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 disables the affected seat and sets the following DTCs:

• DTC B1113 (Passenger Thermo-Electric Device Control Overtemperature Fault) - If the DCSM TED  driver integrated circuit temperature exceeds 175°C (347°F), the DCSM  will shut down the passenger seat system and set this DTC.
• DTC B111B (Passenger Thermo-Electric Driver Overcurrent Low) - If DCSM  outputs to the passenger seat backrest or cushion TED  (circuit pins 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 ohm is sensed, the DCSM  will shut down the passenger seat system and set this DTC.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• TED  assembly
• DCSM