Toyota 4Runner: Terminals Of Ecu

Toyota 4Runner Service Manual / Drivetrain / Vf2a Transfer / 4wd / Awd / Transfer System / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK 4WD CONTROL ECU

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F47-2 (4WDL) - F46-4 (GND)	L - W-B	Transfer indicator switch (L4 position)	Ignition switch ON Transfer shift lever position H2 or H4	10.5 to 14 V
F47-2 (4WDL) - F46-4 (GND)	L - W-B	Transfer indicator switch (L4 position)	Ignition switch ON Transfer shift lever position L4 or N	Below 1.5 V
F47-3 (4WD) - F46-4 (GND)	B - W-B	Transfer indicator switch (4WD position)	Ignition switch ON Transfer shift lever position H2	10.5 to 14 V
F47-3 (4WD) - F46-4 (GND)	B - W-B	Transfer indicator switch (4WD position)	Ignition switch ON Transfer shift lever position H4, L4 or N	Below 1.5 V
F47-9 (DL1) - F46-4 (GND)	LG - W-B	A.D.D. actuator limit switch	Ignition switch ON Transfer shift lever position H2	Below 1.5 V
F47-9 (DL1) - F46-4 (GND)	LG - W-B	A.D.D. actuator limit switch	Ignition switch ON Transfer shift lever position H4, L4 or N	10.5 to 14 V
F47-10 (DL2) - F46-4 (GND)	GR - W-B	A.D.D. actuator limit switch	Ignition switch ON Transfer shift lever position H2	10.5 to 14 V
F47-10 (DL2) - F46-4 (GND)	GR - W-B	A.D.D. actuator limit switch	Ignition switch ON Transfer shift lever position H4, L4 or N	Below 1.5 V
F47-15 (ADD) - F46-4 (GND)	W - W-B	A.D.D. detection switch	Ignition switch ON Transfer shift lever position H2	9.5 to 14 V
F47-15 (ADD) - F46-4 (GND)	W - W-B	A.D.D. detection switch	Ignition switch ON Transfer shift lever position H4, L4 or N	Below 1.5 V
F47-16 (NP) - F46-4 (GND)	R - W-B	Transfer indicator switch (Neutral position)	Ignition switch ON Transfer shift lever position N	Below 1.5 V
F47-16 (NP) - F46-4 (GND)	R - W-B	Transfer indicator switch (Neutral position)	Ignition switch ON Transfer shift lever position not N	10.5 to 14 V
F47-19 (CANH) - F46-4 (GND)	G - W-B	CAN communication line	Ignition switch ON	Pulse generation (See waveform 1)
F47-20 (CANL) - F46-4 (GND)	W - W-B	CAN communication line	Ignition switch ON	Pulse generation (See waveform 2)
F47-21 (L4) - F46-4 (GND)	R - W-B	Transfer L4 signal	Ignition switch ON Transfer shift lever position H2 or H4	10 to 14 V
F47-21 (L4) - F46-4 (GND)	R - W-B	Transfer L4 signal	Ignition switch ON Transfer shift lever position L4 or N	Below 1.5 V
F46-1 (DM1) - F46-4 (GND)	B - W-B	A.D.D. actuator motor	Ignition switch ON Transfer shift lever position H2 → H4, L4 or N (During operation of A.D.D. actuator motor from FREE to LOCK)	10 to 14 V
F46-1 (DM1) - F46-4 (GND)	B - W-B	A.D.D. actuator motor	Ignition switch ON Transfer shift lever position H2 → H4, L4 or N (A.D.D. actuator motor stopped)	Below 1.5 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
F46-5 (DM2) - F46-4 (GND)	Y - W-B	A.D.D. actuator motor	Ignition switch ON Transfer shift lever position H4, L4 or N → H2 (During operation of A.D.D. actuator motor from LOCK to FREE)	10 to 14 V
F46-5 (DM2) - F46-4 (GND)	Y - W-B	A.D.D. actuator motor	Ignition switch ON Transfer shift lever position H4, L4 or N → H2 (A.D.D. actuator motor stopped)	Below 1.5 V

(b) Using an oscilloscope, check waveform 1.

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.

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.

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Inspection

INSPECTION PROCEDURE 1. TRANSFER SYSTEM NOTICE: To shift from H2 to H4, move the transfer shift lever while keeping the wheels facing straight ahead. To shift from H4 to L4, stop t ...

Other materials about Toyota 4Runner:

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (See page ). (b) Measure the voltage and resistance according to the value(s) in the table below. Termi ...

Using the phone book
To enter the menu of each setting, follow the steps below: • Adding a new phone number 1. “Phonebook” → 2. “Add Entry” • Setting speed dial 1. “Phonebook” → 2. “Speed Dial (Set speed dial)” • Changing a registered name 1. “Phon ...