (TRQG2) - Body ground	G - Body ground	Torque sensor 2 ground	Always	Below 1 Ω
z18-3 (TRQV2) - z18-2 (TRQG2)	L - G	Torque sensor 2 voltage source	Engine switch on (IG)	4.5 to 5.5 V
z18-7 (TRQV1) - z18-8 (TRQG1)	R - B	Torque sensor 1 voltage source	Engine switch on (IG)	4.5 to 5.5 V
z18-8 (TRQG1) - Body ground	B - Body ground	Torque sensor 1 ground	Always	Below 1 Ω
z18-9 (TRQ1) - z18-8 (TRQG1)	W - B	Torque sensor 1 signal	Engine running and steering wheel not being turned (without load)	2.3 to 2.7 V
			Engine running and steering wheel being turned to the right with vehicle stopped	2.5 to 3.8 V
			Engine running and steering wheel being turned to the left with vehicle stopped	1.2 to 2.5 V
G53-1 (PIG) - Body ground	B - Body ground	Power source	Always	9 to 16 V
G53-2 (PGND) - Body ground	W - Body ground	Power ground	Always	Below 1 Ω

If the result is not as specified, the ECU may be malfunctioning.