B1209 FRONTAL COLLISION DETECTION

B1209

Description
DTC Logic
Diagnosis Procedure

Description

DTC B1209 FRONTAL COLLISION DETECTION

When crash zone sensor detects component damage resulting from a front collision, the system blinks or illuminates the air bag warning lamp to inform the driver. Malfunctioning can be detected by CONSULT-III.

OPERATION

The air bags and seat belt pre-tensioners for driver and front passenger are activated by the air bag diagnosis sensor unit signal transmitted at the time of the frontal collision.

STRUCTURE

It consists of crash zone sensor, air bag diagnosis sensor unit, air bags and seat belt pre-tensioners for driver and front passenger.

INSTALLATION

Refer to Exploded View (Driver air bag module), Exploded View (Front passenger air bag module), Exploded View(Crash zone sensor), Exploded View (Air bag diagnosis sensor unit), Exploded View (Front LH/RH seat belt pre-tensioner).

DTC Logic

DTC No.	Trouble diagnosis name	DTC detecting condition	Possible cause
B1209	FRONTAL COLLISION DETECTION	Front seat belt pre-tensioner, front air bag is deployed	—

DTC CONFIRMATION PROCEDURE

1.CHECK SELF-DIAG RESULT

Diagnosis Procedure

■ WARNING ■

Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3 minutes. (To discharge backup capacitor.)

Never use unspecified tester or other measuring device.

1.CHECK FRONT AIR BAG MODULE

2.CHECK FRONT SEAT BELT PRE-TENSIONER

3.CHECK AIR BAG DIAGNOSIS SENSOR UNIT

4.CHECK STEERING WHEEL

5.CHECK SPIRAL CABLE

6.CHECK WIRING HARNESS/HARNESS CONNECTOR

7.FINAL CHECK