Pinpoint Test BD : DTC B2730: Notes

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

Normal Operation 

The Dual Climate Controlled Seat Module(DCSM) monitors seat backrest 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 B2730 (Back Over-Temp Detected) -- If the driver seat backrest TED temperature exceeds 70 deg.C (158 deg.F) in cool mode or 85 deg.C (185 deg.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 backrest TED filter
• Crushed or restricted backrest foam pad
• Crushed or restricted climate controlled seat manifold
• Backrest TED assembly
• Dual Climate Controlled Seat Module(DCSM)