Terminals Of Ecu [04/2013 - 09/2020]

TERMINALS OF ECU

Fig 1: ECU Connector Terminal Identification - Power Steering System

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Component without harness connected
(Power Steering ECU Assembly)

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
A19-2 (CA1L)	B	Low-level CAN bus line (V Bus)
A19-3 (CA1H)	G	High-level CAN bus line (V Bus)
A19-4 (CA3H)	W	High-level CAN bus line (V3 Bus)
A19-5 (TS)	SB	TS signal
A19-6 (CA3L)	B	Low-level CAN bus line (V3 Bus)
A19-9 (PGND)	B	Power ground
A19-10 (PIG)	B	Power source
A19-12 (RLY)	LG	EPS relay drive signal
A19-14 (IG)	B	IG power source
C5-1 (RZG)	G	Motor rotation angle sensor power source circuit ground
C5-2 (SRZG)	BR	Motor rotation angle sensor shield ground
C5-3 (RZV)	B	Motor rotation angle sensor power source
C5-4 (TRQV)	W	Torque sensor power source
C5-6 (TQG1)	P	Torque sensor power source circuit ground
C5-7 (RZSN)	W	SIN phase input signal (Motor rotation angle sensor)
C5-8 (RZCS)	R	COS phase input signal (Motor rotation angle sensor)
C5-9 (INSN)	B	SIN phase input signal (Torque sensor input shaft side)
C5-10 (INCS)	R	COS phase input signal (Torque sensor input shaft side)
C5-11 (OUSN)	L	SIN phase input signal (Torque sensor output shaft side)
C5-12 (OUCS)	G	COS phase input signal (Torque sensor output shaft side)
C5-13 (TQG2)	V	Torque sensor detection circuit ground
C4-1 (V)	W	V phase motor output
C4-2 (W)	R	W phase motor output
C4-3 (U)	B	U phase motor output

CHECK WIRE HARNESS SIDE CONNECTOR

Fig 2: Front View Of Wire Harness Connector (To Power Steering ECU Assembly)

Front view of wire harness connector
(to Power Steering ECU Assembly)

Disconnect the A19, C4 and C5 power steering ECU assembly connectors.
Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A19-9 (PGND) - Body ground	B - Body ground	Power ground	Always	Below 1 Ω
A19-12 (RLY) - Body ground	LG - Body ground	EPS relay source	Always	9 to 16 V
A19-14 (IG) - Body ground	B - Body ground	IG power source	Engine switch on (IG)	8 to 16 V
C4-1 (V) - C4-2 (W) or C4-3 (U)	W - R or B	V phase motor output	Always	Below 1 Ω
C4-2 (W) - C4-3 (U) or C4-1 (V)	R - B or W	W phase motor output	Always	Below 1 Ω
C4-3 (U) - C4-1 (V) or C4-2 (W)	B - W or R	U phase motor output	Always	Below 1 Ω