Brake Switch - TCC: Description and Operation

DESCRIPTION
This vehicle is equipped with two brake switches each containing multiple sets of contacts and performing several functions. Both switches are located under the left hand side of the Instrument Panel (I/P) on the brake pedal support.

BTSI SWITCH
The Stop/Brake-Transmission Shift Interlock (BTSI) /Cruise Brake Switch contains three sets of electrical contacts. Two sets of contacts are normally closed and one set is normally open.

The one normally open set of contacts is referred to as the stop lamp switch contacts and supplies power to the stop lamps when the brakes are applied. One set of normally closed contacts is referred to as the BTSI brake switch contacts and supplies power to the BTSI solenoid when the brakes are not applied. The other normally closed set of contacts is referred to as the cruise brake switch contacts and is used to disengage cruise when the brakes are applied.

TCC Switch
The Torque Converter Clutch (TCC) Brake Switch contains two sets of (normally closed) electrical contacts referred to as the Torque Converter Clutch (TCC) Brake and Extended Travel Brake Switch contacts.

The TCC brake switch contacts provide brake status to the PCM for torque converter clutch control. The extended travel brake switch contacts are used in Torque Management to determine whether the brakes are applied.