Toyota 4Runner: Terminals Of Ecu

Toyota 4Runner Service Manual / Vehicle Interior / Door Lock / Power Door Lock Control System / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Remove the main body ECU (multiplex network 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-30 (BECU) - Body ground	-	Battery power supply	Always	11 to 14 V
A-31 (ALTB) - Body ground	-	Battery power supply	Always	11 to 14 V
A-32 (IG) - Body ground	-	Ignition switch power supply	Ignition switch ON	11 to 14 V
A-32 (IG) - Body ground	-	Ignition switch power supply	Ignition switch off	Below 1 V
A-29 (ACC) - Body ground	-	ACC power supply	Ignition switch ACC	11 to 14 V
A-29 (ACC) - Body ground	-	ACC power supply	Ignition switch off	Below 1 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 in the wire harness.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
2F-27 (FLCY) - Body ground	R - Body ground	Front door LH courtesy light switch input	Front door LH open	Below 1 V
2F-27 (FLCY) - Body ground	R - Body ground	Front door LH courtesy light switch input	Front door LH closed	11 to 14 V
2B-15 (FRCY) - Body ground	B - Body ground	Front door RH courtesy light switch input	Front door RH open	Below 1 V
2B-15 (FRCY) - Body ground	B - Body ground	Front door RH courtesy light switch input	Front door RH closed	11 to 14 V
F8-3 (LCTY) - Body ground	V - Body ground	Rear door LH courtesy light switch input	Rear door LH open	Below 1 V
F8-3 (LCTY) - Body ground	V - Body ground	Rear door LH courtesy light switch input	Rear door LH closed	11 to 14 V
F10-27 (RCTY) - Body ground	R - Body ground	Rear door RH courtesy light switch input	Rear door RH open	Below 1 V
F10-27 (RCTY) - Body ground	R - Body ground	Rear door RH courtesy light switch input	Rear door RH closed	11 to 14 V
F9-9 (L1) - Body ground	B - Body ground	Door control switch lock input	Door control switch on	Below 1 V
F9-9 (L1) - Body ground	B - Body ground	Door control switch lock input	Door control switch off	Pulse generation (See waveform 1 or 2)
F9-10 (UL1) - Body ground	W - Body ground	Door control switch unlock input	Door control switch on	Below 1 V
F9-10 (UL1) - Body ground	W - Body ground	Door control switch unlock input	Door control switch off	Pulse generation (See waveform 3 or 4)
F9-11 (L2) - Body ground	LG - Body ground	Driver side door key-linked lock input	Driver side door key cylinder in lock position	Below 1 V
F9-11 (L2) - Body ground	LG - Body ground	Driver side door key-linked lock input	Ignition switch off, all doors closed and driver side door key cylinder in neutral position	Pulse generation (See waveform 5 or 6)
F9-24 (UL3) - Body ground	GR - Body ground	Driver side door key-linked unlock input	Driver side door key cylinder in unlock position	Below 1 V
F9-24 (UL3) - Body ground	GR - Body ground	Driver side door key-linked unlock input	Ignition switch off, all doors closed and driver side door key cylinder in neutral position	Pulse generation (See waveform 7 or 8)
2B-3 (ACT+) - Body ground	L - Body ground	Door lock motor lock drive output (except rear LH and back door)	Driver or passenger side door control switch not pushed and driver side door key cylinder in neutral position	Below 1 V
2B-3 (ACT+) - Body ground	L - Body ground	Door lock motor lock drive output (except rear LH and back door)	Lock side of driver or passenger side door control switch pushed, or driver side door key cylinder in lock position	11 to 14 V
2F-8 (ACT+) - Body ground	L - Body ground	Door lock motor lock drive output (for rear LH)	Driver or passenger side door control switch not pushed and driver side door key cylinder in neutral position	Below 1 V
2F-8 (ACT+) - Body ground	L - Body ground	Door lock motor lock drive output (for rear LH)	Lock side of driver or passenger side door control switch pushed, or driver side door key cylinder in lock position	11 to 14 V
2B-1 (ACTD) - Body ground	W - Body ground	Driver side door lock motor unlock drive output	Driver or passenger side door control switch not pushed and driver side door key cylinder in neutral position	Below 1 V
2B-1 (ACTD) - Body ground	W - Body ground	Driver side door lock motor unlock drive output	Unlock side of driver or passenger side door control switch pushed, or driver side door key cylinder in unlock position	11 to 14 V
2B-2 (ACT-) - Body ground	W - Body ground	Door lock motor unlock drive output (for front RH and rear RH)	Driver or passenger side door control switch not pushed and driver side door key cylinder in neutral position	Below 1 V
2B-2 (ACT-) - Body ground	W - Body ground	Door lock motor unlock drive output (for front RH and rear RH)	Unlock side of driver or passenger side door control switch pushed, or driver side door key cylinder in unlock position	11 to 14 V
2F-10 (ACT-) - Body ground	W - Body ground	Door lock motor unlock drive output (for rear LH)	Driver or passenger side door control switch not pushed and driver side door key cylinder in neutral position	Below 1 V
2F-10 (ACT-) - Body ground	W - Body ground	Door lock motor unlock drive output (for rear LH)	Unlock side of driver or passenger side door control switch pushed, or driver side door key cylinder in unlock position	11 to 14 V
2F-9 (TR+) - Body ground	R - Body ground	Back door unlock motor output	Back door opener switch pushed	Below 1 V
2F-9 (TR+) - Body ground	R - Body ground	Back door unlock motor output	Back door opener switch free	11 to 14 V
F9-7 (LSFL) - Body ground	G - Body ground	Front door LH lock position switch input	Front door LH unlocked	Below 1 V
F9-7 (LSFL) - Body ground	G - Body ground	Front door LH lock position switch input	Ignition switch off, all doors closed and front door LH locked	Pulse generation (See waveform 9 or 10)
F9-18 (LSFR) - Body ground	G - Body ground	Front door RH lock position switch input	Front door RH unlocked	Below 1 V
F9-18 (LSFR) - Body ground	G - Body ground	Front door RH lock position switch input	Ignition switch off, all doors closed and front door RH locked	Pulse generation (See waveform 11 or 12)
2F-25 (LSWL) - Body ground	V - Body ground	Rear door LH lock position switch input	Rear door LH unlocked	Below 1 V
2F-25 (LSWL) - Body ground	V - Body ground	Rear door LH lock position switch input	Ignition switch off, all doors closed and rear door LH locked	Pulse generation (See waveform 13 or 14)
F10-2 (LSWR) - Body ground	V - Body ground	Rear door RH lock position switch input	Rear door RH unlocked	Below 1 V
F10-2 (LSWR) - Body ground	V - Body ground	Rear door RH lock position switch input	Ignition switch off, all doors closed and rear door RH locked	Pulse generation (See waveform 15 or 16)

