Scan Tool Data Definitions

SCAN TOOL DATA DEFINITIONS

HVAC CONTROL MODULE

Rear Defrost Switch; The scan tool displays On/Off. When the rear window defogger switch is depressed, the scan tool will momentarily display On.

LIFTGATE MODULE (LGM)

Defog Relay Voltage: The scan tool displays the voltage at the rear window defogger grid.

Rear Defog Requested: The scan tool displays Yes/No. When the rear window defogger switch is depressed, the HVAC control module sends a class 2 message to the LGM to enable the rear window defogger. The LGM enables the rear window defogger, which the scan tool displays as Yes.