DTC B1026:49 [BODY CONTROL MODULE (BCM)]

• If this DTC is detected, the system will enter the fail-safe function to ensure safety. If the ignition is switched OFF (LOCK) after a specified time has elapsed or the vehicle has been driven for a specified period of time or more while in the fail-safe mode, the ignition will remain switched off and the engine cannot be started. Therefore, perform the malfunction diagnosis while the engine can be started. In addition, after having performed the malfunction diagnosis, verify that this DTC is not detected with the steering wheel locked. If the DTC is not detected, the system returns to normal from the fail-safe function.

System malfunction location	Steering lock unit malfunction
Detection condition	• The body control module (BCM) detects a serious malfunction in the steering lock unit.
Fail-safe	• The system will enter the fail-safe function to ensure safety. If the ignition is switched OFF (LOCK) after a specified time has elapsed or the vehicle has been driven for a specified period of time or more while in the fail-safe mode, the ignition will remain switched off and the engine cannot be started.
Possible cause	• Body control module (BCM) malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable

System malfunction location

Steering lock unit malfunction

Detection condition

• The body control module (BCM) detects a serious malfunction in the steering lock unit.

Fail-safe

• The system will enter the fail-safe function to ensure safety. If the ignition is switched OFF (LOCK) after a specified time has elapsed or the vehicle has been driven for a specified period of time or more while in the fail-safe mode, the ignition will remain switched off and the engine cannot be started.

Possible cause

• Body control module (BCM) malfunction

System wiring diagram

Not applicable

Connector diagram

Not applicable

Step	Inspection	Results	Action
1	INSPECT BODY CONTROL MODULE (BCM) FOR MALFUNCTION • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) • Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, replace the body control module (BCM) and perform the repair completion verification. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
No	Go to repair completion verification 2.
Repair completion verification	VERIFY IF OTHER DTC IS DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
No	DTC troubleshooting completed.

Step

Inspection

Results

Action

INSPECT BODY CONTROL MODULE (BCM) FOR MALFUNCTION

• Clear the DTC recorded in the memory.

(See CLEARING DTC.)

• Perform the DTC inspection for the body control module (BCM).

(See DTC INSPECTION.)

• Is the same Pending DTC present?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.