| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001GU3J |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, HV Model): Touching Unlock Sensor for Certain Period of Time does not Unlock All Doors; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
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Touching Unlock Sensor for Certain Period of Time does not Unlock All Doors |
DESCRIPTION
If the entry unlock function of the driver door cannot be operated by touching and holding the unlock sensor of the driver door, but can be operated through other methods, it can be determined that the request code is being transmitted properly from the driver door. In this case, the certification ECU (smart key ECU assembly) may be malfunctioning.
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.
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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.
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![2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
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Before replacing the certification ECU (smart key ECU assembly), refer to Precaution.
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- 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:
Touching the unlock sensor for a certain period of time to unlock all of the doors can only be performed if the customize setting "Door Unlock Mode2" is set to "Driver".
PROCEDURE
|
1. |
CHECK CUSTOMIZE SETTING (DOOR UNLOCK MODE2) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Customize Setting / Smart Key / Access.
Smart Key / Access
|
Tester Display |
Description |
Default |
Setting |
ECU |
|---|---|---|---|---|
|
Door Unlock Mode2 |
Function that sets which doors are unlocked by the entry unlock function. |
Driver |
0:All,1:Driver |
Certification ECU (Smart key ECU assembly) |
HINT:
Touching the unlock sensor for a certain period of time to unlock all of the doors can only be performed if the customize setting "Door Unlock Mode2" is set to "Driver".
|
Result |
Proceed to |
|---|---|
|
The customize setting is set to Driver |
A |
|
The customize setting is set to All |
B |
| B |
|
|
|
2. |
CHECK CUSTOMIZE SETTING (DOOR UNLOCK SENSOR TOUCH TIME ADJUST) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Customize Setting / Smart Key / Access.
Smart Key / Access
|
Tester Display |
Description |
Default |
Setting |
ECU |
|---|---|---|---|---|
|
Door Unlock Sensor Touch Time Adjust |
Function that sets the length of time the unlock sensor on the door outside handle assembly (for driver door) must be touched to unlock all of the doors. |
Middle |
00:OFF,01:Short,10:Middle,11:Long |
Certification ECU (Smart key ECU assembly) |
|
Result |
Proceed to |
|---|---|
|
The customize setting is set to Short, Middle or Long |
A |
|
The customize setting is set to OFF |
B |
| B |
|
|
|
3. |
READ VALUE USING TECHSTREAM (D-DOOR TOUCH SENSOR) |
|
(a) Turn the power switch off. |
|
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Turn the Techstream on.
(e) Open and close the driver door.
(f) With the electrical key transmitter sub-assembly outside of the vehicle, press the lock switch of the electrical key transmitter sub-assembly to lock all of the doors.
(g) Hold the electrical key transmitter sub-assembly at the same height as the door outside handle assembly and approximately 0.3 m (0.984 ft.) from the driver door.
(h) Check that the LED of the electrical key transmitter sub-assembly blinks.
(i) Read the Data List according to the display on the Techstream.
(j) Touch the unlock sensor on the backside of the front door outside handle assembly (for driver door) for 2 seconds or more.*
- *: Perform this step 3 seconds or more after performing step (f).
HINT:
When checking the operation of the unlock sensor again, make sure to perform the procedure from step (a).
Body Electrical > Smart Key > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
D-Door Touch Sensor |
Driver door touch sensor (unlock sensor) |
OFF or ON |
OFF: Driver door touch sensor (unlock sensor) not touched ON: Driver door touch sensor (unlock sensor) touched |
|
Body Electrical > Smart Key > Data List
|
Tester Display |
|---|
|
D-Door Touch Sensor |
OK:
The Techstream display changes correctly in response to the operation of the front door outside handle assembly (for driver door).
| OK |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
| NG |
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REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR)
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