THEFT DETERRENT / KEYLESS ENTRY SMART ENTRY AND START SYSTEM(for Start Function, HEV Model) B279046 ID-BOX Calibration / Parameter Memory Failure

DESCRIPTION

When an internal malfunction occurs in the ID code box (immobiliser code ECU), the certification ECU (smart key ECU assembly) stores this DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B279046	ID-BOX Calibration / Parameter Memory Failure	An internal malfunction occurs in the ID code box (immobiliser code ECU) (EEPROM access malfunction) (1 trip detection logic*).	· ID code box (immobiliser code ECU) · Certification ECU (smart key ECU assembly)	DTC output confirmation operation: An immobiliser set/unset operation is performed (the ignition switch is turned off or to ON while the electrical key transmitter sub-assembly is being carried).

*: 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
· Ignition switch on (READY): Hybrid control system cannot be started next time · Hybrid control system stopped: Hybrid control system cannot be started	-

Related Data List and Active Test
DTC No.	Data List and Active Test
B279046	-

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 Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). 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 entry and start 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 entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, HEV Model)>HOW TO PROCEED WITH TROUBLESHOOTING202307,999999,_58,_115230,_0606512,RM100000002C24Z,

·

Before replacing the ID code box (immobiliser code ECU), refer to Service Bulletin.

·

After performing repairs, confirm that no DTCs are output by performing "DTC Output Confirmation Operation."

1.REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

a.

Replace the ID code box (immobiliser code ECU) with a new one.

Result:

Proceed to
NEXT

2.CLEAR DTC

a.

Using the GTS, clear the DTCs.

Result:

Proceed to
NEXT

3.REGISTER RECOGNITION CODE

a.

Register the recognition codes to the ECUs.

Result:

Proceed to
NEXT

4.REGISTER ECU COMMUNICATION ID

a.

Register the ECU communication ID codes.

Result:

Proceed to
NEXT

5.CHECK DTC

a.

Using the GTS, check if DTC is output.

Result:

Result	Proceed to
B279046 is output	A
B279046 is not output	B

A

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

B

END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE)