DTC B1996, B1997, B1998, B1999

id080200802000

DTC

B1996

Passenger‐side side air bag module circuit short to power supply

B1997

Passenger‐side side air bag module circuit short to ground

B1998

Passenger‐side side air bag module circuit resistance high

B1999

Passenger‐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 passenger-side side air bag module circuit
•  Malfunction in wiring harness between passenger-side side air bag module and SAS control module
POSSIBLE CAUSE
•  Open or short circuit in wiring harness between passenger-side side air bag module and SAS control module
•  Passenger-side side air bag module malfunction
•  SAS control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT PASSENGER-SIDE SIDE AIR BAG MODULE
•  Using the M-MDS, verify the following PID/DATA monitor.
―  PS_AB
•  Is the resistance of the passenger-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 PASSENGER‐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.
•  Turn the engine switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the passenger-side side air bag module.
•  Disconnect the passenger-side side air bag module connector.
•  Is there any malfunction of the passenger-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 PASSENGER‐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 passenger-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 engine switch to the ON position.
•  Are DTCs B1996, B1997, B1998 and/or B1999 indicated?
Yes
Go to the next step.
No
Replace the passenger-side side air bag module.
(See SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
4
INSPECT WIRING HARNESS BETWEEN PASSENGER-SIDE SIDE AIR BAG MODULE AND SAS CONTROL MODULE
•  Turn the engine switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Disconnect the passenger-side side air bag module connector.
•  Remove the console.
•  Disconnect the SAS control module connectors.
•  Inspect the wiring harness between SAS control module terminal 2L and passenger-side side air bag module terminal A, SAS control module terminal 2I and passenger-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
Go to the next step.
No
Replace the air bag wiring harness.
5
INSPECT AIR BAG SYSTEM WARNING LIGHT
•  Connect the all SAS control module connectors.
•  Connect the passenger‐side side air bag module connector.
•  Connect the negative battery cable.
•  Turn the engine switch to ON position.
•  Are DTCs B1996, B1997, B1998 and/or B1999 indicated?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
The system is normal at present. (Clear the malfunction from the memory.)