2003 SSANGYONG MUSSO axle

SUSPENSION DIAGNOSIS 2A-5
INPUT & OUTPUT DEVICES AND DAMPING FORCECONTROL LOGIC
INPUT & OUTPUT DEVICES Damping force of shock absorber will rotate shock absorber control rod in 3 modes by driving actuator on the upper shock absorber when signaled from ECS. Rotary valve in the shock absorber will control hydraulic flow according to rotation of control rod to adjust damping force of shock absorber in SOFT MEDIUM HARD.
SYSTEM LAYOUT
1 ECS (ECU)
2 Body Vertical Acceleration Sensor (Vertical Sensor)
3 Body Lateral Acceleration Sensor (Lateral
Sensor)
Speed Sensor
Axle Vertical Acceleration Sensor (Wheel G Sensor)
Stop Lamp Switch
Body Vertical Acceleration Sensor (Vertical Sensor)
ECS Switch
Indicator Lamp
Actuator
Shock Absorber
Self-Diagnosis Connector
Damping Force Adjustment
ECS
(ECU)
Body Lateral Acceleration Sensor (Lateral Sensor)
4 ECS Mode Switch
5 Stop Lamp Switch
6 Axle Vertical Acceleration Sensor (Wheel G
Sensor)
7 Mode Actuator

2A-6 SUSPENSION DIAGNOSIS DAMPING FORCE CONTROL LOGIC Control Logic that applies on damping force variable suspension is comprised of road sensing driving comfort control logic to increase driving comfort and vehicle speed sensing control logic, anti-roll control logic and anti-dive control
logic to secure control safety.
LogicSensor
Road Sensing Driving Comfort Control LogicSpeedVertical
Sensor (2.5g)Lateral
Sensor (1g)Axle
Acceleration
Sensor (10g) Brake
Anti-bounce Control Logic Anti-roll Control LogicAnti-dive Control Logic
Vehicle Speed Sensing Control Logic
NORMAL CONTROL Initial Stage When ignition switch is "ON", system initialization will be performed for approx. 3 seconds. During this time, warning lamp will stay ON and damping force will be switched to Hard status. After 3 seconds, warning lamp will turn off and normal control status will be restored. Normal Damping Force Control Establishment Damping force will have Soft Medium Hard status in AUTO mode and Medium Hard status in SPORT mode.
When double control items are satisfied at the same time it will be Hard Medium Soft in order.
Normal Damping Force Control Release Control mode release will be "Hard Medium Soft"or "Medium Soft". In case that returned from Hard status to
Medium status during control, it will be done after elapse of setting times. Returning from Medium status to Soft status
will be done immediately without delay.

SUSPENSION DIAGNOSIS 2A-7
SELF-DIAGNOSIS ECS-ECU indicates ECS circuit defectives to the driver by flickering ECS indicator lamp in the meter cluster 0.5 second of interval if there are defectives.
Code
Body verticalacceleration
sensor
Defects
When sensor outputvoltage is less than
0.5-4.5V, more than
4.5V.
Judging Conditions01
0.9 - 1.1sec.Set TimeSensor Voltage
2.0 ± 0.1V
3.0 ± 0.1V
Release Conditions
0.9 - 1.1sec.
Set Time
Body lateral
acceleration sensor When sensor output
voltage is less than
0.55±0.15V, more than
4.45±0.1V.
02
0.9 - 1.1sec.Sensor Voltage
2.0 ± 0.1V
3.0 ± 0.1V 0.9 - 1.1sec.
Stop anti-
bounce ride
control
Remedy
Stop anti-roll control
Axle vertical
acceleration
sensor (wheel G sensor) When sensor output
voltage is less than
0.5-4.5V, more than
4.5V.
03
0.9 - 1.1sec.Sensor Voltage
2.0 ± 0.1V
3.0 ± 0.1V 0.9 - 1.1sec.
Stop ride
control
Front actuator Check step motor
power supply detecting
circuit for open and
short.
check for relative connectors.
04
0.4 - 0.6sec.IGN+ SW.
OFF
ON
Stop control
after returning to the previ-
ous mode
Rear actuator When defective detect- ing circuit has detected
defectives during
output OFF.
05
0.4 - 0.6sec.IGN+ SW.
OFF
ON
Stop control
after returning
to the previous
mode
ECU When ECU does not
work normally.
06
0.4 - 0.6sec.Reset
Stop control
1. Turn the ignition switch ON and if ECS system is normal, ECS indicator lamp will turn on for 3 seconds and then go off. However if defective, ECS indicator lamp will flicker in the interval of 0.5 second continuously.
2. Identify fault code with Scanner.

