DTC B2445, U2018

id080200802800

DTC

B2445

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

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

Diagnostic procedure

Step

Inspection

Action
1
INSPECT PASSENGER-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 (passenger's side). (See INNER SCUFF PLATE REMOVAL/INSTALLATION.)
•  Remove the seat belt rail for the front seat (passenger's side). (See FRONT SEAT BELT REMOVAL/INSTALLATION.)
•  Partially peel back the floor covering.
•  Disconnect the passenger-side side air bag sensor connector. (See SIDE AIR BAG SENSOR REMOVAL/INSTALLATION.)
•  Inspect the passenger-side side air bag sensor connection. (Corrosion, damage, and disconnected pins)
•  Is there any malfunction of the passenger-side side air bag sensor connector?
Yes
Replace the passenger-side side air bag sensor wiring harness.
No
Go to the next step.
2
INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND PASSENGER-SIDE SIDE AIR BAG SENSOR
•  Disconnect all SAS control module connectors.
•  Inspect the wiring harnesses between SAS control module connector terminal 2B and passenger-side side air bag sensor connector terminal A, and SAS control module connector terminal 2C and passenger-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 passenger-side side air bag sensor.
•  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 wiring harness between the SAS control module and the passenger-side side air bag sensor.
3
INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND PASSENGER-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 2B and 2C.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and passenger-side side air bag sensor.
•  Is the voltage measured?
Yes
Replace the wiring harness between the SAS control module and the passenger-side side air bag sensor.
No
Replace the passenger-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 front seat belt (passenger's side).
•  Connect the passenger-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.
(See DTC DISPLAY.)
•  Are DTCs B2445 and/or U2018 displayed?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.