Chrysler 2007 PT Cruiser Convertible Instruction Manual page 186

186 UNDERSTANDING THE FEATURES OF YOUR VEHICLE
To turn the system OFF, press the TCS switch until the
traction control indicator in the instrument cluster lights
up.
Traction Control Switch
To turn the system back ON, press the switch a second
time until the traction control indicator turns OFF.
NOTE: The traction control indicator will illuminate
momentarily as a bulb check, each time the ignition
switch is turned ON. This will occur even if you used the
TCS switch to turn the system OFF.
NOTE: The Traction Control System will make buzzing
or clicking sounds when the system is in operation.