- Engine switch off
- All doors closed
- Electrical key transmitter sub-assembly not inside vehicle
-
All doors locked through wireless operation
(electrical key transmitter sub-assembly brought inside detection area*)
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001CDKK |
| Model Year Start: 2019 | Model: GR Corolla | Prod Date Range: [06/2018 - 09/2022] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): B27A2; Open in Front Passenger Side Electrical Antenna Circuit; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022] | ||
|
DTC |
B27A2 |
Open in Front Passenger Side Electrical Antenna Circuit |
DESCRIPTION
The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the front door outside handle assembly (for front passenger door) (electrical key antenna) at intervals of 0.25 seconds. For the front door outside handle assembly (for front passenger door) (electrical key antenna) to detect when the electrical key transmitter sub-assembly is brought close to the vehicle, a signal requesting a response from the electrical key transmitter sub-assembly is transmitted within approximately 1 m (3.28 ft.) of the front passenger door at intervals of 0.25 seconds. DTC B27A2 is stored by the certification ECU (smart key ECU assembly) when an open is detected between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for front passenger door) (electrical key antenna) (between terminals CLG2 and ANT1, or terminals CG2B and ANT2).
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Note |
|---|---|---|---|---|
|
B27A2 |
Open in Front Passenger Side Electrical Antenna Circuit |
An open is detected in the circuit between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for front passenger door) (CLG2 - ANT1, CG2B - ANT2) (This is detected by the malfunction detection circuit in the certification ECU (smart key ECU assembly)) (1 trip detection logic*). |
|
DTC Output Confirmation Operation:
|
- *: Only output while a malfunction is present.
Vehicle Condition and Fail-safe Operation when Malfunction Detected
|
Vehicle Condition when Malfunction Detected |
Fail-safe Operation when Malfunction Detected |
|---|---|
|
Entry lock/unlock operation cannot be performed for front passenger door |
- |
Related Data List and Active Test
|
DTC No. |
Data List and Active Test |
|---|---|
|
B27A2 |
Key diagnostic mode can be used to perform troubleshooting |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the engine 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 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
![2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
-
Before replacing the certification ECU (smart key ECU assembly), refer to Precaution.
Click here
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
|
1. |
CHECK CONNECTOR CONNECTION |
(a) Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and front door outside handle assembly (for front passenger door).
OK:
Connectors are properly connected.
| NG |
|
CONNECT CONNECTORS PROPERLY |
|
|
2. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR FRONT PASSENGER DOOR)) |
(a) Disconnect the O61 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the K3 front door outside handle assembly (for front passenger door) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O61-4 (CLG2) - K3-6 (ANT1) |
Always |
Below 1 Ω |
|
O61-3 (CG2B) - K3-4 (ANT2) |
Always |
Below 1 Ω |
(d) Reconnect the O61 certification ECU (smart key ECU assembly) connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR FRONT PASSENGER DOOR)) |
|
*a |
Component with harness connected (Certification ECU (Smart Key ECU Assembly)) |
*b |
Waveform 1 |
|
*c |
Waveform 2 |
*d |
Waveform 3 |
|
*e |
Waveform 4 |
- |
- |
(a) Using an oscilloscope, check the waveform.
OK:
|
Tester Connection |
Condition |
Tool Setting |
Specified Condition |
|---|---|---|---|
|
O61-4 (CLG2) - I1-18 (E) |
Procedure: |
5 V/DIV., 500 ms/DIV. |
Pulse generation (See waveform 1) |
|
Procedure:
|
5 V/DIV., 100 ms/DIV. |
Pulse generation (See waveform 2) |
|
|
O61-3 (CG2B) - I1-18 (E) |
Procedure:
|
5 V/DIV., 500 ms/DIV. |
Pulse generation (See waveform 3) |
|
Procedure:
|
5 V/DIV., 100 ms/DIV. |
Pulse generation (See waveform 4) |
-
*: For details about the entry function detection area, refer to Operation Check.
Click here
| OK |
|
REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR FRONT PASSENGER DOOR)
|
| NG |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
|
|