Toyota Avalon (XX50): Terminals Of Ecu

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System(for Start Function, Gasoline Model) / Terminals Of Ecu

TERMINALS OF ECU

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the A10, K10 and G40 certification ECU (smart key ECU assembly) connectors.

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

HINT:

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

Tester Connection	Wiring Color	Input / Output	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
A10-16 (NE) - Body ground	G - Body ground	Input	Engine speed signal	Always	10 kΩ or higher	Engine Condition
K10-25 (STP1) - Body ground	BE - Body ground	Input	Stop light switch signal	Brake pedal depressed → Brake pedal released	9 V or higher → 1 V or less	Stop Light Switch1
G40-4 (+B) - G40-18 (E)	W - W-B	Input	Power source	Always	11 to 14 V	-
G40-22 (P) - G40-18 (E)	R - W-B	Input	P position signal	Shift lever in P → Shift lever not in P	30 kΩ or higher → Below 200 Ω	Shift P Signal
G40-15 (CUTB) - Body ground	R - Body ground	Input	Dark current cut pin*	Always	11 to 14 V	-
G40-18 (E) - Body ground	W-B - Body ground	-	GND	Always	Below 1 Ω	-
G40-21 (SSW2) - Body ground	L - Body ground	Input	SSW2 contact signal HINT: Backup for SSW1. Behaves the same way as SSW1.	Engine switch pushed → Engine switch not pushed	Below 15 Ω → 10 kΩ or higher	Start Switch2
G40-23 (SSW1) - Body ground	GR - Body ground	Input	SSW1 contact signal	Engine switch pushed → Engine switch not pushed	Below 15 Ω → 10 kΩ or higher	Start Switch1
G40-19 (SPD) - Body ground	R - Body ground	Input	Vehicle speed signal	Always	30 kΩ or higher	Vehicle Speed Signal

*: 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 resistance, and check for pulses according to the value(s) in the table below.

