B1209

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.

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" Exploded View (Driver air bag module), "Exploded View" Exploded View (Front passenger air bag module), "Exploded View" Exploded View(Crash zone sensor), "Exploded View" Exploded View (Air bag diagnosis sensor unit), "SEAT BELT RETRACTOR : Exploded View" Exploded View (Front LH/RH seat belt pre-tensioner).


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. CHECK SELF-DIAG RESULT

With CONSULT
1.Turn ignition switch ON.
2.Perform "AIR BAG" Self Diagnostic Result.
Without CONSULT
1.Turn ignition switch ON.
2.Check the air bag warning lamp status. Refer to "Air Bag Warning Lamp Diagnosis" Air Bag Warning Lamp Diagnosis.
NOTE:
SRS does not enter diagnosis mode if no malfunction is detected in user mode.
Is malfunctioning part detected?
YES- Refer to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


WARNING:
- Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait at least 3
minutes or more. (To discharge backup capacitor.)
- Never use unspecified tester or other measuring device.

1. PERFORM COLLISION DIAGNOSIS

Perform collision diagnosis. Refer to "FOR FRONTAL COLLISION : When SRS is activated in a collision" When SRS Is Activated In A Collision or "FOR FRONTAL COLLISION : When SRS is not activated in a collision" When SRS Is Not Activated In A Collision.
Is collision diagnosis complete?
YES- GO TO 2.
NO- INSPECTION END

2. FINAL INSPECTION

Perform "AIR BAG" Self Diagnostic Result.
Is the inspection result normal?
YES- INSPECTION END
NO- Perform diagnosis of applicable DTC. Refer to "DTC Index" Testing and Inspection.