Toyota 4Runner: Terminals Of Ecu

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Theft Deterrent 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	-	Auxiliary battery power supply	Always	11 to 14 V
A-31 (ALTB) - Body ground	-	Auxiliary 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 switch input	Front door LH open	Below 1 V
2F-27 (FLCY) - Body ground	R - Body ground	Front door LH courtesy switch input	Front door LH closed	11 to 14 V
2B-15 (FRCY) - Body ground	B - Body ground	Front door RH courtesy switch input	Front door RH open	Below 1 V
2B-15 (FRCY) - Body ground	B - Body ground	Front door RH courtesy 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
F9-11 (L2) - Body ground	LG - Body ground	Driver side door key-linked lock input	Driver side door key cylinder 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 neutral position	Pulse generation (see waveform 1 or 2)
F9-24 (UL3) - Body ground	GR - Body ground	Driver side door key-linked unlock input	Driver side door key cylinder 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 neutral position	Pulse generation (see waveform 3 or 4)
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 5 or 6)
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 7 or 8)
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 9 or 10)
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 11 or 12)
2B-34 (IND) - Body ground	L - Body ground	Security indicator light signal	Security indicator light illuminates (illuminates only for 30 (+/-5) seconds in alarm sounding state (blinks when system in armed state))	3 to 6 V
2D-23 (HCTY) - Body ground	B - Body ground	Security courtesy switch input	Engine hood open	Below 1 V
2D-23 (HCTY) - Body ground	B - Body ground	Security courtesy switch input	Engine hood closed	Pulse generation (see waveform 13 or 14)
2D-29 (HORN) - Body ground	GR-L - Body ground	Vehicle horn(s) signal	Vehicle horn(s) sounding (theft warning system in alarm sounding state)	Pulse generation
2D-29 (HORN) - Body ground	GR-L - Body ground	Vehicle horn(s) signal	Vehicle horn(s) not sounding (theft warning system in armed state)	11 to 14 V
2D-25 (SH) - Body ground	R - Body ground	Security horn signal	Security horn sounding (theft warning system in alarm sounding state)	Pulse generation
2D-25 (SH) - Body ground	R - Body ground	Security horn signal	Security horn not sounding (theft warning system in armed state)	11 to 14 V

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)	F9-11 (L2) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and driver side door key cylinder neutral position

(f) Using an oscilloscope, check waveform 2.

Waveform 2 (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 driver side door key cylinder neutral position

(g) Using an oscilloscope, check waveform 3.

Waveform 3 (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 neutral position

(h) Using an oscilloscope, check waveform 4.

Waveform 4 (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 neutral position

(i) Using an oscilloscope, check waveform 5.

Waveform 5 (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

(j) Using an oscilloscope, check waveform 6.

Waveform 6 (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

(k) Using an oscilloscope, check waveform 7.

Waveform 7 (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

(l) Using an oscilloscope, check waveform 8.

Waveform 8 (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

(m) Using an oscilloscope, check waveform 9.

Waveform 9 (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

(n) Using an oscilloscope, check waveform 10.

Waveform 10 (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

(o) Using an oscilloscope, check waveform 11.

Waveform 11 (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

(p) Using an oscilloscope, check waveform 12.

Waveform 12 (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

(q) Using an oscilloscope, check waveform 13.

Waveform 13 (Reference)

Item	Content
Terminal No. (Symbol)	2D-23 (HCTY) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and engine hood closed

(r) Using an oscilloscope, check waveform 14.

Waveform 14 (Reference)

Item	Content
Terminal No. (Symbol)	2D-23 (HCTY) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and engine hood closed

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

(a) Disconnect the V2 multiplex network door ECU (back door P/W) connector.

(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
V2-1 (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 and resistance 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 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 is turned lock	Below 1 V
W10-15 (BKUL) - W10-8 (KEYE)*	R - V	Tail gate control switch unlock input	Back door lock key cylinder 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 is turned unlock	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 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 neutral position

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