Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: 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).

(c) Connect the A10, K10 and G40 certification ECU (smart key ECU assembly) connectors.

(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

-

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:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. 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:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. 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:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. 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:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. 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:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly inside vehicle
  3. 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.

(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:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. 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

*a

Approximately 160 ms.

*b

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

*a

Approximately 160 ms.

*b

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

-

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

-

(c) Connect the G43 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

(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

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

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)

*a

Approximately 160 ms.

*b

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)

*a

Approximately 160 ms.

*b

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)

HINT:

*: Remove the transmitter battery before performing this inspection.

(c) 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)

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
    System Diagram

    Lost Communication with ECM / PCM (U0100,U0140,U0142,U0155)

    See More:

    Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Smart Key System(for Start Function, Gasoline Model): Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected ...

    Toyota Avalon (XX50) 2019-2022 Owners Manual

    Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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