B279C

DTC Code	DTC Name
B279C	Theft Deterrent System Presence Detection

DESCRIPTION

If an ECM that is incompatible with the immobiliser system is installed, the ECM stores this DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B279C	Theft Deterrent System Presence Detection	An ECM that is incompatible with the immobiliser system is installed. (1-trip detection logic*)	ECM	-

Table 1. Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected	Fail-safe Function when Malfunction Detected
Engine cannot be started	-

Table 2. Related Data List and Active Test
DTC No.	Data List and Active Test
B279C	-

CAUTION / NOTICE / HINT

Note:

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 ECM refer to Service Bulletin.
After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

REPLACE ECM

Temporarily replace the ECM with a new one.

Result

Proceed to
NEXT

Tip:

Refer to Service Bulletin.

Result

Proceed to
NEXT

CLEAR DTC

Clear the DTCs.

Result

Proceed to
NEXT

CHECK FOR DTC

Check for DTCs.

OK
B279C is not output.

Result

Result	Proceed to
DTC B279C is not output	A
DTC B279C is output	B

IMMOBILISER SYSTEM, Diagnostic DTC:B279C