Toyota 4Runner Quiz
Drivetrain

Terminals Of Ecu

In this manual: Drivetrain
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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

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

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

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

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

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

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

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

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

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.

(c) Using an oscilloscope, check 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.

Test yourself

A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.