B1054

Description

In case of frontal collision where acceleration is more than the specified level, the ignition materials are ignited by electric ignition system. The system burns the gas generating materials resulting in a chemical reaction.
This generates hot gases that flow into the air bag through a filter and expand the bag.


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 "Diagnosis with Air Bag Warning Lamp" Diagnosis With Air Bag Warning Lamp.
NOTE:
SRS does not enter the diagnosis mode if no malfunction is detected in the 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 3 minutes or more. (To discharge backup capacitor.)
- Never use unspecified tester or other measuring device.

1. CHECK HARNESS CONNECTOR

Check the harness connector.
Is the inspection result normal?
YES- GO TO 2.
NO- Replace harness connector.

2. CHECK WIRING HARNESS

Check the wiring harness externals.
Is the inspection result normal?
YES- GO TO 3.
NO- Replace wiring harness.

3. CHECK SPIRAL CABLE CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect driver air bag module connector and combination switch (spiral cable) connector.
3.Check continuity between driver air bag module harness connector and combination switch (spiral cable)
harness connector.





4.Check continuity between driver air bag module harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Replace combination switch (spiral cable). Refer to "Exploded View" Exploded View.

4. REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.Replace air bag diagnosis sensor unit. Refer to "Exploded View" Exploded View
2.Perform DTC confirmation procedure. Refer to "DTC Logic" .
Is DTC detected?
YES- GO TO 5.
NO- INSPECTION END

5. REPLACE DRIVER AIR BAG MODULE

1.Replace driver air bag module. Refer to "Exploded View" Exploded View
2.Perform DTC confirmation procedure. Refer to "DTC Logic" .
Is DTC detected?
YES- GO TO 1.
NO- INSPECTION END