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

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

Text in Illustration
*A	for LHD	*B	for RHD

Disconnect the MB and I12 main body ECU (multiplex network body ECU) connectors.

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.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
MB-11 (GND1) - Body ground	-	Ground	Always	Below 1 Ω
I12-3 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
MB-30 (BECU) - Body ground	-	Battery power supply	Always	11 to 14 V
MB-29 (ACC) - Body ground	-	ACC power supply	Engine switch on (ACC)	11 to 14 V
MB-29 (ACC) - Body ground	-	ACC power supply	Engine switch off	Below 1 V
MB-31 (ALTB) - Body ground	-	Battery power supply	Always	11 to 14 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

Reconnect the MB and I12 main body ECU (multiplex network body ECU) connectors.
Measure the voltage according to the value(s) in the table below.

Check the pulse according to the value(s) in the table below.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
3B-8 (ACT-) - Body ground	V - Body ground1 GR - Body ground2	Door lock motor unlock drive output (except driver door)	Door control switch (multiplex network master switch) or driver door key cylinder off	Below 1 V
3B-8 (ACT-) - Body ground	V - Body ground1 GR - Body ground2	Door lock motor unlock drive output (except driver door)	Door control switch (multiplex network master switch) or driver door key cylinder unlocked	11 to 14 V
3B-3 (ACT+) - Body ground	W - Body ground	Door lock motor lock drive output (all doors)	Door control switch (multiplex network master switch) or driver door key cylinder off	Below 1 V
3B-3 (ACT+) - Body ground	W - Body ground	Door lock motor lock drive output (all doors)	Door control switch (multiplex network master switch) or driver door key cylinder locked	11 to 14 V
3B-4 (ACTD) - Body ground	GR - Body ground1 V - Body ground2	Driver door lock motor unlock drive output	Door control switch (multiplex network master switch) or driver door key cylinder off	Below 1 V
3B-4 (ACTD) - Body ground	GR - Body ground1 V - Body ground2	Driver door lock motor unlock drive output	Door control switch (multiplex network master switch) or driver door key cylinder unlocked	11 to 14 V
3C-15 (FLCY) - Body ground	L - Body ground	Front door LH courtesy light switch input	Front door LH open	Below 1 V
3C-15 (FLCY) - Body ground	L - Body ground	Front door LH courtesy light switch input	Front door LH closed	11 to 14 V
I13-19 (FRCY) - Body ground	Y - Body ground3 SB - Body ground4	Front door RH courtesy light switch input	Front door RH open	Below 1 V
I13-19 (FRCY) - Body ground	Y - Body ground3 SB - Body ground4	Front door RH courtesy light switch input	Front door RH closed	11 to 14 V
I13-1 (LCTY) - Body ground	P - Body ground	Rear door LH courtesy light switch input	Rear door LH open	Below 1 V
I13-1 (LCTY) - Body ground	P - Body ground	Rear door LH courtesy light switch input	Rear door LH closed	Pulse generation
I13-6 (RCTY) - Body ground	B - Body ground	Rear door RH courtesy light switch input	Rear door RH open	Below 1 V
I13-6 (RCTY) - Body ground	B - Body ground	Rear door RH courtesy light switch input	Rear door RH closed	Pulse generation
I13-7 (LSFL) - Body ground	V - Body ground	Front door LH unlock detection switch input	Front door LH unlocked	Below 1 V
I13-7 (LSFL) - Body ground	V - Body ground	Front door LH unlock detection switch input	Front door LH locked	Pulse generation
I13-18 (LSFR) - Body ground	W - Body ground	Front door RH unlock detection switch input	Front door RH unlocked	Below 1 V
I13-18 (LSFR) - Body ground	W - Body ground	Front door RH unlock detection switch input	Front door RH locked	Pulse generation
3A-53 (LSR) - Body ground	Y - Body ground	Rear door RH unlock detection switch input	Rear door RH or LH unlocked	Below 1 V
3A-53 (LSR) - Body ground	Y - Body ground	Rear door RH unlock detection switch input	Engine switch off, all doors closed and rear door RH and LH locked	Pulse generation
3C-17 (LSR) - Body ground	LG - Body ground	Rear door LH unlock detection switch input	Rear door LH or RH unlocked	Below 1 V
3C-17 (LSR) - Body ground	LG - Body ground	Rear door LH unlock detection switch input	Engine switch off, all doors closed and rear door LH and RH locked	Pulse generation
3D-22 (BZR) - Body ground	BE - Body ground	Wireless door lock buzzer signal	Wireless door lock buzzer off	Below 1 V
3D-22 (BZR) - Body ground	BE - Body ground	Wireless door lock buzzer signal	Wireless door lock buzzer on	Pulse generation

