Pinpoint Test Aw : DTC B2729: Notes

Refer to Climate Controlled Seats , for schematic and connector information.

Normal Operation 

The Dual Climate Controlled Seat Module(DCSM) monitors seat cushion temperature while it supplies voltage and ground to both blower motors. The DCSM also supplies a variable voltage signal to control the blower speed. Cabin air enters the blower through a filter attached to the Thermo-Electric Device(TED) housing. Heated or cooled air exits the TED and flows through a manifold attached to the foam pad.

• DTC B2729 (Cushion Over-Temp Detected) - If the driver seat cushion TED temperature exceeds 70 °C (158 °F) in cool mode or 85 °C (185 °F) in heat mode for more than 34 seconds the DCSM shuts down the driver seat system and sets this DTC.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• Restricted cushion TED filter
• Crushed or restricted cushion foam pad
• Crushed or restricted climate controlled seat manifold
• Cushion TED assembly
• Dual Climate Controlled Seat Module(DCSM)