DTC B2444, U2017

id080200802700

DTC

B2444

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

U2017

Driver‐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 the wiring harness between the driver-side side air bag sensor and SAS control module
•  Malfunction in the driver-side side air bag sensor circuit
POSSIBLE CAUSE
•  Driver-side side air bag sensor connector malfunction
•  Driver-side side air bag sensor malfunction
•  Open circuit or short to ground in the wiring harness between the driver-side side air bag sensor and SAS control module
•  Open circuit or power supply short in the wiring harness between the driver-side side air bag sensor and SAS control module
•  SAS control module malfunction

Diagnostic procedure

Step

Inspection

Action
1
INSPECT DRIVER-SIDE SIDE AIR BAG SENSOR CONNECTOR
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the inner scuff plate (driver's side). (See INNER SCUFF PLATE REMOVAL/INSTALLATION.)
•  Remove the seat belt rail for the front seat (driver's side). (See FRONT SEAT BELT REMOVAL/INSTALLATION.)
•  Partially peel back the floor covering.
•  Disconnect the Driver-side side air bag sensor connector.
•  (See SIDE AIR BAG SENSOR 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 SAS CONTROL MODULE AND DRIVER-SIDE SIDE AIR BAG SENSOR
•  Disconnect all SAS control module connectors.
•  Inspect the wiring harnesses between SAS control module connector terminal 2Z and driver-side side air bag connector terminal A, and SAS control module terminal 2AA and driver-side side air bag sensor 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 driver-side side air bag sensor.
•  Is the wiring harness normal?
Yes
Replace the Driver-side side air bag sensor, then go to the next step.
(See SIDE AIR BAG SENSOR REMOVAL/INSTALLATION.)
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.
•  Measure the voltage of SAS control module connector terminals 2Z and 2AA.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and 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 SENSOR REMOVAL/INSTALLATION.)
4
PERFORM DTC INSPECTION
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Install the front seat belt (driver's side).
•  Connect the Driver-side side air bag sensor connector.
•  Connect the SAS control module connectors.
•  Connect the negative battery cable.
•  Perform the DTC inspection for the SAS control module using the M-MDS.
•  Are DTCs B2444 and/or U2017 displayed?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.