DTC B1933

id080200805300


System Malfunction Location

•  Passenger-side air bag module circuit resistance high

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.
•  The SAS control module monitors the resistance between passenger-side air bag module terminal 2J and 2G. If the SAS control module detects high resistance between the pins, it will store DTC B1933 in memory and output a pattern 33 flash to the air bag system warning light.

Possible Cause

•  Improper connection or corrosion in the passenger-side air bag module circuit
•  Open circuit or high resistance in the related wiring harness
•  Open circuit or high resistance in the passenger-side air bag module circuit
•  SAS control module internal malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
Turn the ignition switch to the LOCK position.
Connect the M-MDS.
Turn the ignition switch to the ON position.
Using the M-MDS, verify the DTCs and record the past malfunction DTCs.
Is the present malfunction DTC B1933 displayed?
Yes
Note
•  Indicates a hard malfunction. The malfunction is still present. This malfunction cannot be cleared until it is corrected and the DTC is no longer displayed.
Go to the next step.
No
Intermittent malfunction. The malfunction is not present at this time. Go to Step 4.
2
Warning
•  Handling the components improperly can accidentally deploy the air bags and pre-tensioner front buckle, which may seriously injure you. Read the service warnings and cautions before handling the SRS air bag system components.
Turn the ignition switch to the LOCK position.
Refer to the air bag system deactivation procedure and deactivate the system.
Turn the ignition switch to the ON position.
Perform the DTC inspection.
Is the present malfunction DTC B1933 displayed?
Yes
Go to the next step.
No
Replace the passenger-side air bag module.
(See PASSENGER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
After replacement, go to Step 5.
3
Turn the ignition switch to the LOCK position.
Disconnect SAS control module connector.
Disconnect the SST (diagnostic simulator) from passenger-side air bag connector.
Measure the resistance between passenger-side air bag module terminal A and B.
Note
•  Measure the resistance while shaking the wiring harness between the SAS control module and passenger-side air bag module.
Is the resistance more than 0.5 ohms?
Yes
Repair the related wiring harness. After repair, go to Step 5.
No
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
After replacement, go to Step 5.
4
Refer to the past malfunction DTCs recorded during Step 1
Are the past malfunction DTCs displayed during Step 1 intermittent malfunctions which are not displayed as present malfunction DTCs?
Yes
Inspect for the cause of intermittent high resistance between the passenger-side air bag module and the SAS control module. Attempt to replicate the malfunction by flexing the wiring harness and cycling the ignition key between the ON and LOCK position repeatedly. Repair or replace if there is any intermittent malfunction.
After repair or replacement, go to the next step.
No
Go to the next step.
5
Refer to the past malfunction DTCs recorded during Step 1
Was any past malfunction DTC displayed during Step 1?
Yes
If any DTC is displayed, refer to the DTC table, and repair the malfunctioning part according to the DTC inspection.
No
Refer to the reactivation procedure in the air bag system deactivation procedure, reactivate the system. Clear all DTCs.