Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001B2OS
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Security Indicator Light Does not Blink; 2019 - 2022 MY Avalon HV [04/2018 -        ]

Security Indicator Light Does not Blink

DESCRIPTION

  • The certification ECU (smart key ECU assembly) blinks the security indicator light (radio and display receiver assembly) when the immobiliser is set (power switch off).
  • The certification ECU (smart key ECU assembly) receives the security indicator light signal from the main body ECU (multiplex network body ECU) via CAN communication when the theft deterrent system is in the arming preparation state or alarm sounding state. Then, the certification ECU (smart key ECU assembly) blinks the security indicator light (radio and display receiver assembly).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When using the Techstream with the power switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
  • The smart key system (for Start Function, HV Model) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function, HV Model) after confirming that the communication systems are functioning properly.

    Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before replacing the certification ECU (smart key ECU assembly) or main body ECU (multiplex network body ECU), refer to Registration.

    Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION 2021 - 2022 MY Avalon HV [08/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

PROCEDURE

1.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Smart Key > Trouble Codes

Powertrain > Hybrid Control > Trouble Codes

OK:

DTCs are not output.

NG

GO TO DIAGNOSTIC TROUBLE CODE CHART 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): DIAGNOSTIC TROUBLE CODE CHART 2021 MY Avalon HV [08/2020 - 08/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): DIAGNOSTIC TROUBLE CODE CHART 2022 MY Avalon HV [08/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): DIAGNOSTIC TROUBLE CODE CHART

OK

2.

PERFORM ACTIVE TEST USING TECHSTREAM (IMMOBILISER INDICATOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Smart Key / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Smart Key > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Immobiliser Indicator

Security indicator light

OFF/ON

-

Body Electrical > Smart Key > Active Test

Tester Display

Immobiliser Indicator

OK:

The security indicator light (radio and display receiver assembly) operates normally.

NG

GO TO STEP 4

OK

3.

CHECK SECURITY INDICATOR LIGHT (RADIO AND DISPLAY RECEIVER ASSEMBLY) OPERATION

(a) When the immobiliser is set, check that the security indicator light (radio and display receiver assembly) blinks.*1

OK:

The security indicator light (radio and display receiver assembly) blinks normally.

(b) When the theft deterrent system is in the arming preparation state, check that the security indicator light (radio and display receiver assembly) illuminates.*2

OK:

The security indicator light (radio and display receiver assembly) illuminates normally.

Result

Proceed to

*1 is NG (*2 is OK)

A

*2 is NG (*1 is OK)

B

A

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

B

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

4.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - SECURITY INDICATOR LIGHT (RADIO AND DISPLAY RECEIVER ASSEMBLY) AND BODY GROUND)

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

(b) Disconnect the G20 security indicator light (radio and display receiver assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G40-20 (IND) - G20-16 (LP)

Always

Below 1 Ω

G40-20 (IND) or G20-16 (LP) - Other terminals and body ground

Always

10 kΩ or higher

G20-6 (GND) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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

(b) Connect the G20 security indicator light (radio and display receiver assembly) connector.

(c) Using an oscilloscope, check the waveform.

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

-

-

Measurement Condition:

Tester Connection

Condition

Specified Condition

G40-20 (IND) - Body ground

Power switch off → on (IG)

Pulse generation → Below 2 V

OK

REPLACE SECURITY INDICATOR LIGHT (RADIO AND DISPLAY RECEIVER ASSEMBLY)

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL