B103A Possible Causes
- Faulty Right Front Seat Heater Sensor
- Right Front Seat Heater Sensor harness is open or shorted
- Right Front Seat Heater Sensor circuit poor electrical connection
First diagnose B103A code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
B103A Tech NotesB103A:11 Right Front Seat Heater Sensor: Circuit Short To Ground
B103A:12 Right Front Seat Heater Sensor: Circuit Short To Battery
Cost of diagnosing the B103A code
Labor: 1.0The cost of diagnosing the B103A code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B103A Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B103A MeaningThe engine must be running for the heated seat system to operate. The driver and passenger heated seat buttons are selected from the touchscreen interface, which initiates the CAN communication to request heated seat operation. Upon receiving the request, the Heating, Ventilation, and Air Conditioning (HVAC) Module supplies voltage to the appropriate driver and/or passenger seat cushion and backrest heater mats, which are connected in series. Temperature is maintained by the HVAC module using a sensor contained within the cushion heater mat. The HVAC module supplies a reference voltage to the temperature sensor and monitors the return signal from the temperature sensor for controlling current flow to the heater mats. The HVAC module remains on, heating the seat and maintaining temperature until commanded off from the touchscreen (or until the ignition is turned OFF).
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