DTC B1996, B1997, B1998, B1999


BHE080201046W18

DTC

B1996

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

B1997

Passenger-side side air bag module circuit short to body 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.
• Abnormal resistance (other than 1.4-3.2 ohms ) detected in the passenger-side side air bag module circuit
• Malfunction in the wiring harness between the passenger-side side air bag module and SAS unit

POSSIBLE CAUSE

• Open or short circuit in the wiring harness between the passenger-side side air bag module and SAS unit
• Passenger-side side air bag module malfunction
• SAS unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT PASSENGER-SIDE SIDE AIR BAG MODULE

• Using the WDS or equivalent, 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

[Present malfunction diagnosis]

• Replace the SAS unit.

[Past malfunction diagnosis]

• DTC troubleshooting completed.
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.
(See SERVICE WARNINGS.)
(SeeSERVICE CAUTIONS.)
• Turn the ignition 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.
• 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 ignition switch to the ON position.
• Using the WDS or equivalent, verify the following PID/DATA monitor.
– DSB_P_ST
• Are related wiring harnesses normal?
Yes
Replace the passenger-side side air bag module.
No
Replace the air bag wiring harness, then go to the next step.
4

INSPECT SAS UNIT

• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Connect the passenger-side side air bag module connector.
• Are DTCs B1996, B1997, B1998 and/or B1999 indicated?
Yes

[Present malfunction diagnosis]

• Replace the SAS unit.

[Past malfunction diagnosis]

• DTC troubleshooting completed.
No
DTC troubleshooting completed.