Terminals Of Ecu

TERMINALS OF ECU

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

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 DESCRIPTION CHART

Terminal No. (Symbol)	Wiring Color	Terminal Description
A31-2 (CANH)	B	High-level CAN bus line
A31-3 (CANL)	R	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 DESCRIPTION CHART

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