THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): TERMINALS OF ECU; 2019 - 2022 MY Avalon [04/2018

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001AREV
Model Year Start: 2019	Model: Avalon	Prod Date Range: [04/2018 - ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): TERMINALS OF ECU; 2019 - 2022 MY Avalon [04/2018 - ]

TERMINALS OF ECU

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.

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

Tester Connection	Wiring Color	Input/Output	Terminal Description	Condition	Specified Condition
G40-18 (E) - Body ground	W-B - Body ground	-	Ground	Always	Below 1 Ω
G40-4 (+B) - G40-18 (E)	W - W-B	Input	Power supply	Always	11 to 14 V
G40-15 (CUTB) - G40-18 (E)	R - W-B	Input	Dark current cut pin*	Always	11 to 14 V

*: In order to prevent the vehicle battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is installed in the circuit. If the fuse is removed, the circuit becomes open. If the fuse that is between the vehicle battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode (example: the transmission of radio waves every 0.25 seconds, which form the detection area, stops).

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

Tester Connection	Wiring Color	Input/Output	Terminal Description	Condition	Specified Condition
G40-17 (IG1D) - G40-18 (E)	R - W-B	Output	IG power supply	Engine switch off → on (IG)	Below 1 V → 10 V or higher
K10-17 (CLG1) - G40-18 (E)	R - W-B	Output	Output to driver door electrical key antenna (request signal (challenge) is sent to door electrical key antenna from certification ECU (smart key ECU assembly) to form detection area)	Procedure: Engine switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*)	Pulse generation (See waveform 1)
K10-17 (CLG1) - G40-18 (E)	R - W-B	Output		Procedure: Engine switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*)	Pulse generation (See waveform 2)
K10-17 (CLG1) - G40-18 (E)	R - W-B	Input	Input to driver door lock sensor (front door outside handle assembly (for driver door) lock sensor on signal is sent to the certification ECU (smart key ECU assembly))	Procedure: Engine switch off Electrical key transmitter sub-assembly brought outside vehicle All doors closed All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) Driver door lock sensor touched	Pulse generation (See waveform 3)
K10-17 (CLG1) - G40-18 (E)	R - W-B	Input	Input to driver door unlock sensor (when system is in unlock standby mode and unlock sensor is touched, door electrical key antenna sends unlock sensor input signal (sensing) to certification ECU (smart key ECU assembly))	Procedure: Engine switch off Electrical key transmitter sub-assembly brought outside vehicle All doors locked Electrical key transmitter sub-assembly not near the vehicle Driver door unlock sensor touched	Pulse generation (See waveform 4)
K10-16 (CG1B) - G40-18 (E)	GR - W-B	Output	Output to driver door electrical key antenna (terminal on opposite side of component from CLG1 output terminal)	Procedure: Engine switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*)	Pulse generation (See waveform 5)
K10-16 (CG1B) - G40-18 (E)	GR - W-B	Output		Procedure: Engine switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*)	Pulse generation (See waveform 6)
K10-15 (CLG2) - G40-18 (E)	R - W-B	Output	Output to front passenger door electrical key antenna (request signal (challenge) is sent to door electrical key antenna from certification ECU (smart key ECU assembly) to form detection area)	Procedure: Engine switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*)	Pulse generation (See waveform 1)
K10-15 (CLG2) - G40-18 (E)	R - W-B	Output		Procedure: Engine switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*)	Pulse generation (See waveform 2)
