Kia 2004.5 Spectra Service Technical Training page 178

2004.5 Spectra Technology
The proportioning valves are a mechanical device
mounted under the master cylinder in the diagonal
brake system only on the CBS (non-ABS). During
braking, these valves regulate pressure to the rear
brakes to create balanced braking between the front
and rear wheels. The proportioning valves used on the
4-door and 5-door Spectra models are different due to
different cut-in pressure and decompression ratio (27:1
and 32:1).
The parking brake holds the parked vehicle when the
driver pulls up on the handle, which pulls a cable
attached to a lever and cam at each rear brake
caliper. By pulling the handle, the cable extends each
piston to apply the pads. The parking brake cable
needs to be adjusted periodically but the disc pads
are self-adjusting.
ANTILOCK BRAKE
SYSTEM (ABS)
The ABS is optional and supplements the CBS. The
ABS is idle until there is a braking situation that causes
impending lock-up of one or more wheels of the
vehicle.
Brakes
8