Drive Mode Description and Operation: Notes

The drive mode system is a customer configurable control that allows the vehicle operator to tailor the vehicle operation and driveability parameters based on driving conditions. The drive mode is controlled by the vehicle operator through the S126 Drive Mode Select Switch. The S126 Drive Mode Select Switch is a single throw, double pole rocker switch. Pressing the switch up and down will change to the next drive mode.

The S126 Drive Mode Select Switch is an input to the K20 Engine Control Module. When the switch is pressed, the K20 Engine Control Module will broadcast a message to all modules indicating the requested drive mode. Control modules that are involved in changing their operation based on differing drive modes will then change their operating values.

The components of the drive mode are:

• S126 Drive Mode Select Switch
• K20 Engine Control Module

Other control modules or components that may respond to the commanded drive mode are:

• K17 Electronic Brake Control Module
• K19 Suspension Control Module
• K38 Chassis Control Module
• K43 Power Steering Control Module
• K47 Rear Differential Clutch Control Module
• K71 Transmission Control Module
• P16 Instrument Cluster