Tester Connection	Wiring Color	Input / Output	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
A10-20 (STA) - G40-18 (E)	L - W-B	Input	When starting the engine, this monitors the voltage sent from terminal STAR to the starter relay to judge whether the engine is "being started".	Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)	6 V or higher*2 → 1.0 V or less	-
A10-9 (STAR) - G40-18 (E)	P - W-B	Input / Output	Outputs voltage to the starter relay Outputs voltage (12 V) to the starter relay when starting the engine. (Max. 30 sec. Turns off when an engine speed of 1000 rpm.) HINT: When Hi is selected, a start request signal (STAR) will not be output even though a start request signal (STSW) is input.	Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)	6 V or higher*2 → 1.0 V or less	-
A10-9 (STAR) - G40-18 (E)	P - W-B	Input / Output	Receives neutral start switch (P, N position detection) signal Monitors whether the neutral start switch is on (P or N) or off (other than P or N). Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the neutral start switch is on, due to the starter relay coil resistance (small) using some of the voltage, the voltage at terminal STAR will be low (2.7 V or less), and when the neutral start switch is off, the voltage will be high (9 V or more).	Perform the following operations except while the engine is cranking: Shift lever in any position other than P or N → Shift lever in P or N (at 20°C (68°F))	9 V or higher → 2.7 V or less	Neutral SW/ Clutch SW
A10-16 (NE) - G40-18 (E)	G - W-B	Input	Engine speed signal	Idling (engine warmed up)	Pulse generation (See waveform 1)	Engine Condition
K10-25 (STP1) - G40-18 (E)	BE - W-B	Input	Stop light switch signal	Brake pedal released → Brake pedal depressed	1 V or less → 9 V or higher	Stop Light Switch1
G40-14 (SLP) - G40-18 (E)	G - W-B	Input	Steering lock position signal	Steering locked → Steering unlocked	11 to 14 V → 1.5 V or less	Steering Unlock Switch
G40-25 (SLR+) - G40-18 (E)	W - W-B	Output	Steering lock motor operation command signal (Steering lock motor operation permission signal sent from the certification ECU (smart key ECU assembly))	When a door is opened, the steering lock motor will be operated if all of the following conditions are met: The steering is unlocked. The engine switch is off. The shift lever is in P.	Pulse generation (See waveform 2)	-
G40-13 (LIN) - G40-18 (E)	B - W-B	Input / Output	LIN communication line	Engine switch on (IG)	Pulse generation	Steering Lock Start Cond
G40-22 (P) - G40-18 (E)	R - W-B	Input	P position signal	Shift lever in P → Shift lever not in P	9 V or higher → 2.76 V or less	Shift P Signal
G40-21 (SSW2) - G40-18 (E)	L - W-B	Input	SSW2 contact signal HINT: Backup for SSW1. Behaves the same way as SSW1.	Engine switch not pushed → Engine switch pushed	9 V or higher → 1 V or less	Start Switch2
G40-23 (SSW1) - G40-18 (E)	GR - W-B	Input	SSW1 contact signal	Engine switch not pushed → Engine switch pushed	9 V or higher → 1 V or less	Start Switch1
G40-16 (ACCD) - G40-18 (E)	LG - W-B	Output	ACC signal	Engine switch off → Engine switch on (ACC)	1 V or less → 8.5 V or higher	ACC Relay Monitor
G40-17 (IG1D) - G40-18 (E)	R - W-B	Output	IG signal	Engine switch on (ACC) → Engine switch on (IG)	1 V or less → 9 V or higher	IG Relay Monitor (Outside)
G40-19 (SPD) - G40-18 (E)	R - W-B	Input	Vehicle speed signal	Vehicle being driven at approx. 5 km/h (3 mph)	Pulse generation (See waveform 3)	Vehicle Speed Signal
G40-8 (CLG5) - G40-18 (E)	B - W-B	Output	Output to No. 1 indoor electrical key antenna assembly (front floor)	Procedure: Engine switch off Electrical key transmitter sub-assembly not inside vehicle Within 30 seconds of closing any door	Pulse generation (See waveform 4)	-
G40-9 (CG5B) - G40-18 (E)	LG - W-B	Output	Output to No. 1 indoor electrical key antenna assembly (front floor) (terminal on opposite side of component from CLG5 output terminal)	Procedure: Engine switch off Electrical key transmitter sub-assembly not inside vehicle Within 30 seconds of closing any door	Pulse generation (See waveform 4)	-
K10-5 (CLG6) - G40-18 (E)	W - W-B	Output	Output to No. 1 indoor electrical key antenna assembly (rear floor)	Procedure: Engine switch off Electrical key transmitter sub-assembly not inside vehicle Within 30 seconds of closing any door	Pulse generation (See waveform 4)	-
K10-6 (CG6B) - G40-18 (E)	R - W-B	Output	Output to No. 1 indoor electrical key antenna assembly (rear floor) (terminal on opposite side of component from CLG6 output terminal)	Procedure: Engine switch off Electrical key transmitter sub-assembly not inside vehicle Within 30 seconds of closing any door	Pulse generation (See waveform 4)	-
G40-5 (TXCT) - G40-11 (AGND)	GR - BE	Output	Signal output to transponder key amplifier	Engine switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed	Below 1 V	BCC Malfunction Abnormal Status Different Encrypt Code Different Serial Number Frame Error Response
G40-6 (CODE) - G40-11 (AGND)	B - BE	Input	Signal input from transponder key amplifier	Engine switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed	Below 1 V
G40-7 (VC5) - G40-11 (AGND)	BE - BE	Output	Transponder key amplifier power supply	Engine switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed	Below 1 V
G40-11 (AGND) - Body ground	BE - Body ground	-	Transponder key amplifier ground	Always	Below 1 Ω
G40-5 (TXCT) - G40-11 (AGND)	GR - BE	Output	Signal output to transponder key amplifier (Code sent from certification ECU (smart key ECU assembly) to transponder key amplifier built into engine switch, and then transmitted by transponder key amplifier antenna as radio waves)	Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed	Pulse generation (See waveform 5)	BCC Malfunction Abnormal Status Different Encrypt Code Different Serial Number Frame Error Response
G40-6 (CODE) - G40-11 (AGND)	B - BE	Input	Signal input from transponder key amplifier (Radio waves from transponder key amplifier built into engine switch used to detect key information. Key information then sent to certification ECU (smart key ECU assembly))	Engine switch off, engine switch pressed with electrical key transmitter sub-assembly held near engine switch HINT: Remove the transmitter battery before performing this inspection.	Pulse generation (See waveform 6)
G40-7 (VC5) - G40-11 (AGND)	BE - BE	Output	Transponder key amplifier power supply (Power supplied from certification ECU (smart key ECU assembly) when transponder key amplifier built into engine switch activated)	Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed	Pulse generation (See waveform 7)
A10-3 (EFII) - G40-18 (E)	V - W-B	Input	EFI communication input (Signal input from ECM to certification ECU (smart key ECU assembly))	Engine switch off	11 to 14 V	B279986 B279A12 EFI Code Receive Engine Start Request
A10-4 (EFIO) - G40-18 (E)	GR - W-B	Output	EFI communication output (Signal output from certification ECU (smart key ECU assembly) to ECM)	Engine switch off	11 to 14 V → 1 V or less
A10-3 (EFII) - G40-18 (E)	V - W-B	Input	EFI communication input (Signal input from ECM to certification ECU (smart key ECU assembly))	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after cable disconnected and reconnected to battery	Pulse generation (See waveform 8)
A10-4 (EFIO) - G40-18 (E)	GR - W-B	Output	EFI communication output (Signal output from certification ECU (smart key ECU assembly) to ECM)	Engine switch turned on (IG) using registered electrical key transmitter sub-assembly	Pulse generation (See waveform 9)
G40-20 (IND) - G40-18 (E)	W - W-B	Output	Security indicator output	Engine switch off → on (IG)	Pulse generation → Below 2 V	-
K10-7 (WCSW) - G40-18 (E)*1	LG - W-B	Output	Wireless charger system stop signal	Procedure: Engine switch off Electrical key transmitter sub-assembly inside vehicle Engine switch off → on (ACC)	Below 1 V → 4.5 to 6 V (For 1 second after engine switch on (ACC))	-

