DTC B1992, B1993, B1994, B1995

id0802a0801900

DTC

B1992

Driver-side side air bag module circuit short to power supply

B1993

Driver-side side air bag module circuit short to body ground

B1994

Driver-side side air bag module circuit resistance high

B1995

Driver-side side air bag module circuit resistance low

DETECTION CONDITION

Warning
• Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure.
• Resistance other than 1.9-2.6 ohms detected in the driver-side side air bag module circuit
• Wiring harness between the driver-side side air bag module and SAS control module has a malfunction.

POSSIBLE CAUSE

• Open or short circuit in wiring harness between driver-side side air bag module and SAS control module
• Driver-side side air bag module malfunction
• SAS control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT DRIVER-SIDE SIDE AIR BAG MODULE
• Using the WDS or equivalent, verify the following PID/DATA monitor.
- OD_DSAB_ST
• Is the resistance of the driver-side side air bag module normal?
- Resistance: 1.9-2.6 ohms
Yes
Replace the SAS control module.
No
Go to the next step.
2
INSPECT DRIVER-SIDE SIDE AIR BAG MODULE CONNECTOR
Warning
• Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings and cautions before handling the air bag system components.
(See SERVICE WARNINGS.)
(See SERVICE CAUTIONS.)
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Remove the driver-side side air bag module.
• Disconnect the driver-side side air bag module connector.
• Is there any malfunction of the driver-side side air bag module connector?
Yes
Replace the air bag wiring harness.
No
Go to the next step.
3
VERIFY WHETHER MALFUNCTION IS IN DRIVER-SIDE SIDE AIR BAG MODULE OR RELATED WIRING HARNESS
• Connect the leads of the SST (Fuel and thermometer checker) or apply 2-ohm resistance to driver-side side air bag module connector terminals A and B.
• Set the resistance of the SST (Fuel and thermometer checker) to the 2-ohm position.
• Connect the negative battery cable.
• Turn the ignition switch to the ON position.
• Are DTCs B1992, B1993, B1994, and/or B1995 indicated?
Yes
Go to the next step.
No
Replace the driver-side side air bag module.
4
INSPECT WIRING HARNESS BETWEEN DRIVER-SIDE SIDE AIR BAG MODULE AND SAS CONTROL MODULE
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Disconnect the driver and passenger-side side air bag connectors.
• Disconnect the driver and passenger-side curtain air bag module connectors.
• Remove the console.
• Inspect the wiring harness between SAS control module terminal 1M and driver-side side air bag module terminal A, SAS control module terminal 1Q and driver-side side air bag module terminal B for the following:
- Short to ground
- Short to power supply
- Open circuit
• Is the wiring harness normal?
Yes
Replace the SAS control module.
No
Replace the air bag wiring harness.