B1052

B1052, B1057 DRIVER AIR BAG MODULE





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-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. 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 - SEE 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). Exploded View.
4.REPLACE AIR BAG DIAGNOSIS SENSOR UNIT
1. Replace air bag diagnosis sensor unit. Diagnosis Sensor Unit
2. Perform DTC confirmation procedure. SEE DTC Logic.
Is DTC detected?
YES - GO TO 5.
NO - INSPECTION END
5.REPLACE DRIVER AIR BAG MODULE
1. Replace driver air bag module. Exploded View
2. Perform DTC confirmation procedure. SEE DTC Logic.
Is DTC detected?
YES - GO TO 1.
NO - INSPECTION END