Toyota 4Runner: Terminals Of Ecu

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System(for Entry Function) / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK CERTIFICATION ECU

(a) Disconnect the F79 certification ECU 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
F79-1 (+B) - F79-15 (E)	V - W-B	+B power supply	Always	11 to 14 V
F79-15 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F79-16 (IG) - F79-15 (E)	W - W-B	IG power supply	Engine switch off → on (IG)	Below 1 V →11 to 14 V
F79-17 (CUTB) - F79-15 (E)	L - W-B	+B power supply	Always	11 to 14 V

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
F79-3 (CLG1) - F79-15 (E)	R - W-B	Electrical key antenna (for driver side) sensor signal	Engine switch off, all doors closed, key not in cabin and transmitter lock switch not pressed → pressed	No pulse generation → Pulse generation
F79-4 (CG1B) - F79-15 (E)	W - W-B	Electrical key antenna (for driver side) sensor signal	Engine switch off, all doors closed, key not in cabin and transmitter lock switch not pressed → pressed	No pulse generation → Pulse generation
F79-5 (CLG2) - F79-15 (E)	R - W-B	Electrical key antenna (for front passenger side) sensor signal	Engine switch off, all doors closed, key not in cabin and transmitter lock switch not pressed → pressed	No pulse generation → Pulse generation
F79-6 (CG2B) - F79-15 (E)	W - W-B	Electrical key antenna (for front passenger side) sensor signal	Engine switch off, all doors closed, key not in cabin and transmitter lock switch not pressed → pressed	No pulse generation → Pulse generation
F79-7 (CLG5) - F79-15 (E)	R - W-B	Indoor No. 1 electrical key antenna (front floor) sensor signal	Engine switch off, all doors closed, key not in cabin and lock sensor off → on	No pulse generation → Pulse generation
F79-8 (CG5B) - F79-15 (E)	W - W-B	Indoor No. 1 electrical key antenna (front floor) sensor signal	Engine switch off, all doors closed, key not in cabin and lock sensor off → on	No pulse generation → Pulse generation
F79-18 (TSW1) - F79-15 (E)	V - W-B	Entry lock sensor (for driver side) detection signal	Engine switch off, all doors closed and lock sensor (for driver side) off → on	Pulse generation → Below 2 V
F79-19 (TSW2) - F79-15 (E)	V - W-B	Entry lock sensor (for front passenger side) detection signal	Engine switch off, all doors closed and lock sensor (for front passenger side) off → on	Pulse generation → Below 2 V
F79-20 (SEN1) - F79-15 (E)	W - W-B	Entry unlock sensor (for driver side) detection signal	Engine switch off, all doors locked, key not sufficiently close to vehicle and unlock sensor (for driver side) off → on	Pulse generation → Below 2 V
F79-21 (SEN2) - F79-15 (E)	W - W-B	Entry unlock sensor (for front passenger side) detection signal	Engine switch off, all doors locked, key not sufficiently close to vehicle and unlock sensor (for front passenger side) off → on	Pulse generation → Below 2 V
F79-22 (TSW5) - Body ground	V - Body ground	Back door opener switch signal	Unlock switch off → on	Pulse generation → Below 1 V
F79-23 (TSW6) - Body ground	W - Body ground	Back door control switch signal	Lock switch off → on	Pulse generation → Below 1 V
F79-24 (CLG6) - F79-15 (E)	W - W-B	Indoor No. 2 electrical key antenna (rear floor) sensor signal	Engine switch off, all doors closed, key not in cabin and lock sensor off → on	No pulse generation → Pulse generation
F79-25 (CG6B) - F79-15 (E)	Y - W-B	Indoor No. 2 electrical key antenna (rear floor) sensor signal	Engine switch off, all doors closed, key not in cabin and lock sensor off → on	No pulse generation → Pulse generation
F79-26 (CLG7) - F79-15 (E)	R - W-B	Indoor No. 2 electrical key antenna (inside luggage) sensor signal	Engine switch off, all doors closed, key not in cabin and lock sensor off → on	No pulse generation → Pulse generation
F79-27 (CG7B) - F79-15 (E)	G - W-B	Indoor No. 2 electrical key antenna (inside luggage) sensor signal	Engine switch off, all doors closed, key not in cabin and lock sensor off → on	No pulse generation → Pulse generation
F79-32 (POS1) - F79-15 (E)	P - W-B	Entry unlock sensor (for driver side) output signal	Engine switch off → on (IG)	9 to 14 V → Below 2 V
F79-33 (POS2) - F79-15 (E)	P - W-B	Entry unlock sensor (for front passenger side) output signal	Engine switch off → on (IG)	9 to 14 V → Below 2 V
F78-5 (RCO) - F79-15 (E)	L - W-B	Door control receiver power source	Engine switch off and transmitter switch not pressed → pressed	Below 1 V → 4.5 to 5.5 V
F78-15 (RDA) - F79-15 (E)	G - W-B	Door control receiver data input signal	Engine switch off	11 to 14 V pulse generation at regular intervals
F78-16 (RSSI) - F79-15 (E)	P - W-B	Door control receiver electric wave existence signal	All doors closed, all doors locked and transmitter switch not pressed → pressed	11 to 14 V → Below 2 V
F78-19 (CLG8) - F79-15 (E)	W - W-B	Electrical key antenna (outside luggage) sensor signal	Engine switch off, all doors closed and unlock switch off → on	No pulse generation → Pulse generation
F78-20 (CG8B) - F79-15 (E)	B - W-B	Electrical key antenna (outside luggage) sensor signal	Engine switch off, all doors closed and unlock switch off → on	No pulse generation → Pulse generation

