Terminals Of Ecu

TERMINALS OF ECU

Fig 1: Identifying A31, C5 And C4 ECU Connector Terminals Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

The power steering ECU assembly uses waterproof connectors. Therefore, voltage or waveforms cannot be checked with the connectors connected to the vehicle.

Terminal No. (Symbol)	Wiring Color	Terminal Description
A31-2 (CANH)	P	High-level CAN bus line
A31-3 (CANL)	W	Low-level CAN bus line
A31-4 (PIG)	R	Power source
A31-5 (PGND)	B	Power ground
A31-9 (IG)	B-Y	IG power source
C4-1 (RZG)	G	Rotation angle sensor power source circuit ground
C4-2 (SRZG)	BR	Rotation angle sensor shield ground
C4-3 (RZV)	B	Rotation angle sensor power source
C4-4 (TRQV)	W	Torque sensor power source
C4-6 (TQG1)	L-W	Torque sensor power source circuit ground
C4-7 (RZSN)	W	SIN phase input signal (Rotation angle sensor)
C4-8 (RZCS)	R	COS phase input signal (Rotation angle sensor)
C4-9 (INSN)	G-W	SIN phase input signal (torque sensor input shaft side)
C4-10 (INCS)	R-L	COS phase input signal (torque sensor input shaft side)
C4-11 (OUSN)	G-B	SIN phase input signal (torque sensor output shaft side)
C4-12 (OUCS)	Y-B	COS phase input signal (torque sensor output shaft side)
C4-13 (TQG2)	R-B	Torque sensor detection circuit ground
C5-1 (V)	W	V phase motor output
C5-2 (U)	B	U phase motor output
C5-3 (W)	R	W phase motor output

INSPECT WIRE HARNESS SIDE CONNECTOR

Fig 2: Identifying A31, C5 And C4 Wire Harness Side Connector Terminals

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A31-4 (PIG) - A31-5 (PGND)	R - B	Power source	Always	Below 1 V
A31-5 (PGND) - Body ground	B - Body ground	Power ground	Always	Below 1 Ω
A31-9 (IG) - A31-5 (PGND)	B-Y - B	IG power source	Engine switch on (IG)	11 to 14 V
C5-2 (U) - C5-3 (W)/C5-1 (V)	B - R/W	U phase motor output	Always	Below 1 Ω
C5-3 (W) - C5-2 (U)/C5-1 (V)	R - B/W	W phase motor output	Always	Below 1 Ω
C5-1 (V) - C5-2 (U)/C5-3 (W)	W - B/R	V phase motor output	Always	Below 1 Ω