THEFT DETERRENT / KEYLESS ENTRY IMMOBILISER SYSTEM(w/ Smart Entry and Start System) B2790 ID BOX EEPROM Malfunction | Toyota Corolla/Altis NZE17/ZRE17 2017 Service Manual

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
B2790	ID BOX EEPROM Malfunction	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 engine switch is turned off or on (IG) 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
· Engine running: Engine cannot be started next time · Engine stopped: Engine cannot be started	-

Related Data List and Active Test
DTC No.	Data List and Active Test
B2790	-

NOTICE:: ·

When using the GTS with the engine 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.

·

Before replacing the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU), refer to Service Bulletin.

·

After repair, 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.

Clear the DTCs.

Result:

Proceed to
NEXT

3.REGISTER RECOGNITION CODES

a.

Register the recognition codes in the ECUs.

Result:

Proceed to
NEXT

4.REGISTER ECU COMMUNICATION ID

a.

Register the ECU communication ID.

Result:

Proceed to
NEXT

5.CHECK FOR DTC

a.

Perform "DTC Output Confirmation Operation" procedure.

b.

Check for DTCs.

Result:

Proceed to
OK
NG

OK

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

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)