*1: w/ Wireless Charging System

HINT:

*2: While the engine is cranking, the battery voltage may drop to approximately 6 V.
The waveform of the steering lock actuator motor stopped can be checked without performing any particular operation.
The waveform of the steering lock actuator motor operating can be checked if either of the following operations is performed:
- To unlock the steering, bring the electrical key transmitter sub-assembly into the cabin and turn the engine switch on (ACC) or on (IG).
- To lock the steering, open a door with the engine switch off and the shift lever in P.

(e) Using an oscilloscope, check the waveform of the ECU.

NOTICE:

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

(1) Waveform 1

Measurement Condition

Item	Content
Tester Connection	A10-16 (NE) - G40-18 (E)
Tool Setting	2 V/DIV., 2 ms./DIV.
Condition	Idling (engine warmed up)

HINT:

The wavelength becomes shorter as the engine speed increases.

(2) Waveform 2

*a	Steering lock motor not operating
*b	Steering lock motor operating

Measurement Condition

Item	Content
Tester Connection	G40-25 (SLR+) - G40-18(E)
Tool Setting	2 V/DIV., 200 ms./DIV.
Condition	When a door is opened, the steering lock motor will be operated if all of the following conditions are met: The steering is unlocked. The engine switch is off. The shift lever is in P.

Item

Content

Tester Connection

G40-25 (SLR+) - G40-18(E)

Tool Setting

2 V/DIV., 200 ms./DIV.

Condition

When a door is opened, the steering lock motor will be operated if all of the following conditions are met:

The steering is unlocked.
The engine switch is off.
The shift lever is in P.

(3) Waveform 3

Measurement Condition

Item	Content
Tester Connection	G40-19 (SPD) - G40-18(E)
Tool Setting	5 V/DIV., 20 ms./DIV.
Condition	Vehicle being driven at approx. 5 km/h (3 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

(4) Waveform 4

*a	For 30 seconds after any door closed
*b	After 30 seconds or more have elapsed since any door closed

Measurement Condition

Item	Content
Tester Connection	G40-8 (CLG5) - G40-18 (E) G40-9 (CG5B) - G40-18 (E) K10-5 (CLG6) - G40-18 (E) K10-6 (CG6B) - G40-18 (E)
Tool Setting	2 V/DIV., 500 ms/DIV.
Condition	Procedure: Engine switch off Electrical key transmitter sub-assembly not inside vehicle Within 30 seconds of closing any door

Item

Content

Tester Connection

G40-8 (CLG5) - G40-18 (E)

G40-9 (CG5B) - G40-18 (E)

K10-5 (CLG6) - G40-18 (E)

K10-6 (CG6B) - G40-18 (E)

Tool Setting

2 V/DIV., 500 ms/DIV.

Condition

Procedure:

Engine switch off
Electrical key transmitter sub-assembly not inside vehicle
Within 30 seconds of closing any door

(5) Waveform 5

Measurement Condition

Item	Content
Tester Connection	G40-5 (TXCT) - G40-11 (AGND)
Tool Setting	2 V/DIV., 20 ms./DIV.
Condition	Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed

(6) Waveform 6

*a	Waveform
*b	Waveform (detail)

Measurement Condition

Item	Content
Tester Connection	G40-6 (CODE) - G40-11 (AGND)
Tool Setting	Waveform 1 V/DIV., 20 ms./DIV. Waveform (detail) 2 V/DIV., 100 μs./DIV.
Condition	Engine switch off, engine switch pressed with electrical key transmitter sub-assembly held near engine switch*

HINT:

*: Remove the transmitter battery before performing this inspection.

(7) Waveform 7

Measurement Condition

Item	Content
Tester Connection	G40-7 (VC5) - G40-11 (AGND)
Tool Setting	2 V/DIV., 200 ms./DIV.
Condition	Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed

(8) Waveform 8

Approximately 160 ms.

Approximately 270 ms.

Measurement Condition

Item	Content
Tester Connection	A10-3 (EFII) - G40-18 (E)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after cable disconnected and reconnected to battery

(9) Waveform 9

Approximately 160 ms.

Approximately 270 ms.

Measurement Condition

Item	Content
Tester Connection	A10-4 (EFIO) - G40-18 (E)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Engine switch turned on (IG) using registered electrical key transmitter sub-assembly

CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

(a) Disconnect the G43 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

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

HINT:

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

Terminal No. (Symbol)	Wiring Color	Input / Output	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
G43-1 (GND) - Body ground	W-B - Body ground	-	Ground	Always	Below 1 Ω	-
G43-6 (IG2) - G43-1 (GND)	LG - W-B	Input	IG signal (IG2 power supply input for steering lock motor)	Engine switch off	Below 1 V	-
G43-6 (IG2) - G43-1 (GND)	LG - W-B	Input	IG signal (IG2 power supply input for steering lock motor)	Engine switch on (IG)	11 to 14 V	-
G43-7 (B) - Body ground	W - Body ground	Input	Constant power supply	Always	11 to 14 V	-

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

Terminal No. (Symbol)	Wiring Color	Input / Output	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
G43-3 (IGE) - G43-1 (GND)	W - W-B	Input	Steering lock motor operation permission signal (motor operation permission signal supplied by certification ECU (smart key ECU assembly))	Steering lock motor operating when all conditions met, and then door opened: Shift lever in P Steering unlocked Engine switch turned off	Pulse generation (See waveform 1)	Power Supply Short Unlock Request Receive Lock Request Receive
G43-4 (SLP1) - G43-1 (GND)	BE - W-B	Output	Steering lock bar position signal (signal output from steering unlock sensor)	Steering locked → unlocked	11 to 14 V → Below 1.5 V	Sensor Value
G43-5 (LIN) - G43-1 (GND)	B - W-B	Input / Output	LIN communication line	Engine switch on (IG)	Pulse generation	Steering Lock Start Cond

Terminal No. (Symbol)

Wiring Color

Input / Output

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

G43-3 (IGE) - G43-1 (GND)

W - W-B

Input

Steering lock motor operation permission signal (motor operation permission signal supplied by certification ECU (smart key ECU assembly))

Steering lock motor operating when all conditions met, and then door opened:

Shift lever in P
Steering unlocked
Engine switch turned off

Pulse generation

(See waveform 1)

Power Supply Short
Unlock Request Receive
Lock Request Receive

G43-4 (SLP1) - G43-1 (GND)