If the result is not as specified, the main body ECU (multiplex network body ECU) or driver side junction block assembly may have a malfunction.

(e) Using an oscilloscope, check waveform 1

Waveform 1 (Reference)

Item	Content
Terminal No. (Symbol)	F9-9 (L1) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Door control switch off

(f) Using an oscilloscope, check waveform 2.

Waveform 2 (Reference)

Item	Content
Terminal No. (Symbol)	F9-9 (L1) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Door control switch off

(g) Using an oscilloscope, check waveform 3.

Waveform 3 (Reference)

Item	Content
Terminal No. (Symbol)	F9-10 (UL1) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Door control switch off

(h) Using an oscilloscope, check waveform 4.

Waveform 4 (Reference)

Item	Content
Terminal No. (Symbol)	F9-10 (UL1) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Door control switch off

(i) Using an oscilloscope, check waveform 5.

Waveform 5 (Reference)

Item	Content
Terminal No. (Symbol)	F9-11 (L2) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and front door key cylinder in neutral position

(j) Using an oscilloscope, check waveform 6.

Waveform 6 (Reference)

Item	Content
Terminal No. (Symbol)	F9-11 (L2) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and front door key cylinder in neutral position

(k) Using an oscilloscope, check waveform 7.

Waveform 7 (Reference)

Item	Content
Terminal No. (Symbol)	F9-24 (UL3) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and driver side door key cylinder in neutral position

(l) Using an oscilloscope, check waveform 8.

Waveform 8 (Reference)

Item	Content
Terminal No. (Symbol)	F9-24 (UL3) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and driver side door key cylinder in neutral position

(m) Using an oscilloscope, check waveform 9.

Waveform 9 (Reference)

Item	Content
Terminal No. (Symbol)	F9-7 (LSFL) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and front door LH locked

(n) Using an oscilloscope, check waveform 10.

Waveform 10 (Reference)

Item	Content
Terminal No. (Symbol)	F9-7 (LSFL) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and front door LH locked

(o) Using an oscilloscope, check waveform 11.

Waveform 11 (Reference)

Item	Content
Terminal No. (Symbol)	F9-18 (LSFR) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and front door RH locked

(p) Using an oscilloscope, check waveform 12.

Waveform 12 (Reference)

Item	Content
Terminal No. (Symbol)	F9-18 (LSFR) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and front door RH locked

(q) Using an oscilloscope, check waveform 13.

