Terminals Of Ecu

CHECK FOUR WHEEL DRIVE CONTROL ECU

Fig 1: Identifying 4WD Control ECU Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F47-1 (DL1) - F46-4 (GND)	LG - W-B	A.D.D. actuator limit switch	Ignition switch ON Transfer position switch H2	Below 1.5 V
F47-1 (DL1) - F46-4 (GND)	LG - W-B	A.D.D. actuator limit switch	Ignition switch ON Transfer position switch H4 or L4	10 to 14 V
F47-2 (DL2) - F46-4 (GND)	GR - W-B	A.D.D. actuator limit switch	Ignition switch ON Transfer position switch H4 or L4	Below 1.5 V
F47-2 (DL2) - F46-4 (GND)	GR - W-B	A.D.D. actuator limit switch	Ignition switch ON Transfer position switch H2	10 to 14 V
F47-3 (4WD) - F46-4 (GND)	B - W-B	Transfer indicator switch (for 4WD position)	Ignition switch ON Transfer position switch H2	10 to 14 V
F47-3 (4WD) - F46-4 (GND)	B - W-B	Transfer indicator switch (for 4WD position)	Ignition switch ON Transfer position switch H4 or L4	Below 1.5 V
F47-6 (TL1) - F46-4 (GND)	G - W-B	Transfer shift actuator limit switch	Ignition switch ON Transfer position switch H2	Below 1.5 V
F47-6 (TL1) - F46-4 (GND)	G - W-B	Transfer shift actuator limit switch	Ignition switch ON Transfer position switch H4 or L4	10 to 14 V
F47-7 (TL2) - F46-4 (GND)	L - W-B	Transfer shift actuator limit switch	Ignition switch ON Transfer position switch H2 or L4	10 to 14 V
F47-7 (TL2) - F46-4 (GND)	L - W-B	Transfer shift actuator limit switch	Ignition switch ON Transfer position switch H4	Below 1.5 V
F47-8 (TL3) - B-4 (GND)	R - W-B	Transfer shift actuator limit switch	Ignition switch ON Transfer position switch H2 or H4	10 to 14 V
F47-8 (TL3) - B-4 (GND)	R - W-B	Transfer shift actuator limit switch	Ignition switch ON Transfer position switch L4	Below 1.5 V
F47-11 (2-4) - F46-4 (GND)	W - W-B	Transfer position switch	Ignition switch ON Transfer position switch H2 or H4	Below 1.5 V
F47-11 (2-4) - F46-4 (GND)	W - W-B	Transfer position switch	Ignition switch ON Transfer position switch L4	10 to 14 V
F47-13 (LO) - F46-4 (GND)	B - W-B	Transfer position switch	Ignition switch ON Transfer position switch H4 or L4	Below 1.5 V
F47-13 (LO) - F46-4 (GND)	B - W-B	Transfer position switch	Ignition switch ON Transfer position switch H2	10 to 14 V
F47-14 (ADD) - F46-4 (GND)	W - W-B	A.D.D. detection switch	Ignition switch ON Transfer position switch H4 or L4	Below 1.5 V
F47-14 (ADD) - F46-4 (GND)	W - W-B	A.D.D. detection switch	Ignition switch ON Transfer position switch H2	10 to 14 V
F47-16 (4WDL) - F46-4 (GND)	L - W-B	Transfer indicator switch (for L4 position)	Ignition switch ON Transfer position switch L4	Below 1.5 V
F47-16 (4WDL) - F46-4 (GND)	L - W-B	Transfer indicator switch (for L4 position)	Ignition switch ON Transfer position switch H2 or H4	10 to 14 V
F47-19 (CANH) - F46-4 (GND)	G - W-B	CAN communication line	Ignition switch ON	Pulse generation
F47-20 (CANL) - F46-4 (GND)	W - W-B	CAN communication line	Ignition switch ON	Pulse generation
F47-21 (L4) - F46-4 (GND)	R - W-B	Transfer L4 signal	Ignition switch ON Transfer position switch L4	Below 1.5 V
F47-21 (L4) - F46-4 (GND)	R - W-B	Transfer L4 signal	Ignition switch ON Transfer position switch H2 or H4	10 to 14 V
F46-2 (DM1) - F46-4 (GND)	B - W-B	A.D.D. actuator motor	Ignition switch ON Transfer position switch H2 → H4, L4 (A.D.D. actuator motor stopped)	Below 1.5 V
F46-2 (DM1) - F46-4 (GND)	B - W-B	A.D.D. actuator motor	Ignition switch ON Transfer position switch H2 → H4, L4 (During operation of A.D.D. actuator motor from FREE to LOCK)	10 to 14 V
F46-3 (IG) - F46-4 (GND)	R - W-B	IG power	Ignition switch ON	11 to 14 V
F46-4 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F46-6 (DM2) - F46-4 (GND)	Y - W-B	A.D.D. actuator motor	Ignition switch ON Transfer position switch H4, L4 → H2 (A.D.D. actuator motor stopped)	Below 1.5 V
F46-6 (DM2) - F46-4 (GND)	Y - W-B	A.D.D. actuator motor	Ignition switch ON Transfer position switch H4, L4 → H2 (During operation of A.D.D. actuator motor from LOCK to FREE)	10 to 14 V
F46-7 (TM2) - F46-4 (GND)	V - W-B	Transfer shift actuator assembly	Ignition switch ON Transfer position switch L4 → H4 (Transfer shift actuator motor stopped)	Below 1.5 V
F46-7 (TM2) - F46-4 (GND)	V - W-B	Transfer shift actuator assembly	Ignition switch ON Transfer position switch L4 → H4 (During operation of transfer shift actuator motor from LOW to HIGH)	10 to 14 V
F46-8 (TM1) - F46-4 (GND)	P - W-B	Transfer shift actuator assembly	Ignition switch ON Transfer position switch H4 → L4 (Transfer shift actuator motor stopped)	Below 1.5 V
F46-8 (TM1) - F46-4 (GND)	P - W-B	Transfer shift actuator assembly	Ignition switch ON Transfer position switch H4 → L4 (During operation of transfer shift actuator motor from HIGH to LOW)	10 to 14 V

Using an oscilloscope, check waveform 1.

Fig 2: Identifying Waveform 1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

WAVEFORM 1 (REFERENCE)

Item	Content
Terminal No. (Symbols)	F47-19 (CANH) - F46-4 (GND)
Tool setting	1 V/DIV., 10 μsec./DIV.
Condition	Engine stopped and ignition switch ON

TEXT IN ILLUSTRATION

*1	Waveform 1

HINT:

The waveform varies depending on the CAN communication signal.

Using an oscilloscope, check waveform 2.

Fig 3: Identifying Waveform 2

WAVEFORM 2 (REFERENCE)

Item	Content
Terminal No. (Symbols)	F47-20 (CANL) - F46-4 (GND)
Tool setting	1 V/DIV., 10 μsec./DIV.
Condition	Engine stopped and ignition switch ON

TEXT IN ILLUSTRATION

*1	Waveform 2

HINT:

The waveform varies depending on the CAN communication signal.