Pinpoint Test AO: DTC B19A8: Notes

Refer to Climate Controlled Seats for schematic and connector information.

Normal Operation 

The DCSM supplies a speed control signal voltage to the driver seat backrest TED on circuit CHS04 (YE/GY). The TED blower is supplied operating voltage from DCSM output circuit CHS13 (VT/BN) and ground from DCSM output circuit CHS03 (GN/BN).

• DTC B19A8 (Driver Seat Back Blower Speed Short to Ground) - If the driver seat backrest blower speed circuit is shorted to ground, 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