Vented Seat Switch - Operation

OPERATION

The two vented seat switches are momentary push button type switches that are used to operate the front vented seats. When a vented seat switch is pressed, Light Emitting Diode(s) (LEDs) on the face of that switch will illuminate to indicate the desired mode for that particular vented seat, and a request signal is sent over the Controller Area Network (CAN) bus to the Heated Seat Module (HSM), also know as the comfort seat wheel module. The HSM provides variable analog voltages that drive the two 12 volt vented seat motors in the seat. There are three settings for each vented seat; off, hi and lo. The vented seat system always starts in the off setting, where none of the LEDs on the switches are illuminated. Pressing a switch once will change the setting for that particular seat from off to hi, and will illuminate both LEDs on the switch. Pressing the same vented seat switch again will change the setting from hi to lo, and only one LED on that switch will illuminate. Pressing the switch once again will change the setting from lo to off again. If for any reason a fault in the vented seat system becomes present, a Diagnostic Trouble Code (DTC) will set and a LED in the vented seat switch will illuminate for two seconds and then go out.

The vented seat switches are diagnosed using a scan tool Testing and Inspection.

The vented seat switches cannot be adjusted or repaired and the entire A/C-heater control must be replaced if either switch is inoperative or damaged A/C And Heater Control - Removal.