Normal Operation
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The Dual Climate Controlled Seat Module (DCSM) monitors the seat backrest temperature on circuit VHS35 (VT/OG). The DCSM supplies voltage to both blowers on circuit CHS03 (GN/BN), ground to both blowers on circuit RHS03 (GY/OG) and supplies a variable voltage to circuit VHS16 (BU/GN) to control the blower speed. Cabin air enters the blower through a filter attached to the Thermo-Electric Device (TED) housing. Conditioned air exits the TED and flows through a manifold attached to the foam pad.
- DTC B2730 (Back Over-Temp Detected) - If the driver seat backrest TED temperature exceeds 85°C (185°F) in cool mode or 70°C (158°F) in heat mode for more than 34 seconds the DCSM will shut down the driver seat system and set.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Restricted backrest TED filter
- Crushed or restricted climate controlled seat manifold
- Backrest TED assembly