WIRELESS DOOR LOCK CONTROL SYSTEM TERMINALS OF ECU

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

Disconnect the MB main body ECU (multiplex network body ECU) connector.

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

Tech Tips

Measure the values on the wire harness side with the connectors 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	-	Engine switch power supply	Engine switch on (IG)	11 to 14 V
MB-32 (IG) - Body ground	-	Engine switch power supply	Engine switch off	Below 1 V

Reconnect the MB main body ECU (multiplex network body ECU) 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
4B-3 (ACT-) - Body ground*1	L - Body ground	Door lock motor unlock drive output (except driver door)	Door control switch (multiplex network master switch assembly) or driver door key cylinder off	Below 1 V
4B-2 (ACT-) - Body ground*2	L - Body ground	Door lock motor unlock drive output (except driver door)		Below 1 V
4B-3 (ACT-) - Body ground*1	L - Body ground	Door lock motor unlock drive output (except driver door)	Door control switch (multiplex network master switch assembly) or driver door key cylinder unlocked	11 to 14 V
4B-2 (ACT-) - Body ground*2	L - Body ground	Door lock motor unlock drive output (except driver door)		11 to 14 V
4B-2 (ACTD) - Body ground*1	L - Body ground	Door lock motor unlock drive output (for driver door)	Door control switch (multiplex network master switch assembly) or driver door key cylinder off	Below 1 V
4B-3 (ACTD) - Body ground*2	L - Body ground	Door lock motor unlock drive output (for driver door)		Below 1 V
4B-2 (ACTD) - Body ground*1	L - Body ground	Door lock motor unlock drive output (for driver door)	Door control switch (multiplex network master switch assembly) or driver door key cylinder unlocked	11 to 14 V
4B-3 (ACTD) - Body ground*2	L - Body ground	Door lock motor unlock drive output (for driver door)		11 to 14 V
4D-7 (ACT+) - Body ground	R - Body ground	Door lock motor lock drive output (all doors)	Door control switch (multiplex network master switch assembly) or driver door key cylinder off	Below 1 V
4D-7 (ACT+) - Body ground	R - Body ground	Door lock motor lock drive output (all doors)	Door control switch (multiplex network master switch assembly) or driver door key cylinder locked	11 to 14 V
4B-6 (ACT+) - Body ground	R - Body ground	Door lock motor lock drive output (all doors)	Door control switch (multiplex network master switch assembly) or driver door key cylinder off	Below 1 V
4B-6 (ACT+) - Body ground	R - Body ground	Door lock motor lock drive output (all doors)	Door control switch (multiplex network master switch assembly) or driver door key cylinder locked	11 to 14 V
O2-27 (FRCY) - Body ground	V - Body ground	Front door courtesy light switch RH input	Front door RH open	Below 1 V
O2-27 (FRCY) - Body ground	V - Body ground	Front door courtesy light switch RH input	Front door RH closed	11 to 14 V
O2-6 (FLCY) - Body ground	V - Body ground	Front door courtesy light switch LH input	Front door LH open	Below 1 V
O2-6 (FLCY) - Body ground	V - Body ground	Front door courtesy light switch LH input	Front door LH closed	11 to 14 V
4B-26 (LSFL) - Body ground	G - Body ground	Front door LH unlock detection switch input	Front door LH unlocked	Below 1 V
4B-26 (LSFL) - Body ground	G - Body ground	Front door LH unlock detection switch input	Front door LH locked	Pulse generation
4B-27 (LSFR) - Body ground	B - Body ground	Front door RH unlock detection switch input	Front door RH unlocked	Below 1 V
4B-27 (LSFR) - Body ground	B - Body ground	Front door RH unlock detection switch input	Front door RH locked	Pulse generation
4D-16 (LGCY) - Body ground	G - Body ground	Luggage door courtesy light switch input	Luggage compartment door open	Below 1 V
4D-16 (LGCY) - Body ground	G - Body ground	Luggage door courtesy light switch input	Luggage compartment door closed	11 to 14 V
4D-1 (TR+) - Body ground	B - Body ground	Luggage compartment door lock motor unlock drive output	Luggage compartment door opener switch (open switch) pushed	11 to 14 V
4D-1 (TR+) - Body ground	B - Body ground	Luggage compartment door lock motor unlock drive output	Luggage compartment door opener switch (open switch) not pushed	Below 1 V

*1: for LHD
*2: for RHD

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Disconnect the O6 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 connectors disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
O6-11 (E) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
O6-10 (+B) - Body ground	BE - Body ground	Battery power supply	Always	11 to 14 V

Terminal No.

(Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

O6-11 (E) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

O6-10 (+B) - Body ground

BE - Body ground

Battery power supply

Always

11 to 14 V

Reconnect the O6 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
O5-18 (RCO) - O6-11 (E)	LG - BR	Output to door control receiver (Power supply for door control receiver. 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)
O5-19 (CSEL) - O6-11 (E)*	B - BR	Communication channel switching circuit	Procedure: Engine switch off All doors closed	Below 1 V → 4.5 to 6.0 V → Below 1 V
O5-20 (RDAM) - O6-11 (E)	R - BR	Door control receiver verifies data received from electrical key transmitter sub-assembly. Door control receiver sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Door control receiver intermittently grounds 12 V signal from certification ECU (smart key ECU assembly)).	Proceed: 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

O5-18 (RCO) - O6-11 (E)

LG - BR

Output to door control receiver

(Power supply for door control receiver. 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)

O5-19 (CSEL) - O6-11 (E)*

B - BR

Communication channel switching circuit

Procedure:

Engine switch off
All doors closed

Below 1 V → 4.5 to 6.0 V → Below 1 V

O5-20 (RDAM) - O6-11 (E)

R - BR

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

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

Proceed:

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)

*: w/ AUTO Indicator in the Recirculation/Fresh Switch

*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	O5-18 (RCO) - O6-11 (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	O5-20 (RDAM) - O6-11 (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