Normal Operation

The seat cushion and backrest are equipped with a Thermo-Electric Device (TED) assembly that includes a seat blower (fan motor, serviced as an assembly with the TED  ). When the Dual Climate Controlled Seat Module (DCSM) detects an overcurrent and/or overtemperature in the output circuits to the TEDs  , it will disable the affected seat and set the following DTCs:

• DTC B1113 (Passenger Thermal Electric Device Control Overtemperature Fault) - If the DCSM TED  driver integrated circuit temperature exceeds 175°C (347°F), the DCSM  shuts down the passenger seat system and sets this DTC.
• DTC B111B (Passenger Thermoelectric Driver Overcurrent Low) - If DCSM  outputs to the passenger seat backrest or cushion TED  (circuit pin A, B, C or D at the DCSM  connector) or any components within these circuit loops are shorted to ground or a TED  resistance of less than 0.9 ohms is sensed, the DCSM  shuts down the passenger seat system and sets this DTC.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• TED  assembly
• DCSM