Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000028K8R |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [11/2022 -
] |
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function): B27A113; Driver Side Electrical Antenna Circuit Open; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] |
DTC
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B27A113
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Driver Side Electrical Antenna Circuit Open
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DESCRIPTION
The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the front door outside handle assembly (for driver door) (electrical key antenna) at intervals of 0.25 seconds. For the front door outside handle assembly (for driver 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 driver door at intervals of 0.25 seconds. DTC B27A113 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 driver door) (electrical key antenna) (between terminals CLG1 and ANT1, or terminals CG1B and ANT2).
DTC No.
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Detection Item
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DTC Detection Condition
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Trouble Area
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Note
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B27A113
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Driver Side Electrical Antenna Circuit Open
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An open is detected in the circuit between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door) (CLG1 - ANT1, CG1B - ANT2) (This is detected by the malfunction detection circuit in the certification ECU (smart key ECU assembly)) (1 trip detection logic*).
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-
Certification ECU (smart key ECU assembly)
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Front door outside handle assembly (for driver door)
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Harness or connector
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DTC Output Confirmation Operation:
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-
*: Only output while a malfunction is present.
Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected
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Fail-safe Operation when Malfunction Detected
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Entry lock/unlock operation cannot be performed for driver door
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-
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Related Data List and Active Test
DTC No.
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Data List and Active Test
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B27A113
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Key diagnostic mode can be used to perform troubleshooting
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
PROCEDURE
1.
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CHECK CONNECTOR CONNECTION
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(a) Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door).
OK:
Connectors are properly connected.
NG |
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CONNECT CONNECTORS PROPERLY
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OK
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|
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2.
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CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR))
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(a) Disconnect the I167 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the L16 front door outside handle assembly (for driver door) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
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Condition
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Specified Condition
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I167-16 (CLG1) - L16-4 (ANT1)
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Always
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Below 1 Ω
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I167-15 (CG1B) - L16-6 (ANT2)
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Always
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Below 1 Ω
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(d) Reconnect the I167 certification ECU (smart key ECU assembly) connector.
NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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OK
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|
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3.
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CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR))
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*a
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Component with harness connected
(Certification ECU (Smart Key ECU Assembly))
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*b
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Waveform 1
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*c
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Waveform 2
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*d
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Waveform 3
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*e
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Waveform 4
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-
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-
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(a) Using an oscilloscope, check the waveform.
OK:
Tester Connection
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Condition
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Tool Setting
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Specified Condition
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I167-16 (CLG1) - I167-29 (E)
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Procedure:
-
Ignition switch off
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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*)
|
5 V/DIV., 500 ms./DIV.
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Pulse generation
(See waveform 1)
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Procedure:
-
Ignition 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 outside detection area*)
|
5 V/DIV., 500 ms./DIV.
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Pulse generation
(See waveform 2)
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I167-15 (CG1B) - I167-29 (E)
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Procedure:
-
Ignition switch off
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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*)
|
5 V/DIV., 500 ms./DIV.
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Pulse generation
(See waveform 3)
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Procedure:
-
Ignition 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 outside detection area*)
|
5 V/DIV., 500 ms./DIV.
|
Pulse generation
(See waveform 4)
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-
*: For details about the entry function detection area, refer to Operation Check.
Click here
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