2005 SSANGYONG RODIUS brake

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RODIUS 2005.07
4892-01
ABS SYSTEM
2) HYDRAULIC CIRCUIT DIAGRAM
(1) Hydraulic Circuit of ABS
The vehicle equipped only with the ABS controls the wheel’s braking force using three 3-
channel 4-sensor method. The front wheels that are the primary circuit of the brake system is
composed of two wheel speed sensors and two channel valves system with two inlet valves
and two outlet valves. The rear wheels that are the secondary circuit of the brake system is
composed of two wheel speed sensors, one inlet valve and one outlet valve. This system is
similar to the one from the previous model.

0-20
RODIUS 2005.07
4892-01
ABS SYSTEM
Pressure Decreases in the Circuit when ABS is Operating ▶
Pressure Increases in the Circuit when ABS is Operating ▶
Even when the hydraulic pressure on each circuit is stable, the wheel can be locked as the
wheel speed decreases. This is when the ABS ECU detects the wheel speed and the vehicle
speed and gives the optimized braking without locking the wheels. In order to prevent from
hydraulic pressure increases, the inlet valve is closed and the outlet valve is opened. Also, the
oil is sent to the low pressure changer and the wheel speed increases again. The ABS ECU
operates the pump to circulate the oil in the low pressure chamber to the master cylinder. This
may make the driver to feel the brake pedal vibration and some noises.
As the wheel speed increases, the inlet valve opens and the wheel’s pressure increases
due to the master cylinder pressure. The oil in the low pressure chamber circulates to the wheel
by the pump and the wheel speed decreases as the hydraulic pressure at wheel increases. This
operation continues repetitively until there are no signs that the ECU is locking the wheels.
When the ABS hydraulic pressure control takes place, there may be some vibration and noises
at the brake pedal.

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ABS SYSTEM
RODIUS 2005.07
4892-01
(3) COMPONENTS DESCRIPTION
HECU (Hydraulic & Electronic Control Unit) ▶
Motor Pump ▶
Valve Body ▶
HECU consists of motor pump (1), solenoid
valve (2) and ECU (3).
ECU connector has 47 pins and the numbe
r
of valves in valve body is 6 when equipped
with only ABS and 12 when equipped with
ESP system.
The motor is operated when ABS is
activated. The cam-shaped output shaft o
f
the motor enables the brake system to
receive and supply the brake fluid during the
motor operation.
The cam bushing is installed between
plungers and it draws and discharges the
brake fluid.

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RODIUS 2005.07
4892-01
ABS SYSTEM
Pumping
▶
ECU (Including Solenoid Valves ? ESP Equipped Model)
▶
ECU lower cover)
▶
When the cam pushes the left plunger
during motor operation, the system pressure
is generated in the left cylinder. At this time,
the right plunger is expanded by spring force
and the expanded volume of the right
cylinder draws the brake fluid.
HECU controls the hydraulic valves by
supplying or cutting off the voltage to
solenoid valves depending on the wheel
speed and other information from wheel
speed sensors.
The figure shown in left side is for ESP
ECU. There are two channels for front
wheels and one channel for rear wheels.
Each channel has one inlet and one outlet
valve, therefore,
there are six solenoid valves.
The electrical components are weak to
moisture. To protect ECU, GoreTex-based
plate is used at ECU lower cover. The vent
hall (arrow) allows air to ventilate but does
not allow moisture to penetrate.

0-7
WHEEL
RODIUS 2005.07
4710-09
2. TIRE’S ABNORMAL PHENOMENA
1) Standing Wave
2) Hydroplaning
During running the rotating tire repeats
deformation and restoring movement
generated in tread. But when the wheel
rotating speed reaches high, the next
deformation applied to tire before restoring
last deformation so the trembling wave
appears in the tread portion. The lower the
tire pressure the severe the trembling wave
appears during the high speed.
The condition of driving a vehicle fast on the
road surface covered with water can cause
tires to fail to rotate with a good contact on
the surface, so results in remaining them a
float. This is so-called hydroplaning. It
causes brake failure, lower tractive force
and losing the steering performance so it is
very vulnerable condition.

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STICS
RODIUS 2005.07
8710-01
6) Parking Brake Warning
The parking brake warning light comes on for approx. 4 seconds (T4) when turning the
ignition key from “OFF” to “ON” position regardless of the vehicle speed and parking
brake switch position.
The warning light comes on when the parking brake switch is turned on while the vehicle
speed is below 10 km/h (V1).
The warning light goes off when turning off the parking brake switch under step 2.
The warning light blinks and the chime buzzer in the ICM box sounds for 2.85 seconds and
stops for 1.5 seconds when the vehicle speed is over 10 km/h (V1) for more than 2 seconds
while the parking brake switch is turned on.
The warning light goes off and the chime buzzer stops when turning off the parking brake
switch under step 4.
The warning light comes on and the chime buzzer stops when the vehicle speed goes down
below 7 km/h (V2) under step 4.
This function is not available when the ignition key is turned to “OFF” position. 1.
2.
3.
4.
5.
6.
7.

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RODIUS 2005.07
8010-10
CLUSTER
2. DESCRIPTIONS OF INDICATOR DISPLAY
1. Immobilizer indicator
2. Glow indicator
3. Winter mode indicator
4. Left turn signal indicator
5. Auto shift indicator (for automatic transmission)
6. Right turn signal indicator
7. Harzard indicator*
8. Engine check warning light
9. Cruise control indicator*
10. 4WD CHECK warning light
11. 4WD HIGH indicator
12. 4WD LOW indicator
13. Brake warning light14. Battery charge warning light
15. Seat belt reminder
16. Low fuel level warning light
17. Heated glass indicator
18. Door open warning light
19. High beam indicator
20. Engine oil pressure warning light
21. Air bag warning light
22. Water separator warning light
23. ABS warning light
24. EBD warning light
25. ESP warning light