Toyota Tacoma (2015-2018) Service Manual: Theft Deterrent System Presence Detection (B279C,B279C95)

Toyota Tacoma (2015-2018) Service Manual / Engine Immobiliser / Engine Immobiliser System(w/o Smart Key System) / Theft Deterrent System Presence Detection (B279C,B279C95)

DESCRIPTION

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

DTC No.	DTC Detection Condition	Trouble Area	DTC Output Confirmation Operation
B279C*1	An ECM that is incompatible with engine immobiliser system is installed.	ECM	Check for DTCs.
B279C95*2	An ECM that is incompatible with engine immobiliser system is installed.	ECM	Check for DTCs.

*1: for 2TR-FE
*2: for 2GR-FKS

Vehicle Condition and Fail-safe Operation when Malfunction Detected

Vehicle Condition when Malfunction Detected	Fail-safe Operation when Malfunction Detected
Engine cannot be started	-

Related Data List and Active Test

DTC No.	Data List and Active Test
B279C*1	-
B279C95*2	-

*1: for 2TR-FE
*2: for 2GR-FKS

CAUTION / NOTICE / HINT

NOTICE:

If the ECM is replaced, refer to Registration (See page ).
After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

CLEAR DTC

(a) Clear the DTCs (See page ).

2.	CHECK FOR DTC

(a) Perform "DTC Output Confirmation Operation" procedure.

(b) Check for DTCs (See page OK: ).

OK:

DTC B279C*1 or B279C95*2 is not output.

*1: for 2TR-FE
*2: for 2GR-FKS

Result

Result	Proceed to
OK	A
NG (for 2TR-FE)	B
NG (for 2GR-FKS)	C

USE SIMULATION METHOD TO CHECK

REPLACE ECM

Theft Deterrent System Communication Line High Fixation (B279A,B279A12)

DESCRIPTION If the communication line (EFIO-IMI) to the transponder key ECU assembly is stuck high (e.g. shorted to +B), the ECM stores this DTC. DTC No. DTC Detection Condit ...

Engine Immobiliser System Malfunction (B2799,B279986)

DESCRIPTION This DTC is stored when one of the following occurs: 1) the ECM detects errors in its own communication with the transponder key ECU assembly; 2) the ECM detects errors in the communi ...

Other materials:

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE KNUCKLE GREASE RETAINER CAP (for 2WD) (a) Using a screwdriver and hammer, remove the knuckle grease retainer cap. 2. REMOVE FRONT AXLE HUB OIL SEAL (for 4WD) (a) Using a screwdriver and hammer, remove the front axle hub oil seal. 3. REMOVE FRONT WHEEL ADJUST ...

Freeze Frame Data
FREEZE FRAME DATA 1. FREEZE FRAME DATA (a) When a DTC is stored, the 4 wheel drive control ECU stores the current vehicle state as Freeze Frame Data. HINT: Freeze Frame Data at the time a DTC is stored: When the 4 wheel drive control ECU stores data at the time a DTC is stored, no updates w ...

Inspection
INSPECTION PROCEDURE 1. INSPECT MAGNET CLUTCH ASSEMBLY (a) Inspect the magnet clutch assembly. Text in Illustration *a Component without harness connected (Magnet Clutch Assembly) ...