DTC B1881, B1886

id080200803900

System malfunction location

• DTC B1881: Passenger-side pre-tensioner front buckle circuit resistance high

• DTC B1886: Passenger-side pre-tensioner front buckle 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.

• The SAS control module monitors the passenger-side pre-tensioner front buckle circuit resistance. If the SAS control module detects resistance which is not within the specification, it will output a pattern 47 flash to the air bag system warning light and store DTC B1881 or B1886 in memory.

Possible Cause

• Resistance between the SAS control module and the passenger-side pre-tensioner front buckle is not within the specification

• Resistance at the passenger-side pre-tensioner front buckle is not within the specification

• SAS control module internal malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION

1
Turn the ignition switch to the LOCK position.
Connect the WDS or the equivalent.
Turn the ignition switch to the ON position.
Using the WDS or equivalent, verify the DTCs and record the past malfunction DTCs.
Is the present malfunction DTC B1881 or B1886 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
Verify the following PIDs using the WDS or equivalent.
- PS_PTENS
Is the resistance of the passenger-side pre-tensioner front buckle normal?
- Resistance: 1.7-3.2 ohms
Yes
Go to the next step.
No
Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
After replacement, go to Step 5.
3
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.
(See SERVICE WARNINGS.)
(See SERVICE CAUTIONS.)
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.
Verify the following PIDs using the WDS or equivalent.
- PS_PTENS
Is the resistance of the passenger-side pre-tensioner front buckle normal?
- Resistance: 1.7-3.2 ohms
Yes
Repair the wiring harness between the SAS control module and the passenger-side pre-tensioner front buckle. After repair, go to Step 5.
No
Replace the passenger-side pre-tensioner front buckle.
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 an intermittent short to the power supply between the SAS control module and the passenger-side pre-tensioner front buckle. 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.