BE - W-B

Output

Steering lock bar position signal (signal output from steering unlock sensor)

Steering locked → unlocked

11 to 14 V → Below 1.5 V

Sensor Value

G43-5 (LIN) - G43-1 (GND)

B - W-B

Input / Output

LIN communication line

Engine switch on (IG)

Pulse generation

Steering Lock Start Cond

HINT:

There is 1 motor and 2 sensors built into the steering lock actuator or upper bracket assembly.
When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.
In order to take measurements when the lock motor is operating, perform either of the following operations:
- To unlock the steering, carry the key and turn the engine switch on (ACC) or on (IG).
- To lock the steering, turn the engine switch off with the shift lever in P, and then open a door.

(e) Using an oscilloscope, check the waveform.

NOTICE:

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

(1) Waveform 1 (Reference)

*a	Steering lock motor not operating
*b	Steering lock motor operating

Measurement Condition

Item	Content
Tester Connection	G43-3 (IGE) - G43-1 (GND)
Tool Setting	2 V/DIV., 200 ms./DIV.
Condition	Steering lock motor operating when all conditions met, and then door opened: Shift lever in P Steering unlocked Engine switch turned off

Item

Content

Tester Connection

G43-3 (IGE) - G43-1 (GND)

Tool Setting

2 V/DIV., 200 ms./DIV.

Condition

Steering lock motor operating when all conditions met, and then door opened:

Shift lever in P
Steering unlocked
Engine switch turned off

CHECK ECM

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

Terminal No. (Symbol)	Wiring Color	Input / Output	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
A18-3 (+B2) - C56-53 (E1)	L - W-B	Input	Ignition power supply	Engine switch on (IG)	11 to 14 V	-
A18-2 (+B) - C56-53 (E1)	L - W-B	Input	Ignition power supply	Engine switch on (IG)	11 to 14 V	-
A18-46 (MREL) - C56-53 (E1)	W - W-B	Input	Ignition power supply	Engine switch on (IG)	11 to 14 V	-
A18-1 (BATT) - C56-53 (E1)	R - W-B	Input	+B power supply	Always	11 to 14 V	-
C56-53 (E1) - Body ground	W-B - Body ground	-	Ground	Always	Below 1 Ω	-
A18-45 (IMO) - C56-53 (E1)	V - W-B	Output	Certification ECU (smart key ECU assembly) communication output	Engine switch off	11 to 14 V	-
A18-45 (IMO) - C56-53 (E1)	V - W-B	Output	Certification ECU (smart key ECU assembly) communication output	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after cable disconnected and reconnected to battery	Pulse generation (See waveform 1)	-
A18-59 (IMI) - C56-53 (E1)	GR - W-B	Input	Certification ECU (smart key ECU assembly) communication input	Engine switch off	11 to 14 V → 1 V or less	-
A18-59 (IMI) - C56-53 (E1)	GR - W-B	Input	Certification ECU (smart key ECU assembly) communication input	Engine switch turned on (IG) using registered electrical key transmitter sub-assembly	Pulse generation (See waveform 2)	-

(b) Using an oscilloscope, check the waveform.

NOTICE:

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

(1) Waveform 1 (Reference)

Approximately 160 ms.

Approximately 270 ms.

Measurement Condition

Item	Content
Tester Connection	A18-45 (IMO) - C56-53 (E1)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after cable disconnected and reconnected to battery

(2) Waveform 2 (Reference)

Approximately 160 ms.

Approximately 270 ms.

Measurement Condition

Item	Content
Tester Connection	A18-59 (IMI) - C56-53 (E1)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Engine switch turned on (IG) using registered electrical key transmitter sub-assembly

CHECK ENGINE SWITCH

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

Terminal No. (Symbol)	Wiring Color	Input / Output	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
G41-6 (AGND) - Body ground	BE - Body ground	-	Transponder key amplifier ground	Always	Below 1 Ω	-
G41-7 (TXCT) - G41-6 (AGND)	GR - BE	Input	Immobiliser communication input	Engine switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed	Below 1 V	-
G41-8 (CODE) - G41-6 (AGND)	B - BE	Output	Immobiliser communication output	Engine switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed	Below 1 V	-
G41-10 (VC5) - G41-6 (AGND)	BE - BE	Input	Transponder key amplifier power supply	Engine switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed	Below 1 V	-

