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2008 - MX-5 - Restraints

DTC B1013



DTC B1013

Seat weight sensor calibration 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.

  • Calibration set value not within valid range.

POSSIBLE CAUSE

  • Weight acting on passenger-side seat during calibration

  • Improperly installed passenger-side seat part at time of calibration

  • Deformed floor where attached to passenger-side seat

  • Deformed passenger-side seat under-bracket or frame

  • Seat weight sensor deformed or malfunction

  • Seat weight sensor control module malfunction

  • SAS control module malfunction


Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT SEAT WEIGHT SENSOR

Yes

Replace the SAS control module.

(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)

No

Go to the next step.

2

INSPECT PASSENGER-SIDE SEAT
  • Turn the ignition switch to the LOCK position.

  • Disconnect the negative battery cable and wait for 1 min or more.

  • Remove the passenger-side seat and visually inspect for the following:

    • Seat under-bracket deformation

    • Seat frame deformation

    • Seat weight sensor deformation

    • Foreign objects stuck in seat

  • Are any of the parts deformed or are any foreign objects stuck in the seat?

Yes

Replace any deformed parts or remove any foreign objects.

  • After replacement, perform seat weight sensor calibration and reperform the DTC inspection. If the DTC is displayed, go the next step. (See SEAT WEIGHT SENSOR CALIBRATION.)

No

Go to the next step.

3

INSPECT FLOOR
  • Visually inspect the installation parts of the passenger-side seat for the following:

    • Abnormal floor deformation

    • Installation hole of passenger-side seat is improperly positioned

  • Is the floor normal?

Yes

Go to the next step.

No

Repair floor deformation.

  • After repair, perform seat weight sensor calibration and reperform the DTC inspection. If the DTC is displayed even though the floor has been repaired, go the next step. (See SEAT WEIGHT SENSOR CALIBRATION.)

4

INSPECT SEAT WEIGHT SENSOR CONTROL MODULE
  • Replace the seat weight sensor.

  • After replacement, perform seat weight sensor calibration. (See SEAT WEIGHT SENSOR CALIBRATION.)

  • Reperform the DTC inspection.

  • Is DTC B1013 indicated?

Yes

Replace the seat weight sensor control module.

(See SEAT WEIGHT SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)

  • After replacement, perform seat weight sensor calibration and reperform the DTC inspection. If the DTC is displayed even though the seat weight sensor control module has been replaced, replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)

No

DTC troubleshooting completed.




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