Toyota 4Runner manuals

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.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A-29 (ACC) - Body ground

-

ACC power supply

Ignition switch ACC

11 to 14 V

A-30 (BECU) - Body ground

-

Battery power supply

Always

11 to 14 V

A-32 (IG) - Body ground

-

Ignition power supply

Ignition switch ON

11 to 14 V

A-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

F10-3 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Install the main body ECU (See page ).


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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F8-3 (LCTY) - 2B-4 (GND1)

V - W-B

Rear door courtesy light switch LH signal

Rear door LH open

Below 1 V

Rear door LH closed

11 to 14 V

F9-2 (DOMR) - 2B-4 (GND1)

V - W-B

DOME relay drive output

Battery saving control not operating

11 to 14 V

Battery saving control operating

Below 1 V

F10-27 (RCTY) - 2B-4 (GND1)

R - W-B

Rear door courtesy light switch RH signal

Rear door RH open

Below 1 V

Rear door RH closed

11 to 14 V

F10-4 (MILE) - 2B-4 (GND1)*1

W - W-B

Door mirror foot light signal output

Door mirror foot light on

11 to 14 V

Door mirror foot light off

Below 1 V

2B-18 (ILE) - 2B-4 (GND1)

G - W-B

Interior light signal

Interior light on

Below 1 V

Interior light off

11 to 14 V

2B-15 (FRCY) - 2B-4 (GND1)

B - W-B

Front door courtesy light switch RH signal

Front door RH open

Below 1 V

Front door RH closed

11 to 14 V

2B-36 (FSPT) - 2B-4 (GND1)*2, *3

SB - W-B

Front door inside handle illumination, rear door inside handle illumination RH and interior foot light signal

Front door inside handle illumination and interior foot light on

Below 1 V

Front door inside handle illumination and interior foot light off

11 to 14 V

2F-27 (FLCY) - 2B-4 (GND1)

R - W-B

Front door courtesy light switch LH signal

Front door LH open

Below 1 V

Front door LH closed

11 to 14 V

2F-36 (FSPT) - 2B-4 (GND1)*2

SB - W-B

Rear door inside handle illumination LH signal

Rear door inside handle illumination on

Below 1 V

Rear door inside handle illumination off

11 to 14 V

  • *1: w/ Door Mirror Foot Light
  • *2: w/ Inside Handle Illumination
  • *3: w/ Interior Foot Light

If the result is not as specified, the main body ECU may have a malfunction.

2. CHECK MULTIPLEX NETWORK DOOR ECU


(a) Disconnect the V2 and W10 multiplex network door ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

V2-17 (B1) - Body ground

R - Body ground

Battery power supply

Always

11 to 14 V

V2-6 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the V2 and W10 multiplex network door ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

W10-10 (BDCY) - W10-18 (CTYE)

P - G

Back door courtesy light switch signal

Back door open

Below 1 V

Back door closed

Pulse generation

(See waveform 1 or 2)

W10-22 (LGLP) - V2-6 (GND)

L - W-B

Spot light LH signal

Spot light LH on

Pulse generation

(See waveform 3)

Spot light LH off

Pulse generation

(See waveform 4)

W10-23 (LGP2) - V2-6 (GND)

L - W-B

Spot light RH signal

Spot light RH on

Pulse generation

(See waveform 3)

Spot light RH off

Pulse generation

(See waveform 4)

W10-25 (B2) - V2-6 (GND)

R - W-B

Battery power supply

Always

11 to 14 V

W10-26 (B3) - V2-6 (GND)

R - W-B

Battery power supply

Always

11 to 14 V

(1) Waveform 1


Item

Content

Terminal No. (Symbol)

W10-10 (BDCY) - W10-18 (CTYE)

Tool setting

5 V/DIV., 10 ms/DIV.

Condition

Back door closed

(2) Waveform 2


Item

Content

Terminal No. (Symbol)

W10-10 (BDCY) - W10-18 (CTYE)

Tool setting

5 V/DIV., 10 ms/DIV.

Condition

Back door closed

(3) Waveform 3


Item

Content

Terminal No. (Symbol)

W10-22 (LGLP) - V2-6 (GND)

W10-23 (LGP2) - V2-6 (GND)

Tool setting

5 V/DIV., 200 ms/DIV.

Condition

  • Spot light LH on
  • Spot light RH on

(4) Waveform 4


Item

Content

Terminal No. (Symbol)

W10-22 (LGLP) - V2-6 (GND)

W10-23 (LGP2) - V2-6 (GND)

Tool setting

5 V/DIV., 200 ms/DIV.

Condition

  • Spot light LH off
  • Spot light RH off
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