(b) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Input / Output	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
G41-7 (TXCT) - G41-6 (AGND)	GR - BE	Input	Signal input from certification ECU (smart key ECU assembly) (Code sent from certification ECU (smart key ECU assembly) to transponder key amplifier built into engine switch, and then transmitted by transponder key amplifier antenna as radio waves)	Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed	Pulse generation (See waveform 1)	BCC Malfunction Abnormal Status Different Encrypt Code Different Serial Number Frame Error Response HINT: If immobiliser key code verification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above
G41-8 (CODE) - G41-6 (AGND)	B - BE	Output	Signal output to certification ECU (smart key ECU assembly) (Radio waves from transponder key amplifier built into engine switch used to detect key information. Key information then sent to certification ECU (smart key ECU assembly))	Engine switch off, engine switch pressed with electrical key transmitter sub-assembly held near engine switch*	Pulse generation (See waveform 2)
G41-10 (VC5) - G41-6 (AGND)	BE - BE	Input	Transponder key amplifier power supply (Power supplied from certification ECU (smart key ECU assembly) when transponder key amplifier built into engine switch activated)	Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed	Pulse generation (See waveform 3)

Terminal No. (Symbol)

Wiring Color

Input / Output

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

G41-7 (TXCT) - G41-6 (AGND)

GR - BE

Input

Signal input from certification ECU (smart key ECU assembly)

(Code sent from certification ECU (smart key ECU assembly) to transponder key amplifier built into engine switch, and then transmitted by transponder key amplifier antenna as radio waves)

Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed

Pulse generation

(See waveform 1)

BCC Malfunction
Abnormal Status
Different Encrypt Code
Different Serial Number
Frame Error
Response
HINT:

If immobiliser key code verification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above

G41-8 (CODE) - G41-6 (AGND)

B - BE

Output

Signal output to certification ECU (smart key ECU assembly)

(Radio waves from transponder key amplifier built into engine switch used to detect key information. Key information then sent to certification ECU (smart key ECU assembly))

Engine switch off, engine switch pressed with electrical key transmitter sub-assembly held near engine switch*

Pulse generation

(See waveform 2)

G41-10 (VC5) - G41-6 (AGND)

BE - BE

Input

Transponder key amplifier power supply

(Power supplied from certification ECU (smart key ECU assembly) when transponder key amplifier built into engine switch activated)

Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed

Pulse generation

(See waveform 3)

HINT:

*: Remove the transmitter battery before performing this inspection.

NOTICE:

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

(1) Waveform 1 (Reference)

Measurement Condition

Item	Content
Tester Connection	G41-7 (TXCT) - G41-6 (AGND)
Tool Setting	2 V/DIV., 20 ms./DIV.
Condition	Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed

(2) Waveform 2 (Reference)

*a	Waveform
*b	Waveform (detail)

Measurement Condition

Item	Content
Tester Connection	G41-8 (CODE) - G41-6 (AGND)
Tool Setting	Waveform 1 V/DIV., 20 ms./DIV. Waveform (detail) 2 V/DIV., 100 μs./DIV.
Condition	Engine switch off, engine switch pressed with electrical key transmitter sub-assembly held near engine switch*

HINT:

*: Remove the transmitter battery before performing this inspection.

(3) Waveform 3 (Reference)

Measurement Condition

Item	Content
Tester Connection	G41-10 (VC5) - G41-6 (AGND)
Tool Setting	2 V/DIV., 200 ms./DIV.
Condition	Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed

Security Indicator Light Does not Blink. Steering Lock does not Lock. System Diagram

Lost Communication with ECM / PCM (U0100,U0140,U0142,U0155). Unable to Unlock Steering Wheel (Engine cannot Start)

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Brake System (other): Brake Booster(for Gasoline Model)
Components COMPONENTS ILLUSTRATION *1 NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY - - ILLUSTRATION *1 FRONT CENTER UPPER SUSPENSION BRACE SUB-ASSEMBLY - - Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping" : N*m (kgf*cm, ft.*lbf) N*m (kgf*cm, ...