WIRELESS DOOR LOCK CONTROL SYSTEM(w/ Smart Entry and Start System) TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*A	Main Body ECU (Multiplex Network Body ECU) with 2 Connectors	-	-
*1	Main Body ECU (Multiplex Network Body ECU)	-	-
*a	2 connectors	-	-

*A	Main Body ECU (Multiplex Network Body ECU) with 3 Connectors	-	-
*1	Main Body ECU (Multiplex Network Body ECU)	-	-
*a	3 connectors	-	-

Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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Reconnect the instrument panel junction block assembly connectors.

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

Tech Tips

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
MB-11 (GND1) - Body ground	-	Ground	Always	Below 1 Ω
MB-31 (BECU) - Body ground	-	Battery power supply	Always	11 to 14 V
MB-30 (ACC) - Body ground	-	ACC power supply	Engine switch on (ACC)	11 to 14 V
MB-30 (ACC) - Body ground	-	ACC power supply	Engine switch off	Below 1 V
MB-32 (IG) - Body ground	-	IG power supply	Engine switch on (IG)	11 to 14 V
MB-32 (IG) - Body ground	-	IG power supply	Engine switch off	Below 1 V

Install the main body ECU (multiplex network body ECU) to instrument panel junction block assembly.

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Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
4H-10 (ACT-) - Body ground	LA-P - Body ground	Door lock motor unlock drive output (all doors)	Door control switch or driver door key cylinder off	Below 1 V
4H-10 (ACT-) - Body ground	LA-P - Body ground	Door lock motor unlock drive output (all doors)	Door control switch or driver door key cylinder unlocked	11 to 14 V
4D-3 (ACT-) - Body ground	G - Body ground	Door lock motor unlock drive output (all doors)	Door control switch or driver door key cylinder off	Below 1 V
4D-3 (ACT-) - Body ground	G - Body ground	Door lock motor unlock drive output (all doors)	Door control switch or driver door key cylinder unlocked	11 to 14 V
4H-12 (ACT+) - Body ground	LA-L - Body ground	Door lock motor lock drive output (except driver door)	Door control switch or driver door key cylinder off	Below 1 V
4H-12 (ACT+) - Body ground	LA-L - Body ground	Door lock motor lock drive output (except driver door)	Door control switch or driver door key cylinder locked	11 to 14 V
4D-1 (ACT+) - Body ground	LA-R - Body ground	Door lock motor lock drive output (except driver door)	Door control switch or driver door key cylinder off	Below 1 V
4D-1 (ACT+) - Body ground	LA-R - Body ground	Door lock motor lock drive output (except driver door)	Door control switch or driver door key cylinder locked	11 to 14 V
4D-2 (ACTD) - Body ground	BE - Body ground1 B - Body ground2	Door lock motor lock drive output (for driver door)	Door control switch or driver door key cylinder off	Below 1 V
4D-2 (ACTD) - Body ground	BE - Body ground1 B - Body ground2	Door lock motor lock drive output (for driver door)	Door control switch or driver door key cylinder locked	11 to 14 V
F19-27 (FRCY) - Body ground	L - Body ground	Front door courtesy light switch assembly (for RH) input	Front door RH open	Below 1 V
F19-27 (FRCY) - Body ground	L - Body ground	Front door courtesy light switch assembly (for RH) input	Front door RH closed	11 to 14 V or Pulse generation
F19-6 (FLCY) - Body ground	GR - Body ground	Front door courtesy light switch assembly (for LH) input	Front door LH open	Below 1 V
F19-6 (FLCY) - Body ground	GR - Body ground	Front door courtesy light switch assembly (for LH) input	Front door LH closed	11 to 14 V or Pulse generation
4H-36 (LCTY) - Body ground	SB - Body ground	Rear door courtesy light switch assembly (for LH) input	Rear door LH open	Below 1 V
4H-36 (LCTY) - Body ground	SB - Body ground	Rear door courtesy light switch assembly (for LH) input	Rear door LH closed	11 to 14 V or Pulse generation
4D-30 (RCTY) - Body ground	LG - Body ground	Rear door courtesy light switch assembly (for RH) input	Rear door RH open	Below 1 V
4D-30 (RCTY) - Body ground	LG - Body ground	Rear door courtesy light switch assembly (for RH) input	Rear door RH closed	11 to 14 V or Pulse generation
4D-10 (LSFL) - Body ground	GR - Body ground	Front door LH unlock detection switch input	Front door LH unlocked	Below 1 V
4D-10 (LSFL) - Body ground	GR - Body ground	Front door LH unlock detection switch input	Front door LH locked	11 to 14 V or Pulse generation
4D-26 (LSFR) - Body ground	Y - Body ground	Front door RH unlock detection switch input	Front door RH unlocked	Below 1 V
4D-26 (LSFR) - Body ground	Y - Body ground	Front door RH unlock detection switch input	Front door RH locked	11 to 14 V or Pulse generation
F18-2 (LSWR) - Body ground	LG - Body ground	Rear door RH unlock detection switch input	Rear door RH unlocked	Below 1 V
F18-2 (LSWR) - Body ground	LG - Body ground	Rear door RH unlock detection switch input	Rear door RH locked	11 to 14 V or Pulse generation
4H-34 (LSWL) - Body ground	V - Body ground	Rear door LH unlock detection switch input	Rear door LH unlocked	Below 1 V
4H-34 (LSWL) - Body ground	V - Body ground	Rear door LH unlock detection switch input	Rear door LH locked	11 to 14 V or Pulse generation
4H-33 (BCTY) - Body ground	LA-Y - Body ground	Back door courtesy light switch input	Back door open	Below 1 V
4H-33 (BCTY) - Body ground	LA-Y - Body ground	Back door courtesy light switch input	Back door closed	11 to 14 V or Pulse generation
4F-30 (BZR) - Body ground	B - Body ground	Wireless door lock buzzer signal	Wireless door lock buzzer off	Below 1 V
4F-30 (BZR) - Body ground	B - Body ground	Wireless door lock buzzer signal	Wireless door lock buzzer on	Pulse generation

