Pinpoint Test BG : DTC B19A4: Notes

Refer to 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 backrest 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 B19A4 (Driver Seat Back Blower Speed Short to Battery) - If the LH rear seat backrest 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