*1: for LHD
*2: for RHD
*3: except TMMK Made
*4: for TMMK Made

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Disconnect the A43 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.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
A43-11 (E) - Body ground	W - Body ground	Ground	Always	Below 1 Ω
A43-2 (+B) - Body ground	W - Body ground	Battery power supply	Always	11 to 14 V
A43-10 (CUTB) - Body ground	L - Body ground	Dark current cut fuse pin input signal	Always	11 to 14 V

Reconnect the A43 certification ECU (smart key ECU assembly) connector.

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
I78-5 (IG) - A43-11 (E)	LG - W	IG power supply	Engine switch on (IG)	11 to 14 V
I78-5 (IG) - A43-11 (E)	LG - W	IG power supply	Engine switch off	Below 1 V
O1-6 (CSEL) - A43-11 (E)	LG - W	Communication channel switching circuit	Engine switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed → electrical key transmitter sub-assembly switch released	Below 1 V → 4.5 to 6.0 V → Below 1 V
O1-17 (RDAM) - A43-11 (E)	Y - W	RF Signal input circuit	Engine switch off	11 to 14 V pulse generation at regular intervals
O1-5 (RCO) - A43-11 (E)	G - W	Wireless tuner power supply output circuit	Engine switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed	Below 1 V → 4.5 to 5.5 V

CHECK DOOR CONTROL RECEIVER

*1: except TMMK Made
*2: for TMMK Made

Disconnect the O45*1 or O25*2 door control receiver connector.

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

Tech Tips

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
O45-1 (GND) - Body ground1 O25-1 (GND) - Body ground2	BR - Body ground	Ground	Always	Below 1 Ω

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

O45-1 (GND) - Body ground*1

O25-1 (GND) - Body ground*2

BR - Body ground

Ground

Always

Below 1 Ω

*1: except TMMK Made
*2: for TMMK Made

Reconnect the O45*1 or O25*2 door control receiver connector.

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
O45-2 (CSEL) - O45-1 (GND)1 O25-2 (CSEL) - O25-1 (GND)2	LG - BR	Smart system receiving channel switching signal input	Engine switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed → electrical key transmitter sub-assembly switch released	Below 1 V → 4.5 to 6.0 V → Below 1 V
O45-5 (DATA) - O45-1 (GND)1 O25-5 (DATA) - O25-1 (GND)2	Y - BR	Smart system recovery code output	Engine switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed → electrical key transmitter sub-assembly switch released	Below 1 V → 10 to 16 V → Below 1 V
O45-4 (+5) - O45-1 (GND)1 O25-4 (+5) - O25-1 (GND)2	G - BR	Receive mode switching signal input	Engine switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed	Below 1 V → 4.5 to 5.5 V

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

O45-2 (CSEL) - O45-1 (GND)*1

O25-2 (CSEL) - O25-1 (GND)*2

LG - BR

Smart system receiving channel switching signal input

Engine switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed → electrical key transmitter sub-assembly switch released

Below 1 V → 4.5 to 6.0 V → Below 1 V

O45-5 (DATA) - O45-1 (GND)*1

O25-5 (DATA) - O25-1 (GND)*2

Y - BR

Smart system recovery code output

Below 1 V → 10 to 16 V → Below 1 V

O45-4 (+5) - O45-1 (GND)*1

O25-4 (+5) - O25-1 (GND)*2

G - BR

Receive mode switching signal input

Engine switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed

Below 1 V → 4.5 to 5.5 V

*1: except TMMK Made
*2: for TMMK Made