Waveform 13 (Reference)

Item	Content
Terminal No. (Symbol)	2F-25 (LSWL) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and rear door LH locked

(r) Using an oscilloscope, check waveform 14.

Waveform 14 (Reference)

Item	Content
Terminal No. (Symbol)	2F-25 (LSWL) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and rear door LH locked

(s) Using an oscilloscope, check waveform 15.

Waveform 15 (Reference)

Item	Content
Terminal No. (Symbol)	F10-2 (LSWR) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and rear door RH locked

(t) Using an oscilloscope, check waveform 16.

Waveform 16 (Reference)

Item	Content
Terminal No. (Symbol)	F10-2 (LSWR) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and rear door RH locked

2. CHECK MULTIPLEX NETWORK DOOR ECU (BACK DOOR P/W)

(a) Disconnect the V2 and W10 multiplex network door ECU (back door P/W) connectors.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
V2-1 (BDR) - Body ground	B - Body ground	Battery power supply	Always	11 to 14 V
V2-7 (BECU) - Body ground	L - Body ground	Battery power supply	Always	11 to 14 V
V2-8 (SIG) - Body ground	G - Body ground	Ignition switch power supply	Ignition switch ON	11 to 14 V
V2-8 (SIG) - Body ground	G - Body ground	Ignition switch power supply	Ignition switch off	Below 1 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 in the wire harness.

(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 switch input	Back door closed	Pulse generation (See waveform 1 or 2)
W10-10 (BDCY) - W10-18 (CTYE)	P - G	Back door courtesy switch input	Back door open	Below 1 V
W10-16 (BKL) - W10-8 (KEYE)*	P - V	Tail gate control switch lock input	Back door lock key cylinder in neutral position	Pulse generation (See waveform 3 or 4)
W10-16 (BKL) - W10-8 (KEYE)*	P - V	Tail gate control switch lock input	Back door lock key cylinder in lock position	Below 1 V
W10-15 (BKUL) - W10-8 (KEYE)*	R - V	Tail gate control switch unlock input	Back door lock key cylinder in neutral position	Pulse generation (See waveform 3 or 4)
W10-15 (BKUL) - W10-8 (KEYE)*	R - V	Tail gate control switch unlock input	Back door lock key cylinder in unlock position	Below 1 V
W10-24 (HSW+) - W10-7 (HSW-)	GR - LG	Back door opener switch input	Back door opener switch off	Pulse generation (See waveform 5 or 6)
W10-24 (HSW+) - W10-7 (HSW-)	GR - LG	Back door opener switch input	Back door opener switch on	Below 1 V

*: w/o Smart key System

If the result is not as specified, the multiplex network door ECU (back door P/W) may have a malfunction.

(e) Using an oscilloscope, check waveform 1.

Waveform 1 (Reference)

Item	Content
Terminal No. (Symbol)	W10-10 (BDCY) - W10-18 (CTYE)
Tool Setting	5 V/DIV., 10 ms/DIV.
Condition	Back door closed

(f) Using an oscilloscope, check waveform 2.

Waveform 2 (Reference)

Item	Content
Terminal No. (Symbol)	W10-10 (BDCY) - W10-18 (CTYE)
Tool Setting	5 V/DIV., 10 ms/DIV.
Condition	Back door closed

(g) Using an oscilloscope, check waveform 3.

Waveform 3 (Reference)

Item	Content
Terminal No. (Symbol)	W10-16 (BKL) - W10-8 (KEYE) W10-15 (BKUL) - W10-8 (KEYE)
Tool Setting	5 V/DIV., 10 ms/DIV.
Condition	Back door lock key cylinder in neutral position

(h) Using an oscilloscope, check waveform 4.

Waveform 4 (Reference)

Item	Content
Terminal No. (Symbol)	W10-16 (BKL) - W10-8 (KEYE) W10-15 (BKUL) - W10-8 (KEYE)
Tool Setting	5 V/DIV., 10 ms/DIV.
Condition	Back door lock key cylinder in neutral position

(i) Using an oscilloscope, check waveform 5.

Waveform 5 (Reference)

Item	Content
Terminal No. (Symbol)	W10-24 (HSW+) - W10-7 (HSW-)
Tool Setting	5 V/DIV., 10 ms/DIV.
Condition	Back door opener switch off

(j) Using an oscilloscope, check waveform 6.

Waveform 6 (Reference)

Item	Content
Terminal No. (Symbol)	W10-24 (HSW+) - W10-7 (HSW-)
Tool Setting	5 V/DIV., 10 ms/DIV.
Condition	Back door opener switch off

3. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY (See page )

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