Pinpoint Test Bf : DTC B19A3: Notes

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

Pinpoint Test BF: DTC B19A3

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

Normal Operation

The Passenger Climate Controlled Seat Module - 2 (PCSM-2) supplies voltage and ground to the LH rear seat cushion Thermo-Electric Device (TED). The Passenger Climate Controlled Seat Module - 2 (PCSM-2) also sends a speed control voltage signal to the TED to control blower speed.

DTC B19A3 (Driver Seat Cushion Blower Speed Short to Battery) - If the LH rear seat cushion blower speed circuit is shorted to voltage, the PCSM-2 will shut down the LH rear seat system and set this DTC.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
TED and blower assembly
PCSM-2