Connect scan tool with 'DATA LINK CONNECTOR' (DLC).
Warm engine up to normal operating temperature.
Turn all the electrical devices including air conditioner OFF.
Monitor "BRAKE SWITCH" and "REDUNDANT BRAKE SWITCH" parameter on the scan tool.
Specification :
When brake pedal is not pressed : "BRAKE SWITCH" and "REDUNDANT BRAKE SWITCH" is OFF.
When brake pedal is pressed : "BRAKE SWITCH" and "REDUNDANT BRAKE SWITCH" is ON.
Fig.1) Data when brake switch (brake pedal) is deactivated (released) : "BRAKE SWITCH" and "REDUNDANT BRAKE SWITCH" : OFF
Fig.2) Data when brake switch (brake pedal) is activated (depressed) : "BRAKE SWITCH" and "REDUNDANT BRAKE SWITCH" : ON