Cruise Control - Operation Features

91saab03

CATEGORY
Electrical

SECTION PAGE
3 11
ISSUE CODE
09/91-0132 368


Subject: Cruise Control Operation

Application: 1992 9000 Models with Traction Control





As outlined in the Traction Control System (TCS) Service Manual, Sec. 2:5, the cruise control system for 9000 models with TCS is integrated into the Electronic Throttle System (ETS). The purpose of this PSI is to highlight two features of ETS-operated cruise control that are not found in other Saab cruise control systems.


Stepped adjustment of selected speed

During cruise control operation, it is possible to adjust the set speed in steps of 1 mph up or down.

^ To increase the speed in 1 mph increments, briefly press the SET speed button on the end of the turn signal stalk.

^ To decrease the selected speed in 1 mph increments, briefly press the RESUME switch.


Brake input signal check function (Automatic transmission only)

The ETS system in automatic transmission-equipped cars requires at least one brake signal input before the cruise control system will function. This means that the cruise control will not function in the unusual event that a driver starts the car, shifts into Drive and accelerates onto a highway without ever pressing the brake pedal. Since the cruise control will become operational after any subsequent brake pedal application, this situation could appear to the customer to be an intermittent fault.

Note that, while the Owner's Manual warns that the brakes should always be applied when shifting from Park to Drive, there is no specific information regarding this cruise control brake signal requirement for automatic transmission TCS cars.