Pinpoint Test Ad : DTC B19A3: Notes

WARNING: This page is about a different car, the 2015 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.

Pinpoint Test AD: DTC B19A3

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

Normal Operation

The Dual Climate Controlled Seat Module (DCSM) supplies a speed control signal voltage to the driver seat cushion Thermo-Electric Device (TED) on circuit VHS18 (BN/GN). The TED blower is supplied operating voltage from DCSM output circuit CHS03 (GN/BN) and ground from DCSM output circuit RHS03 (GY/OG).

DTC B19A3 (Driver Seat Cushion Blower Speed Short to Battery) - If the driver seat cushion blower speed circuit is shorted to voltage, 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
TED and blower assembly
DCSM