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

F47-6 (RLY1) - F46-4 (GND)

G - W-B

Rear differential lock actuator limit switch

Ignition switch ON

Rear differential lock actuator limit switch on

Below 1.5 V

Ignition switch ON

Rear differential lock actuator limit switch off

11 to 14 V

F47-7 (RLY2) - F46-4 (GND)

P - W-B

Rear differential lock actuator limit switch

Ignition switch ON

Rear differential lock actuator limit switch on

Below 1.5 V

Ignition switch ON

Rear differential lock actuator limit switch off

11 to 14 V

F47-11 (R) - F46-4 (GND)

SB - W-B

Rear differential lock switch

Ignition switch ON

Rear differential lock switch on

Below 1.5 V

Ignition switch ON

Rear differential lock switch off

11 to 14 V

F47-14 (RLP) - F46-4 (GND)

V - W-B

Rear differential lock detection switch

Ignition switch ON

Rear differential lock detection switch on

Below 1.5 V

Ignition switch ON

Rear differential lock detection switch off

9.5 to 14 V

F46-8 (M1) - F46-4 (GND)

LG - W-B

Differential lock actuator motor

Ignition switch ON

Differential lock switch off → on (Differential lock switch OFF → ON (For 5 seconds after power supplied or until switching of limit switch is complete during FREE to LOCK switching))

11 to 14 V

Ignition switch ON

Differential lock switch off → on (Differential lock 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

F46-7 (M2) - F46-4 (GND)

L - W-B

Differential lock actuator motor

Ignition switch ON

Differential lock switch on → off (Differential lock switch ON → OFF (For 5 seconds after power supplied or until switching of limit switch is complete during LOCK to FREE switching))

11 to 14 V

Ignition switch ON

Differential lock switch on → off (Differential lock actuator motor stopped)

Below 1.5 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)

(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 1.

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.

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