DTC B104B, B1051, B2887, U2017

id080200004300

DTC

B104B

Driver-side air bag sensor assembly incorrect

B1051

Driver-side side air bag sensor system internal circuit disabled

B2887

Driver-side side air bag sensor system communication data error

U2017

Driver-side side air bag sensor system 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.
•  The SAS control module detects an error of impact magnitude set in the sensor, which occurs due to installation mismatch of the crash zone sensor or side air bag sensors.
•  Malfunction in wiring harness between driver-side side air bag sensor and SAS control module
•  Malfunction in driver-side side air bag sensor circuit
POSSIBLE CAUSE
•  Driver-side side air bag sensor mis-installed with wrong sensor
•  Driver-side side air bag sensor connector malfunction
•  Open or short circuit in wiring harness between driver-side side air bag sensor and SAS control module
•  Driver-side side air bag sensor malfunction
•  SAS control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT DRIVER-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.
•  Remove the battery cover.
•  Disconnect the negative battery cable and wait for 1 min or more. (See BATTERY REMOVAL/INSTALLATION [L8, LF].)
•  Remove the tire house trim (driver-side). (See TIRE HOUSE TRIM REMOVAL/INSTALLATION.)
•  Disconnect the driver-side side air bag sensor connector. (See SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
•  Inspect the driver-side side air bag sensor connector. (Corrosion, damage, and disconnected pins)
•  Is there any malfunction of the driver-side side air bag sensor connector?
Yes
Replace the driver-side side air bag sensor wiring harness.
No
Go to the next step.
2
INSPECT WIRING HARNESS BETWEEN DRIVER-SIDE SIDE AIR BAG SENSOR AND SAS CONTROL MODULE
•  Remove the column cover.
•  Disconnect the clock spring connector.
•  Remove the glove compartment.
•  Disconnect the passenger-side air bag module connector.
•  Disconnect the driver and passenger-side seat connectors.
•  Remove the back trim.
•  Disconnect the driver and passenger-side pre-tensioner seat belt connectors.
•  Remove the console panel.
•  Disconnect the SAS control module connectors.
•  Inspect the wiring harnesses between SAS control module connector terminal 2F and driver-side side air bag sensor connector terminal A, SAS control module connector terminal 2C and driver-side side air bag sensor connector terminal B for the following:
―  Short circuit between terminals
―  Short to body ground
―  Open circuit
Note
•  Inspect for continuity while shaking the wiring harness between the SAS control module and the driver-side side air bag sensor.
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the wiring harness between the SAS control module and the driver-side side air bag sensor.
3
INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND DRIVER-SIDE SIDE AIR BAG SENSOR FOR A SHORT CIRCUIT TO THE POWER SUPPLY
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position with SAS control module connector and driver-side side air bag sensor connector disconnected.
•  Measure the voltage of SAS control module connector terminals 2F and 2C.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and the driver-side side air bag sensor.
•  Is the voltage measured?
Yes
Replace the wiring harness between the SAS control module and the driver-side side air bag sensor.
No
Replace the driver-side side air bag sensor, then go to the next step.
(See SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
4
PERFORM SAS CONTROL MODULE DTC INSPECTION
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Reconnect all disconnected connectors.
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Clear the DTC for the SAS control module using the M-MDS.
•  Perform the DTC inspection for the SAS control module using the M-MDS.
•  Are the same DTCs present?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.