K10-15 (CLG2) - G40-18 (E)	R - W-B	Input	Input to front passenger door lock sensor (front door outside handle assembly (for front passenger door) lock sensor on signal is sent to the certification ECU (smart key ECU assembly))	Procedure: Engine switch off Electrical key transmitter sub-assembly brought outside vehicle All doors closed All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) Front passenger door lock sensor touched	Pulse generation (See waveform 3)
K10-15 (CLG2) - G40-18 (E)	R - W-B	Input	Input to front passenger door unlock sensor (when system is in unlock standby mode and unlock sensor is touched, door electrical key antenna sends unlock sensor input signal (sensing) to certification ECU (smart key ECU assembly))	Procedure: Engine switch off Electrical key transmitter sub-assembly brought outside vehicle All doors locked Electrical key transmitter sub-assembly not near the vehicle Front passenger door unlock sensor touched	Pulse generation (See waveform 4)
K10-14 (CG2B) - G40-18 (E)	W - W-B	Output	Output to front passenger door electrical key antenna (terminal on opposite side of component from CLG2 output terminal)	Procedure: Engine switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*)	Pulse generation (See waveform 5)
K10-14 (CG2B) - G40-18 (E)	W - W-B	Output		Procedure: Engine switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*)	Pulse generation (See waveform 6)
K10-11 (CLG7) - G40-18 (E)	GR - W-B	Output	Output to No. 1 indoor electrical key antenna assembly (inside luggage compartment)	Procedure: Door is closed Engine switch off Electrical key transmitter sub-assembly not inside vehicle Driver door lock sensor touched	Pulse generation (See waveform 7)
K10-10 (CG7B) - G40-18 (E)	R - W-B	Output	Output to No. 1 indoor electrical key antenna assembly (inside luggage compartment) (terminal on opposite side of component from CLG7 output terminal)	Procedure: Door is closed Engine switch off Electrical key transmitter sub-assembly not inside vehicle Driver door lock sensor touched	Pulse generation (See waveform 7)
K10-13 (CLG8) - G40-18 (E)	G - W-B	Output	Output to electrical key antenna (outside luggage compartment)	Procedure: Engine switch off Electrical key transmitter sub-assembly brought outside vehicle All doors closed Luggage electrical key switch off → on	Pulse generation (See waveform 8)
K10-12 (CG8B) - G40-18 (E)	L - W-B	Output	Output to electrical key antenna (outside luggage compartment) (terminal on opposite side of component from CLG8 output terminal)	Procedure: Engine switch off Electrical key transmitter sub-assembly brought outside vehicle All doors closed Luggage electrical key switch off → on	Pulse generation (See waveform 8)
K10-26 (TSW5) - G40-18 (E)	LG - W-B	Input	Luggage electrical key switch signal input	Luggage electrical key switch off → on	Pulse generation (See waveform 9)
K10-18 (RCO) - G40-18 (E)	B - W-B	Output	Output to electrical key and tire pressure monitoring system receiver assembly (Power supply for electrical key and tire pressure monitoring system 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 10)
K10-19 (RDAM) - G40-18 (E)	G - W-B	Input	Electrical key and tire pressure monitoring system receiver assembly verifies data received from electrical key transmitter sub-assembly. Electrical key and tire pressure monitoring system receiver assembly sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Electrical key and tire pressure monitoring system receiver assembly 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 11)
K10-20 (CSEL) - G40-18 (E)	BE - W-B	Output	Communication channel switching circuit	Procedure: Engine switch off All doors closed	Below 1 V → Pulse generation

