Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001BHXT
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, HV Model): Luggage Compartment Door Entry Unlock Function does not Operate when Key is Outside Luggage Compartment; 2019 - 2022 MY Avalon HV [04/2018 -        ]

Luggage Compartment Door Entry Unlock Function does not Operate when Key is Outside Luggage Compartment

DESCRIPTION

If the entry luggage compartment door open function does not operate, there may be a malfunction in the luggage electrical key switch circuit or certification ECU (smart key ECU assembly), which receives a signal from the luggage electrical key switch circuit, or a communication error between the vehicle (electrical key antenna (outside luggage compartment)) and electrical key transmitter sub-assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • The smart key system (for Entry Function, HV Model) uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Entry 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 Entry Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • 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.
  • Check that there are no electrical key transmitter sub-assemblies in the vehicle.
  • Before replacing the certification ECU (smart key ECU assembly), refer to smart key system (for Entry Function, HV Model) Precaution.

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

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

HINT:

  • If the entry luggage compartment open functions does not operate, the cause of the malfunction may be stored in the certification ECU (smart key ECU assembly).
  • If the cause of the malfunction is stored in the certification ECU (smart key ECU assembly), the following table is helpful in checking whether the malfunction was caused by wave interference.

Body Electrical > Smart Key > Utility

Tester Display

Operation History

PROCEDURE

1.

READ VALUE USING TECHSTREAM (LUGGAGE COMPARTMENT DOOR OPEN MODE)

(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 / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Smart Key > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Trunk Open Mode

Entry luggage compartment open mode

OFF or ON

Customize setting displayed

-

Body Electrical > Smart Key > Data List

Tester Display

Trunk Open Mode

Result

Proceed to

Trunk Open Mode is ON

A

Trunk Open Mode is OFF

B
B

PERFORM CUSTOMIZE SETTING (Proceed to Customize Parameters)

A

2.

CHECK LUGGAGE COMPARTMENT DOOR OPENER SYSTEM

(a) Operate the luggage compartment door opening switch assembly in the vehicle and check that the luggage compartment door opens.

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; DOOR / HATCH: LUGGAGE COMPARTMENT DOOR OPENER SYSTEM (for HV Model): OPERATION CHECK

Result

Proceed to

The luggage compartment door opens

A

The luggage compartment door does not open

B
B

GO TO LUGGAGE COMPARTMENT DOOR OPENER SYSTEM

A

3.

READ VALUE USING TECHSTREAM (TR/B-DOOR UNLOCK SW)

(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 / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Smart Key > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Tr/B-Door Unlock SW

Luggage electrical key switch

OFF or ON

OFF: Luggage electrical key switch not pushed

ON: Luggage electrical key switch pushed

-

Body Electrical > Smart Key > Data List

Tester Display

Tr/B-Door Unlock SW

OK:

The Techstream display changes correctly in response to the operation of the luggage electrical key switch.

NG

GO TO STEP 9

OK

4.

CHECK WAVE ENVIRONMENT

(a) Bring the electrical key transmitter sub-assembly approximately 0.3 m (0.984 ft.) from the electrical key antenna (outside luggage compartment) and perform an entry luggage compartment open function check.

HINT:

  • Communication may not be possible if the electrical key transmitter sub-assembly is brought within 0.2 m (0.656 ft.) of the rear bumper.
  • When the electrical key transmitter sub-assembly is brought near the electrical key antenna (outside luggage compartment), the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
  • If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.
  • There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.
  • If a tool for checking radio waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

OK:

Entry functions operate normally.

*a

Approximately 0.3 m (0.984 ft.)
OK

AFFECTED BY WAVE INTERFERENCE
NG

5.

CHECK KEY DIAGNOSTIC MODE

(a) Check the following antenna in key diagnostic mode.

Body Electrical > Smart Key > Utility

Tester Display

Communication Check(Key Diag Mode)

(b) When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the electrical key antenna (outside luggage compartment), check that the wireless buzzer sounds.

HINT:

  • Select either channel 1 or channel 2 and inspect key diagnostic mode for each channel.
  • If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.

OK:

Wireless buzzer sounds.

*a

0.7 to 1.0 m (2.30 to 3.28 ft.)
OK

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

NG

6.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT))

(a) Disconnect the K10 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the P2 electrical key antenna (outside luggage compartment) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K10-13 (CLG8) - P2-2 (ANTE8)

Always

Below 1 Ω

K10-12 (CG8B) - P2-1 (CLGB)

Always

Below 1 Ω

K10-13 (CLG8) or P2-2 (ANTE8) - Other terminals and body ground

Always

10 kΩ or higher

K10-12 (CG8B) or P2-1 (CLGB) - Other terminals and body ground

Always

10 kΩ or higher

(d) Reconnect the K10 certification ECU (smart key ECU assembly) connector.

(e) Reconnect the P2 electrical key antenna (outside luggage compartment) connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT))

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

*b

Waveform 1

(a) Using an oscilloscope, check the waveform.

OK:

Tester Connection

Condition

Tool Setting

Specified Condition

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

Procedure:

  1. Power switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors closed
  4. Luggage electrical key switch off → on

2 V/DIV., 500 ms/DIV.

Pulse generation

(See waveform 1)

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

Procedure:

  1. Power switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors closed
  4. Luggage electrical key switch off → on

2 V/DIV., 500 ms/DIV.

Pulse generation

(See waveform 1)
NG

REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT)

OK

8.

CHECK ENTRY LUGGAGE COMPARTMENT OPEN OPERATION

(a) Connect all connectors and check that the entry luggage compartment open function operates.

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, HV Model): OPERATION CHECK

Result

Proceed to

Luggage open function operates normally

A

Luggage open function does not operate normally

B
A

END (CONNECTOR WAS NOT CONNECTED SECURELY)
B

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

9.

INSPECT LUGGAGE ELECTRICAL KEY SWITCH

(a) Remove the luggage electrical key switch.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; DOOR / HATCH: LUGGAGE COMPARTMENT DOOR OPENER OUTER SWITCH: REMOVAL

(b) Inspect the luggage electrical key switch.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; DOOR / HATCH: LUGGAGE COMPARTMENT DOOR OPENER OUTER SWITCH: INSPECTION

NG

REPLACE LUGGAGE ELECTRICAL KEY SWITCH

OK

10.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - LUGGAGE ELECTRICAL KEY SWITCH)

(a) Disconnect the K10 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the P1 luggage electrical key switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K10-26 (TSW5) - P1-2

Always

Below 1 Ω

P1-1 - Body ground

Always

Below 1 Ω

K10-26 (TSW5) or P1-2 - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

11.

CHECK ENTRY LUGGAGE COMPARTMENT OPEN OPERATION

(a) Connect all connectors and check that the entry luggage compartment open function operates.

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, HV Model): OPERATION CHECK

Result

Proceed to

Luggage open function operates normally

A

Luggage open function does not operate normally

B
A

END (CONNECTOR WAS NOT CONNECTED SECURELY)
B

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