Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000028K9W |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [11/2022 -
] |
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): B278196; Steering Lock System Component Internal Failure; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 - ] |
DTC
|
B278196
|
Steering Lock System Component Internal Failure
|
DESCRIPTION
except Manual Transaxle
-
As this DTC is not normally output, it may be due to noise in the LIN communication system, etc.
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
Note
|
B278196
|
Steering Lock System Component Internal Failure
|
Noise in the LIN communication system, etc.
|
ID code box (immobiliser code ECU)
|
No confirmation operation is necessary (monitoring is continuous).
|
Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected
|
Fail-safe Function when Malfunction Detected
|
The engine cannot be started.
|
-
|
Related Data List and Active Test Items
DTC No.
|
Data List and Active Test
|
B278196
|
-
|
for Manual Transaxle
-
The steering lock ECU and steering lock motor are built into the steering lock actuator or upper bracket assembly.
The steering lock ECU (steering lock actuator or upper bracket assembly) detects whether the steering lock is in the lock or unlock position by using the lock sensor and unlock sensor of the steering lock motor.
The steering lock ECU (steering lock actuator or upper bracket assembly) receives lock and unlock request signals from the certification ECU (smart key ECU assembly) and responds with lock and unlock operation signals.
HINT:
The steering lock ECU (steering lock actuator or upper bracket assembly) is not connected to the CAN communication system. However, the steering lock ECU (steering lock actuator or upper bracket assembly) is connected to the certification ECU (smart key ECU assembly) via LIN communication and communicates with other components via CAN communication through the certification ECU (smart key ECU assembly).
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
Note
|
B278196
|
Steering Lock System Component Internal Failure
|
One of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the ignition switch is ON.)):
-
The steering lock sensor or unlock sensor is malfunctioning (When both detection switches turn on, the system is determined to be malfunctioning).
-
The steering lock motor activation circuit has a short circuit.
-
The steering lock motor activation circuit has an open circuit.
|
-
Steering lock ECU (steering lock actuator or upper bracket assembly)
-
LIN communication system
|
DTC Output Confirmation Operation:
-
No confirmation operation is necessary (monitoring is continuous).
|
Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected
|
Fail-safe Function when Malfunction Detected
|
The steering cannot be locked or unlocked. For this reason, the engine cannot be started.
|
Prohibits the engine from being started (the engine does not start).
|
Related Data List and Active Test Items
DTC No.
|
Data List and Active Test
|
B278196
|
Smart Key
-
Sensor Malfunction History
-
Motor Driver Short History
-
Lock Bar Stuck Error History
|
CAUTION / NOTICE / HINT
HINT:
When all the ECUs that are connected via LIN communication cannot communicate with the certification ECU (smart key ECU assembly), DTC B278588 is stored.
PROCEDURE
(a) Check the vehicle specification.
Result
|
Proceed to
|
for Manual Transaxle
|
A
|
except Manual Transaxle
|
B
|
A
|
|
|
(a) Using the GTS, check if LIN communication DTC B278588 is output.
Body Electrical > Smart Key > Trouble Codes
HINT:
If a LIN communication DTC is output, perform troubleshooting for the LIN communication system.
Click here
Result
|
Proceed to
|
B278588 is output
|
A
|
B278588 is not output
|
B
|
(a) Clear the DTCs.
Body Electrical > Smart Key > Clear DTCs
NEXT
|
|
|
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes
Result
|
Proceed to
|
B278196 is output
|
A
|
B278196 is not output
|
B
|
B |
|
END
|
|