Normal Operation

The Dual Climate Controlled Seat Module (DCSM) monitors the Thermo-Electric Device (TED) circuits. If a short to ground or voltage on any of these circuits is detected, the DTC(s) will be set.

• 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