Toyota 4Runner manuals

Toyota 4Runner: 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

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.

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:

Reassembly
REASSEMBLY PROCEDURE 1. INSTALL SHIFT LOCK CONTROL ECU SUB-ASSEMBLY (a) Attach the 3 claws to install the shift lock control ECU to the transmission floor shift. (b) Connect the shift lock solenoid connector to the shift lock control ECU. 2. INSTALL IND ...

Ambient Temperature Sensor Circuit (B1412/12)
DESCRIPTION The cooler thermistor (ambient temperature sensor) is installed in the front part of the cooler condenser assembly to detect the ambient temperature and control the air conditioning auto mode. The sensor connected to the air conditioning ampli ...

© 2016-2020 | www.to4runner.net

0.0057