*: For details about the entry function detection area, refer to Operation Check.
Click here

(e) Using an oscilloscope, check waveform 1.

NOTICE:

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

K10-17 (CLG1) - G40-18 (E)

K10-15 (CLG2) - G40-18 (E)

Tool Setting

5 V/DIV., 500 ms/DIV.

Condition

Procedure:

Engine switch off
All doors closed
Electrical key transmitter sub-assembly not inside vehicle
All doors locked through wireless operation
(electrical key transmitter sub-assembly brought inside detection area*)

*: For details about the entry function detection area, refer to Operation Check.
Click here

(f) Using an oscilloscope, check waveform 2.

NOTICE:

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

K10-17 (CLG1) - G40-18 (E)

K10-15 (CLG2) - G40-18 (E)

Tool Setting

5 V/DIV., 100 ms/DIV.

Condition

Procedure:

Engine switch off
All doors closed
Electrical key transmitter sub-assembly not inside vehicle
All doors locked through wireless operation
(electrical key transmitter sub-assembly brought outside detection area*)

*: For details about the entry function detection area, refer to Operation Check.
Click here

(g) Using an oscilloscope, check waveform 3.

NOTICE:

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

*a	Lock sensor not touched
*b	Lock sensor touched

Waveform 3 (Reference)

Item

Content

Tester Connection

K10-17 (CLG1) - G40-18 (E)

K10-15 (CLG2) - G40-18 (E)

Tool Setting

5 V/DIV., 40 ms/DIV.

Condition

Procedure:

Engine switch off
Electrical key transmitter sub-assembly brought outside vehicle
All doors closed
All doors locked through wireless operation
(electrical key transmitter sub-assembly brought outside detection area*)
Lock sensor not touched → touched

*: For details about the entry function detection area, refer to Operation Check.
Click here

(h) Using an oscilloscope, check waveform 4.

NOTICE:

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

*a	Unlock sensor not touched
*b	Unlock sensor touched

Waveform 4 (Reference)

Item

Content

Tester Connection

K10-17 (CLG1) - G40-18 (E)

K10-15 (CLG2) - G40-18 (E)

Tool Setting

5 V/DIV., 50 ms/DIV.

Condition

Procedure:

Engine switch off
Electrical key transmitter sub-assembly brought outside vehicle
All doors locked
Electrical key transmitter sub-assembly not near the vehicle
Unlock sensor not touched → touched

(i) Using an oscilloscope, check waveform 5.

NOTICE:

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

Waveform 5 (Reference)

Item

Content

Tester Connection

K10-16 (CG1B) - G40-18 (E)

K10-14 (CG2B) - G40-18 (E)

Tool Setting

5 V/DIV., 500 ms/DIV.

Condition

Procedure:

Engine switch off
All doors closed
Electrical key transmitter sub-assembly not inside vehicle
All doors locked through wireless operation
(electrical key transmitter sub-assembly brought inside detection area*)

*: For details about the entry function detection area, refer to Operation Check.
Click here

(j) Using an oscilloscope, check waveform 6.

NOTICE:

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

Waveform 6 (Reference)

Item

Content

Tester Connection

K10-16 (CG1B) - G40-18 (E)

K10-14 (CG2B) - G40-18 (E)

Tool Setting

5 V/DIV., 100 ms/DIV.

Condition

Procedure:

Engine switch off
All doors closed
Electrical key transmitter sub-assembly not inside vehicle
All doors locked through wireless operation
(electrical key transmitter sub-assembly brought outside detection area*)

*: For details about the entry function detection area, refer to Operation Check.
Click here

(k) Using an oscilloscope, check waveform 7.

NOTICE:

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

*a	Driver door lock sensor not touched
*b	Driver door lock sensor touched

Waveform 7 (Reference)

Item

Content

Tester Connection

K10-11 (CLG7) - G40-18 (E)

K10-10 (CG7B) - G40-18 (E)

Tool Setting

2 V/DIV., 500 ms/DIV.

Condition

Procedure:

Door is closed
Engine switch off
Electrical key transmitter sub-assembly not inside vehicle
Driver door lock sensor touched

(l) Using an oscilloscope, check waveform 8.

NOTICE:

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

Waveform 8 (Reference)

Item

Content

Tester Connection

K10-13 (CLG8) - G40-18 (E)

K10-12 (CG8B) - G40-18 (E)

Tool Setting

2 V/DIV., 500 ms/DIV.

Condition

Procedure:

Engine switch off
Electrical key transmitter sub-assembly brought outside vehicle
All doors closed
Luggage electrical key switch off → on

(m) Using an oscilloscope, check waveform 9.

NOTICE:

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

*a	Checking for switch on signal at short intervals

Waveform 9 (Reference)

Item	Content
Tester Connection	K10-26 (TSW5) - G40-18 (E)
Tool Setting	2 V/DIV., 500 ms/DIV.
Condition	Luggage electrical key switch off → on

(n) Using an oscilloscope, check waveform 10.

NOTICE:

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

*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

Waveform 10 (Reference)

Item	Content
Tester Connection	K10-18 (RCO) - G40-18 (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

(o) Using an oscilloscope, check waveform 11.

NOTICE:

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

*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

Waveform 11 (Reference)

Item	Content
Tester Connection	K10-19 (RDAM) - G40-18 (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

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

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

Click here

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

Tester Connection	Wiring Color	Input/Output	Terminal Description	Condition	Specified Condition
MB-11 (GND1) - Body ground	-	-	Ground	Always	Below 1 Ω
MB-31 (BECU) - Body ground	-	Input	Battery power supply (for CPU)	Always	11 to 14 V