Toyota CH-R Service Manual: Theft Deterrent System Presence Detection (B279C)

Toyota CH-R Service Manual / Theft Deterrent / Keyless Entry / Immobiliser System(w/ Smart Key System) / Theft Deterrent System Presence Detection (B279C)

DESCRIPTION

If an ECM that is incompatible with the immobiliser system is installed, the ECM will store 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	-

*: Only detected while a malfunction is present.

Vehicle Condition and Fail-safe Function when Malfunction Detected

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

Related Data List and Active Test

DTC No.	Data List and Active Test
B279C	-

CAUTION / NOTICE / HINT

NOTICE:

When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
Before replacing the ECM, refer to Registration.
Click here
After performing repairs, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Click here

Powertrain > Engine and ECT > Clear DTCs

2.	CHECK FOR DTC

(a) Check for DTCs.

Click here

Powertrain > Engine and ECT > Trouble Codes

OK:

B279C is not output.

USE SIMULATION METHOD TO CHECK

3.	REPLACE CURRENT ECM WITH PROPER ECM

(a) Replace the current ECM with a proper ECM.

Click here

END

Theft Deterrent System Communication Line High Fixation (B279A)

DESCRIPTION If the communication line (IMI - EFIO) between the ECM and ID code box (immobiliser code ECU) is stuck high, the ECM will store this DTC. DTC No. Detection Item ...

Engine Immobiliser System Malfunction (B2799)

DESCRIPTION If there is a communication malfunction between the ECM and ID code box (immobiliser code ECU), or when the communication ID codes do not match, the ECM stores this DTC. D ...

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Toyota CH-R Service Manual: Theft Deterrent System Presence Detection (B279C)

Theft Deterrent System Communication Line High Fixation (B279A)

Engine Immobiliser System Malfunction (B2799)

Other materials:

Toyota CH-R Owners Manual

Toyota CH-R Service Manual