Journey AWD V6-3.5L (2009)
Parking Brake Warning Switch: Description and Operation
Parking Brake Switch - Operation
OPERATION
Both the foot-operated and hand-operated park brake switch are normally closed, mechanically actuated leaf contact switches that are operated by the
foot or hand park brake lever mechanism. The switch is grounded through its mounting to the park brake lever mechanism and provides a ground input to
the Electro Mechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN) on a park brake switch sense circuit whenever the
park brake is applied, and opens this circuit whenever the park brake is released. The park brake switch sense input to the EMIC is used as a logic input
by the EMIC for control of the brake indicator and may also be used as a logic input for other electronic features in the vehicle.
The park brake switch as well as the hard wired inputs and outputs of the switch may be diagnosed using conventional diagnostic tools and procedures.
Refer to the appropriate wiring information. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the electronic
controls and communication between other modules and devices that rely upon inputs from the park brake switch. The most reliable, efficient, and
accurate means to diagnose the electronic controls and communication related to park brake switch operation requires the use of a diagnostic scan tool.
Refer to the appropriate diagnostic information.
