DTC B1881, B1882, B1883, B1886

id080200801500

DTC

B1881

Passenger-side pre-tensioner seat belt circuit resistance high

B1882

Passenger-side pre-tensioner seat belt circuit short to power supply

B1883

Passenger-side pre-tensioner seat belt circuit short to body ground

B1886

Passenger-side pre-tensioner seat belt 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 1.5—3.1 ohms) detected in the passenger-side pre-tensioner seat belt circuit
•  Malfunction in the wiring harness between the passenger-side pre-tensioner seat belt and SAS control module
POSSIBLE CAUSE
•  Passenger-side pre-tensioner seat belt connector malfunction
•  Passenger-side pre-tensioner seat belt malfunction
•  Open circuit or short to ground in the wiring harness between the passenger-side pre-tensioner seat belt and SAS control module
•  Open circuit or power supply short in the wiring harness between the passenger-side pre-tensioner seat belt and SAS control module
•  SAS control module malfunction

Diagnostic procedure

Step

Inspection

Action
1
INSPECT PASSENGER SIDE PRE-TENSIONER SEAT BELT CONNECTOR
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the following parts:
―  Rear door lower trim (passenger's side)
―  Rear door upper trim (passenger's side)
―  Rear seat cushion
―  Front seat belt (passenger'sside)
•  Inspect the passenger-side pre-tensioner seat belt connector. (Corrosion, damage, and disconnected pins)
•  Is there any malfunction of the passenger-side pre-tensioner seat belt connector?
Yes
Replace the passenger-side pre-tensioner seat belt wiring harness.
No
Go to the next step.
2
INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT
•  Connect the SST (Fuel and thermometer checker) or apply 2-ohm resistance to the passenger-side pre-tensioner seat belt connector terminals A–B.
•  Set the SST (Fuel and thermometer checker) to 2 ohm.
•  Connect the negative battery cable.
•  Perform the DTC inspection for the SAS control module using the M-MDS.
•  Are DTCs B1881, B1882, B1883 and/or B1886 displayed?
Yes
Go to the next step.
No
Replace the passenger-side pre-tensioner seat belt.
(See FRONT SEAT BELT REMOVAL/INSTALLATION.)
3
INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND PASSENGER-SIDE PRE-TENSIONER SEAT BELT
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Disconnect the SST (Fuel and thermometer checker) or the 2 ohm resistance.
•  Disconnect all SAS control module connectors.
•  Inspect the wiring harnesses between SAS control module connector terminal 2J and passenger-side pre-tensioner seat belt connector terminal A, and SAS control module connector terminal 2G and passenger-side pre-tensioner seat belt connector terminal B for the following:
―  Short to body ground
―  Open circuit
Note
•  Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side pre-tensioner seat belt.
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the wiring harness between the SAS control module and the passenger-side pre-tensioner seat belt.
4
INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND PASSENGER-SIDE PRE-TENSIONER SEAT BELT FOR A SHORT CIRCUIT TO THE POWER SUPPLY
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Measure the voltage of SAS control module connector terminals 2J and 2G.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and passenger-side pre-tensioner seat belt.
•  Is the voltage measured?
Yes
Replace the wiring harness between the SAS control module and the passenger-side pre-tensioner seat belt.
No
Go to the next step.
5
INSPECT DTCs
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Connect the disconnected connector.
•  Connect the negative battery cable.
•  Clear DTCs using the M-MDS.
•  Verify DTCs using the M-MDS.
•  Is DTC B1881, B1882, B1883 and/or B1886 displayed again?
•  Are there other DTCs output?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.