Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026A3B
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function (except TMMMS Made)): Luggage Compartment Door Entry Unlock Function does not Operate when Key is Outside Luggage Compartment; 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]

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:

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

    Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function (except TMMMS Made)): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before replacing the certification ECU (smart key ECU assembly), refer to Precaution.

    Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function (except TMMMS Made)): PRECAUTION

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
  • Check that there are no electrical key transmitter sub-assemblies in the vehicle.

HINT:

  • If the entry luggage compartment open function 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

Vehicle Control History (RoB)

PROCEDURE

1.

READ VALUE USING GTS (TRUNK LID OPEN MODE FUNCTION)

(a) Read the Data List according to the display on the GTS.

Body Electrical > Smart Key > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Trunk Lid Open Mode Function

Entry luggage compartment open mode

OFF or ON

Customize setting displayed

-

Body Electrical > Smart Key > Data List

Tester Display

Trunk Lid Open Mode Function

Result

Proceed to

Trunk Lid Open Mode Function is ON

A

Trunk Lid Open Mode Function is OFF

B
B

PERFORM CUSTOMIZE SETTING (Proceed to Customize Parameters)

A

2.

CHECK LUGGAGE COMPARTMENT DOOR OPEN FUNCTION

(a) Operate the door control switch to unlock the doors, then operate the luggage electrical key switch and check that the luggage compartment door opens.

Result

Proceed to

The luggage compartment door opens

A

The luggage compartment door does not open

B
B

GO TO POWER DOOR LOCK CONTROL SYSTEM

A

3.

READ VALUE USING GTS (TRUNK LID/BACK DOOR UNLOCK SWITCH)

(a) Read the Data List according to the display on the GTS.

Body Electrical > Smart Key > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Trunk Lid/Back Door Unlock Switch

Luggage electrical key switch

OFF or ON

OFF: Luggage electrical key switch not pushed

ON: Luggage electrical key switch pushed
  • Displays whether the luggage electrical key switch is on or off.
  • Use this Data List item to help determine if there is a switch malfunction when the entry luggage compartment open function does not operate.

Body Electrical > Smart Key > Data List

Tester Display

Trunk Lid/Back Door Unlock Switch

OK:

The GTS 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.

*1

Electrical Key Transmitter Sub-assembly

*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.

*1

Electrical Key Transmitter Sub-assembly

*a

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

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

6.

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

(a) Disconnect the O174 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the O39 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

O174-4 (CLG8) - O39-2 (ANTE8)

Always

Below 1 Ω

O174-3 (CG8B) - O39-1 (CLGB)

Always

Below 1 Ω

O174-4 (CLG8) or O39-2 (ANTE8) - Other terminals and body ground

Always

10 kΩ or higher

O174-3 (CG8B) or O39-1 (CLGB) - Other terminals and body ground

Always

10 kΩ or higher

(d) Reconnect the O174 certification ECU (smart key ECU assembly) connector.

(e) Reconnect the O39 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

O174-4 (CLG8) - I167-29 (E)

Procedure:

  1. Ignition 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)

O174-3 (CG8B) - I167-29 (E)

Procedure:

  1. Ignition 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 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function (except TMMMS Made)): OPERATION CHECK

Result

Proceed to

Luggage compartment open function operates normally

A

Luggage compartment open function does not operate normally

B
A

END (CONNECTOR WAS NOT CONNECTED SECURELY)
B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

9.

INSPECT LUGGAGE ELECTRICAL KEY SWITCH

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; 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 O174 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the O116 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

O174-16 (TSW5) - O116-3 (UL)

Always

Below 1 Ω

O116-1 (E) - Body ground

Always

Below 1 Ω

O174-16 (TSW5) or O116-3 (UL) - 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 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function (except TMMMS Made)): OPERATION CHECK

Result

Proceed to

Luggage compartment open function operates normally

A

Luggage compartment open function does not operate normally

B
A

END (CONNECTOR WAS NOT CONNECTED SECURELY)
B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)