*1: for LHD
*2: for RHD

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Disconnect the F13 certification ECU (smart key ECU assembly) connector.

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

Tech Tips

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F13-11 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F13-10 (+B) - Body ground	GR - Body ground	Battery power supply	Always	11 to 14 V

Reconnect the F13 certification ECU (smart key ECU assembly) connector.

Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F12-18 (RCO) - F13-11 (E)	G - W-B	Output to smart door control receiver assembly (Power supply for smart door control receiver assembly. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.)	Procedure: Engine switch off Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed	Pulse generation (See waveform 1)
F12-19 (CSEL) - F13-11 (E)	GR - W-B	Communication channel switching circuit	Procedure: Engine switch off All doors closed	Below 1 V → 4.5 to 6 V → Below 1 V
F12-20 (RDAM) - F13-11 (E)	P - W-B	Smart door control receiver assembly verifies data received from electrical key transmitter sub-assembly. Smart door control receiver assembly sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Smart door control receiver assembly intermittently grounds 12 V signal from certification ECU (smart key ECU assembly)).	Procedure: Engine switch off All doors locked Electrical key transmitter sub-assembly not inside vehicle Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed	Pulse generation (See waveform 2)

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F12-18 (RCO) - F13-11 (E)

G - W-B

Output to smart door control receiver assembly

(Power supply for smart door control receiver assembly. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.)

Procedure:

Engine switch off
Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area
Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

Pulse generation

(See waveform 1)

F12-19 (CSEL) - F13-11 (E)

GR - W-B

Communication channel switching circuit

Procedure:

Engine switch off
All doors closed

Below 1 V → 4.5 to 6 V → Below 1 V

F12-20 (RDAM) - F13-11 (E)

P - W-B

Smart door control receiver assembly verifies data received from electrical key transmitter sub-assembly.

Smart door control receiver assembly sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Smart door control receiver assembly intermittently grounds 12 V signal from certification ECU (smart key ECU assembly)).

Procedure:

Engine switch off
All doors locked
Electrical key transmitter sub-assembly not inside vehicle
Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area
Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

Pulse generation

(See waveform 2)

*a	Before lock or unlock switch of electrical key transmitter sub-assembly pressed
*b	After lock or unlock switch of electrical key transmitter sub-assembly pressed

Using an oscilloscope, check waveform 1.

Tech Tips

The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Waveform 1 (Reference)
Item	Content
Tester connection	F12-18 (RCO) - F13-11 (E)
Tool setting	2 V/DIV., 500 ms/DIV.
Condition	Procedure: Engine switch off Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

*a	Before lock or unlock switch of electrical key transmitter sub-assembly pressed
*b	After lock or unlock switch of electrical key transmitter sub-assembly pressed

Using an oscilloscope, check waveform 2.

Tech Tips

The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Waveform 2 (Reference)
Item	Content
Tester connection	F12-20 (RDAM) - F13-11 (E)
Tool setting	5 V/DIV., 500 ms/DIV.
Condition	Procedure: Engine switch off All doors locked Electrical key transmitter sub-assembly not inside vehicle Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed