SSANGYONG Rexton 2004 Service Manual page 758

8E1-6
EBD (ELECTRONIC BRAKE FORCE DISTRIBUTION) SYSTEM
System Description
As an add-on logic to the ABS base algorithm, EBD works
in a range in which the intervention thresholds for ABS
control can not be reached.
EBD ensures that the rear wheels are sensitively moni-
tored for slip with respect to the front axle. If slip is
detected, the inlet valves for the rear wheels are switched
to pressure hold to prevent a further increase in pressure
at the rear-wheel breaks, thus electronically reproducing
a pressure-reduction function at the rear-wheel brakes.
ABS features an enhanced algorithm which includes con-
trol of the brake force distribution between the front and
rear axles. This is called Electronic Brake Distribution. In
an unloading car condition the brake efficiency is compa-
rable to the conventional system but for a fully loaden ve-
hicle the efficiency of the EBD system is higher due to the
better use of rear axle braking capability.
The Benefits of EBD
• Elimination of conventional proportioning valve EBD
utilizes the existing rear axle wheel speed sensor to
monitor rear wheel slip.
• Based on many variables in algorithm a pressure hold,
increase and/or decrease pulsetrain may be triggered
at the rear wheels insuring vehicle stability.
• Vehicle approaches the ideal brake force distribution
(front to rear).
• Constant brake force distribution during vehicle lifetime.
• EBD function is monitored via ABS safety logic
(conventional proportioning valves are not monitorable).
• "Keep alive" function.
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
Service precautions
Observe the following general precautions during any ABS/
TCS service. Failure to adhere to these precautions may
result in ABS/TCS system damage.
1. Disconnect the EBCM harness connector before
performing the electric welding procedures.
2. Carefully note the routing of the ABS/TCS wiring and
wiring components during removal. The ABS/TCS
components are extremely sensitive to EMI
(eletromagnetic interference). Proper mounting is
critical during component service.
3. Disconnect the EBCM connector with the ignition
OFF.
4. Do not hang the suspension components from the
wheel speed sensor cables. The cables may be
damaged.
5. Do not use petroleum based fluids in the master
cylinder. Do not use any containers previously used
for petroleum based fluids. Petroleum causes swelling
and distortion of the rubber components in the
hydraulic brake system, resulting in water entering
the system and lowering the fluid boiling point.
Front axle braking force
Y220_8E1006
ABS
REXTON SM - 2004.4