Toyota 4Runner: Terminals Of Ecu

Toyota 4Runner Service Manual / Vehicle Interior / Lighting (int) / Lighting System / 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.

(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
F8-3 (LCTY) - 2B-4 (GND1)	V - W-B	Rear door courtesy light switch LH signal	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
F9-2 (DOMR) - 2B-4 (GND1)	V - W-B	DOME relay drive output	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
F10-27 (RCTY) - 2B-4 (GND1)	R - W-B	Rear door courtesy light switch RH signal	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
F10-4 (MILE) - 2B-4 (GND1)*1	W - W-B	Door mirror foot light signal output	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
2B-18 (ILE) - 2B-4 (GND1)	G - W-B	Interior light signal	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
2B-15 (FRCY) - 2B-4 (GND1)	B - W-B	Front door courtesy light switch RH signal	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
2B-36 (FSPT) - 2B-4 (GND1)2, 3	SB - W-B		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
2F-27 (FLCY) - 2B-4 (GND1)	R - W-B	Front door courtesy light switch LH signal	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
2F-36 (FSPT) - 2B-4 (GND1)*2	SB - W-B	Rear door inside handle illumination LH signal	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.

(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
W10-10 (BDCY) - W10-18 (CTYE)	P - G	Back door courtesy light switch signal	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)
W10-22 (LGLP) - V2-6 (GND)	L - W-B	Spot light LH signal	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)
W10-23 (LGP2) - V2-6 (GND)	L - W-B	Spot light RH signal	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

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

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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