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 cushion temperature on circuit VHS26 (VT). 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 VHS18 (BN/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 B2729 (Cushion Over-Temp Detected) - In the heating mode, if the driver seat cushion TED temperature exceeds 85°C (185°F) for more than 34 seconds, the TED is disconnected or the duct is blocked, the DCSM will shut down the driver seat system and set this DTC.
- DTC B2729 (Cushion Over-Temp Detected) - In the cooling mode, if the driver seat cushion TED temperature exceeds 70°C (158°F) for more than 34 seconds, the TED is disconnected or the duct is blocked, the DCSM will shut down the driver seat system and set this DTC.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Restricted cushion TED filter
- Crushed or restricted climate controlled seat manifold
- Cushion TED assembly