POWER STEERING SYSTEM

CHECK POWER STEERING ECU ASSEMBLY

Table 1. Text in Illustration
*a	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
c1-1 (IG) - c2-2 (PGND)	R - B	IG power source	Power switch on (IG)	8 to 16 V
c1-6 (TS) - Test mode terminal	O - Body ground	Test mode signal	Always	9 to 16 V
c1-7 (CANH) - c1-8 (CANL)	Y - SB	CAN communication line	Power switch off	54 to 69 Ω
z18-1 (TRQ2) - z18-2 (TRQG)	Y - B	Torque sensor signal	Power switch on (READY) Steering wheel not being turned (without load)	2.3 to 2.7 V
			Power switch on (READY) Steering wheel being turned to right with vehicle stopped	1.2 to 2.5 V
			Power switch on (READY) Steering wheel being turned to left with vehicle stopped	2.5 to 3.8 V
z18-2 (TRQG) - Body ground	B - Body ground	Torque sensor ground	Always	Below 1 Ω
z18-8 (TRQV) - z18-2 (TRQG)	R - B	Torque sensor voltage source	Power switch on (IG)	4.5 to 5.5 V
z18-9 (TRQ1) - z18-2 (TRQG)	W - B	Torque sensor signal	Power switch on (READY) Steering wheel not being turned (without load)	2.3 to 2.7 V
			Power switch on (READY) Steering wheel being turned to right with vehicle stopped	2.5 to 3.8 V
			Power switch on (READY) Steering wheel being turned to left with vehicle stopped	1.2 to 2.5 V
c2-1 (PIG) - c2-2 (PGND)	R - B	Power source	Always	9 to 16 V
c2-2 (PGND) - Body ground	B - Body ground	Power ground	Always	Below 1 Ω

If the result is not as specified, the ECU may have a malfunction.

POWER STEERING SYSTEM TERMINALS OF ECU