Rainier 2WD V8-5.3L VIN P (2004)
Heated Glass Element: Scan Tool Testing and Procedures
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.
HVAC Control Module
Liftgate Module (LGM)
Scan Tool Output Controls - Liftgate Module (LGM)