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

2. 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	-	Engine switch power supply	Engine switch on (IG)	11 to 14 V
A-32 (IG) - Body ground	-	Engine switch power supply	Engine switch off	Below 1 V
A-29 (ACC) - Body ground	-	ACC power supply	Engine switch on (ACC)	11 to 14 V
A-29 (ACC) - Body ground	-	ACC power supply	Engine 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
F9-7 (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	Engine switch off, all doors closed and front door LH locked	Pulse generation (see waveform 1 or 2)
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	Engine switch off, all doors closed and front door RH locked	Pulse generation (see waveform 3 or 4)
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	Engine switch off, all doors closed and rear door LH locked	Pulse generation (see waveform 5 or 6)
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	Engine switch off, all doors closed and rear door RH locked	Pulse generation (see waveform 7 or 8)

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)	F9-7 (LSFL) - Body ground
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch off, all doors closed and front door LH locked

(f) Using an oscilloscope, check waveform 2.

Waveform 2 (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

(g) Using an oscilloscope, check waveform 3.

Waveform 3 (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

(h) Using an oscilloscope, check waveform 4.

Waveform 4 (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

(i) Using an oscilloscope, check waveform 5.

Waveform 5 (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

(j) Using an oscilloscope, check waveform 6.

Waveform 6 (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

(k) Using an oscilloscope, check waveform 7.

Waveform 7 (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

(l) Using an oscilloscope, check waveform 8.

Waveform 8 (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

3. 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	Engine switch power supply	Engine switch on (IG)	11 to 14 V
V2-8 (SIG) - Body ground	G - Body ground	Engine switch power supply	Engine 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
W10-17 (SUP) - W10-21 (E3)	W - B	Back door control switch input	Lock switch off	Pulse generation (see waveform 3 or 4)
W10-17 (SUP) - W10-21 (E3)	W - B	Back door control switch input	Lock switch on	Below 1 V
W10-9 (SDN) - W10-21 (E3)	SB - B	Back door control switch input	Unlock switch off	Pulse generation (see waveform 5 or 6)
W10-9 (SDN) - W10-21 (E3)	SB - B	Back door control switch input	Unlock switch on	Below 1 V

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)	W10-17 (SUP) - W10-21 (E3)
Tool Setting	5 V/DIV., 10 ms/DIV.
Condition	Lock switch off

(h) Using an oscilloscope, check waveform 4.

Waveform 4 (Reference)

Item	Content
Terminal No. (Symbol)	W10-17 (SUP) - W10-21 (E3)
Tool Setting	5 V/DIV., 10 ms/DIV.
Condition	Lock switch off

(i) Using an oscilloscope, check waveform 5.

Waveform 5 (Reference)

Item	Content
Terminal No. (Symbol)	W10-9 (SDN) - W10-21 (E3)
Tool Setting	5 V/DIV., 10 ms/DIV.
Condition	Unlock switch off

(j) Using an oscilloscope, check waveform 6.

Waveform 6 (Reference)

Item	Content
Terminal No. (Symbol)	W10-9 (SDN) - W10-21 (E3)
Tool Setting	5 V/DIV., 10 ms/DIV.
Condition	Unlock switch off

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