Kia 2004.5 Spectra Service Technical Training page 186

ANTILOCK BRAKE SYSTEM
16
Spectra ABS is a 4-channel system with a MGH-20
HECU. The system houses an inlet valve and outlet
valve for each wheel. The pump and valve assembly
are similar to other Kia models' ABS/EBD systems.
The HECU has a min/max operating range of 9.7 to 18
volts with a normal operating range of 12-14 volt
range through the two 30A fuses. When voltage above
16V is detected, the HECU shuts down the ABS, and
turns the ABS lamp ON until system voltage returns to
normal.
The Hydraulic and Electronic Control Unit (HECU)
controls the Anti-Lock Braking System (ABS). This
HECU has the following functions:
• Input signal from the wheel speed sensors
attached to each wheel
• Control of braking force and traction force
• Failsafe function
• Self diagnosis function
• Interface with the Hi-Scan Pro
• Apply and release inlet and outlet valves for each
wheel.
2004.5 Spectra Technology
Brakes