DTC B104C, B104F, B1050, U2018

id080200810900

DTC

B104C

Passenger‐side side air bag sensor and other sensor circuits short to power supply

B104F

Passenger‐side side air bag sensor (internal circuit abnormal)

B1050

Passenger‐side side air bag sensor circuit open or short

U2018

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

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT PASSENGER‐SIDE SIDE AIR BAG SENSOR 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 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 sensor connector.
•  Is there any malfunction of the passenger-side side air bag sensor connector?
Yes
Replace the air bag wiring harness.
No
Go to the next step.
2
INSPECT WIRING HARNESS BETWEEN PASSENGER-SIDE SIDE AIR BAG SENSOR AND SAS CONTROL MODULE
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Disconnect the driver and passenger-side front seat connectors.
•  Disconnect the driver and passenger-side curtain air bag module connectors.
•  Remove the console.
•  Disconnect the SAS control module connector.
•  Disconnect the passenger-side side air bag sensor connector.
•  Connect the negative battery cable.
•  Inspect the wiring harnesses between SAS control module terminal 2K and passenger-side side air bag sensor terminal A, SAS control module terminal 2G and passenger-side side air bag sensor terminal B for the following:
―  Short to ground
―  Short to power supply
―  Open circuit
•  Is the wiring harness normal?
Yes
Replace the passenger-side side air bag sensor, then go to the next step.
(See SIDE AIR BAG SENSOR REMOVAL/INSTALLATION.)
No
Replace the air bag wiring harness.
3
INSPECT SAS CONTROL MODULE
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Connect the SAS control module connector.
•  Connect the passenger-side side air bag sensor connector.
•  Are DTCs B104C, B104F, B1050 and/or U2018 indicated?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.