Toyota Corolla Cross: Steering Lock System Missing Message (B278187,B278196,B278211,B278215,B279F1C)

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System (for Start Function, Gasoline Model) / Steering Lock System Missing Message (B278187,B278196,B278211,B278215,B279F1C)

DESCRIPTION

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
B278187	Steering Lock System Missing Message	One of the following conditions is met (1-trip detection logic (Only output while a malfunction ispresent and the engine switch is on (IG).)): Noise in the LIN communication system, etc.	ID code box (immobiliser code ECU)	DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).
B278196	Steering Lock System Component Internal Failure	One of the following conditions is met (1-trip detection logic (Only output while a malfunction ispresent and the engine switch is on (IG).)): Noise in the LIN communication system, etc.	ID code box (immobiliser code ECU)	DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).
B278211	Power Source Control System Circuit Short to Ground	One of the following conditions is met (1-trip detection logic (Only output while a malfunction ispresent and the engine switch is on (IG).)): Noise in the LIN communication system, etc.	ID code box (immobiliser code ECU)	DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).
B278215	Power Source Control System Circuit Short to Battery or Open	One of the following conditions is met (1-trip detection logic (Only output while a malfunction ispresent and the engine switch is on (IG).)): Noise in the LIN communication system, etc.	ID code box (immobiliser code ECU)	DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).
B279F1C	Steering Lock Confirmation Signal Circuit Voltage Out of Range	One of the following conditions is met (1-trip detection logic (Only output while a malfunction ispresent and the engine switch is on (IG).)): Noise in the LIN communication system, etc.	ID code box (immobiliser code ECU)	DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).

*: Only detected while a malfunction is present and the ignition switch is ON.

Vehicle Condition and Fail-safe Function when Malfunction Detected

DTC Code	Vehicle Condition when Malfunction Detected	Fail-safe Function when Malfunction Detected
B278187	The engine cannot be started.	Prohibits the engine from being started (the engine does not crank).
B278196
B278211
B278215
B279F1C

Related Data List and Active Test Items

DTC No.	Data List and Active Test
B278187 B278196 B278211 B278215 B279F1C	-

DTC No.

Data List and Active Test

B278187

B278196

B278211

B278215

B279F1C

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 the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. 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 Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.
Click here
After performing repairs, confirm that no DTCs are output again.

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

CHECK DTC

(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
DTC B278588 is output	A
DTC B278588 is not output	B

GO TO LIN COMMUNICATION SYSTEM (DTC B278588)

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Smart Key > Clear DTCs

3.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Smart Key > Trouble Codes

Result	Proceed to
DTC is output	A
DTC is not output	B

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

END

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Toyota Corolla Cross: Steering Lock System Missing Message (B278187,B278196,B278211,B278215,B279F1C)

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