DTC B1047, B1992, B1993, B1994, B1995

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DTC B1047, B1992, B1993, B1994, B1995

B3E080201046W18

DTC | B1047 | Driver-side side air bag module and other air bag module circuits short
--- | --- | ---
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 1.4-3.2 ohms detected in driver-side side air bag module circuit
• Malfunction in wiring harness between driver-side side air bag module and SAS control module

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.
(See PID/DATA MONITOR TABLE.)

  - DS_AB

• Is the resistance of the driver-side side air bag module normal?

  - Resistance: 1.4-3.2 ohms

Yes

Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)

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 front buckles, 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.
• 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 B1047, B1992, B1993, B1994, and/or B1995 indicated?

Yes

Go to the next step.

No | Replace the driver-side side air bag module. (See SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)

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 front seat connectors.
• Disconnect the driver and passenger-side curtain air bag module connectors.
• Remove the console.
• Inspect the wiring harness between SAS control module terminal 2B and driver-side side air bag module terminal A, SAS control module terminal 2F 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.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)

No | Replace the air bag wiring harness.