B1209

B1209 FRONTAL COLLISION DETECTION





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 Logic:

DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAG RESULT
With CONSULT-III
1. Turn ignition switch ON.
2. Perform "AIR BAG" Self Diagnostic Result.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check the air bag warning lamp status. Refer to Reading and Clearing Diagnostic Trouble Codes.

NOTE:
SRS does not enter diagnosis mode if no malfunction is detected in user mode.
Is malfunctioning part detected?
YES - Refer to B1209.
NO - INSPECTION END




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
Check front air bag modules. (Driver air bag module and/or front passenger air bag module.)
Is the front air bag module deployed?
YES - Replace front air bag modules. Refer to Exploded View or Exploded View.
NO - GO TO 2.
2.CHECK FRONT SEAT BELT PRE-TENSIONER
Check front seat belt pre-tensioner.
Is the front seat belt pre-tensioner activated?
YES - Replace front seat belt pre-tensioner. Refer to Exploded View.
NO - GO TO 3.
3.CHECK AIR BAG DIAGNOSIS SENSOR UNIT
Check air bag diagnosis sensor unit.
Is the front air bag module and/or front seat belt pre-tensioner activated?
YES - Replace air bag diagnosis sensor unit. Refer to Exploded View.
NO - GO TO 4.
4.CHECK STEERING WHEEL
Check steering wheel.
Is the steering wheel normal?
YES - GO TO 5.
NO - Replace steering wheel. Refer to Exploded View.
5.CHECK SPIRAL CABLE
1. Check the continuity of spiral cable.Refer to B1049.
2. Operate the steering wheel to check excessive heavy operation force, abnormal noise or damage.
Is the inspection result normal?
YES - GO TO 6.
NO - Replace spiral cable. Refer to Exploded View.
6.CHECK WIRING HARNESS/HARNESS CONNECTOR
Check wiring harness/harness connector.
Is the wiring harness/harness connector normal?
YES - GO TO 7.
NO - Replace wiring harness/harness connector.
7.FINAL CHECK
Perform "AIR BAG" Self Diagnostic Result with CONSULT-III and/or Air bag warning lamp status.
Is the inspection result normal?
YES - INSPECTION END
NO - Check the intermittent incident. Refer to Intermittent Incident.