Switch, TCS ON/OFF: Notes

WARNING: This page is about a different car, the 2001 Saab 9-5. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: TCS Switch ON/OFF - Communication Diagram

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: TCS Switch ON/OFF - Circuit Diagram

Courtesy of SAAB-SCANIA OF AMERICA, INC.

The TCS function can be turned ON/OFF by means of a spring-loaded switch on the dashboard to the right of the steering wheel. Turning the TCS function off causes the TCS OFF lamp on the main instrument unit to light up.

This switch is connected to pin 31 of the TC/ABS control module and to grounding point G41S. The TC/ABS control module applies B+ to pin 31. Pressing the button in connects the circuit to ground and the TCS function is enabled or disabled, depending on the position of the switch.

The switch can be used to disengage the TCS function at speeds below 60 km/h (37.5 mph) or to engage it at any speed. The TCS function is always engaged when the ignition is turned ON.

When disengaging the TCS function, the TCS OFF lamp will be turned on by a bus message to MIU.