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	-	Auxiliary battery power supply	Power switch off	11 to 14 V
MB-30 (ACC) - Body ground	-	ACC power supply	Power switch on (ACC)	11 to 14 V
MB-30 (ACC) - Body ground	-	ACC power supply	Power switch off	Below 1 V
MB-32 (IG) - Body ground	-	Power switch power supply	Power switch on (IG)	11 to 14 V
MB-32 (IG) - Body ground	-	Power switch power supply	Power 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	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-3 (ACT-) - Body ground	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
4D-10 (ACT-) - Body ground	P - 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
4D-10 (ACT-) - Body ground	P - 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-4 (ACT-) - Body ground	V - 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-4 (ACT-) - Body ground	V - 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 (ACTD) - Body ground	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-2 (ACTD) - Body ground	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
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
4D-8 (ACT+) - Body ground	SB - 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-8 (ACT+) - Body ground	SB - 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-5 (ACT+) - Body ground	GR - 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-5 (ACT+) - Body ground	GR - 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
K2-27 (FRCY) - Body ground	V - Body ground	Front door courtesy light switch RH input	Front door RH open	Below 1 V
K2-27 (FRCY) - Body ground	V - Body ground	Front door courtesy light switch RH input	Front door RH closed	11 to 14 V
K2-6 (FLCY) - Body ground	V - Body ground	Front door courtesy light switch LH input	Front door LH open	Below 1 V
K2-6 (FLCY) - Body ground	V - Body ground	Front door courtesy light switch LH input	Front door LH closed	11 to 14 V
4D-25 (LCTY) - Body ground	BE - Body ground	Rear door courtesy light switch LH input	Rear door LH open	Below 1 V
4D-25 (LCTY) - Body ground	BE - Body ground	Rear door courtesy light switch LH input	Rear door LH closed	Pulse generation
4B-17 (RCTY) - Body ground	BE - Body ground	Rear door courtesy light switch RH input	Rear door RH open	Below 1 V
4B-17 (RCTY) - Body ground	BE - Body ground	Rear door courtesy light switch RH input	Rear door RH closed	Pulse generation
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
K1-2 (LSWR) - Body ground	W - Body ground	Rear door RH unlock detection switch input	Rear door RH unlocked	Below 1 V
K1-2 (LSWR) - Body ground	W - Body ground	Rear door RH unlock detection switch input	Rear door RH locked	Pulse generation
4B-23 (LSWL) - Body ground	L - Body ground	Rear door LH unlock detection switch input	Rear door LH unlocked	Below 1 V
4B-23 (LSWL) - Body ground	L - Body ground	Rear door LH unlock detection switch input	Rear door LH 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

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Disconnect the K137 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
K137-11 (E) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
K137-10 (+B) - Body ground	G - Body ground	Auxiliary battery power supply	Power switch off	11 to 14 V

Reconnect the K137 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
K136-18 (RCO) - K137-11 (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: Power 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)
K136-19 (CSEL) - K137-11 (E)	B - BR	Communication channel switching circuit	Procedure: Power switch off All doors closed	Below 1 V → 4.5 to 6.0 V → Below 1 V
K136-20 (RDAM) - K137-11 (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: Power 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

K136-18 (RCO) - K137-11 (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:

Power 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)

K136-19 (CSEL) - K137-11 (E)

B - BR

Communication channel switching circuit

Procedure:

Power switch off
All doors closed

Below 1 V → 4.5 to 6.0 V → Below 1 V

K136-20 (RDAM) - K137-11 (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:

Power 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	K136-18 (RCO) - K137-11 (E)
Tool setting	2 V/DIV., 500 ms/DIV.
Condition	Procedure: Power 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	K136-20 (RDAM) - K137-11 (E)
Tool setting	5 V/DIV., 500 ms/DIV.
Condition	Procedure: Power 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