WHEEL ALIGNMENT 2B-5
VIBRATION DIAGNOSIS Wheel imbalance causes most highway speed vibration problems. A vibration can remain after dynamicbalancing because:
A tire is out of round.
A rim is out of round.
A tire stiffness variation exists.
Measuring tire and wheel free runout will uncover only part of the problem, All three causes, known as loadedradial runout, must be checked using method of substituting known good tire and wheel assemblies on the problem vehicle. Preliminary Checks Prior to performing any work, always road test the car and perform a careful visual inspection for:

Obvious tire and wheel runout.
Obvious drive axle runout.
Improper tire inflation.
Incorrect trim height.
Bent or damaged wheels.
Debris build-up on the tire or the wheel.
Irregular or excessive tire wear.
Improper tire bead seating on the rim,
Imperfections in the tires, including: tread deformations, separations, or bulges from impactdamage. Slight sidewall indentations are normal and
will not affect ride quality.
Tire Balancing Balance is the easiest procedure to perform and should be done first if the vibration occurs at high speeds. Do an off-vehicle, two-plane dynamic balance first to correct
any imbalance in the tire and wheel assembly. An on-vehicle finish balance will correct any brake drum,
rotor, or wheel cover imbalance, If balancing does not correct the high-speed vibration, or if the vibration occurs at low speeds, runout is the probable cause.

SECTION 2C
FRONT SUSPENSION
TABLE OF CONTENTSSPECIFICATIONS
GENERAL SPECIFICATIONS
Type
Spring Type
Torsion Bar Shock Absorber
Stabilizer Type
Double Wishbone
Torsion Bar Spring 1,040 mm
24.5 mm
Cylindrical Reciprocation Type
Torsion Bar Spring
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 2C-1General Specifications . . . . . . . . . . . . . . . . . . 2C-1
Fastener Tightening Specifications . . . . . . . . . 2C-2
Component Locator . . . . . . . . . . . . . . . . . . . 2C-3
Front Suspension . . . . . . . . . . . . . . . . . . . . . . 2C-3
Maintenance and Repair . . . . . . . . . . . . . . . 2C-4
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . 2C-4
Front Stabilizer Bar . . . . . . . . . . . . . . . . . . . . . 2C-4
Application Description
Torsion Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . 2C-6
Front Lower and Upper Arm . . . . . . . . . . . . . . 2C-8
Front Shock Absorber . . . . . . . . . . . . . . . . .
2C-10
Axle Vertical Acceleration Sensor (Wheel G Sensor) . . . . . . . . . . . . . . . . . . . 2C-12
Vertical and Lateral Sensor . . . . . . . . . . . . . . 2C-13
ECS (ECU) . . . . . . . . . . . . . . . . . . . . . . . . . . 2C-14
Length Outer Diameter(
)

2C-12 FRONT SUSPENSION
1 Axle Vertical Acceleration Sensor (wheel Gsensor)
Removal & Installation Procedure
1. Disconnect extension wiring connector (2) from the axle vertical acceleration sensor. Notice Installation of wiring connector should be as shown in the right drawing.
2. Unscrew bolts (3) and remove the axle vertical acceleration sensor (1). Notice When installing the sensor to the bracket, the sensor wiring should be upward.
3. Installation should follow the removal procedure in the reverse order. 1 Actuator Connector
2 Axle Vertical Acceleration Sensor Connector
3 Front Hose Mounting Bracket
4 Frame Side Member
AXLE VERTICAL ACCELERATION SENSOR (WHEEL G SENSOR)2 Extension Wiring
3 Bolt (M6)
............................................. 20 - 30Nm

2D-2 REAR SUSPENSIONDIAGNOSIS
NOISE (DURING STRAIGHT DRIVING)
Check
Lack of Oil
Low Viscosity of Oil Insufficient Oil Excessive Backlash of Ring Gear
Worn or Damaged Tooth of Ring and Pinion GearWorn or Damaged Drive Pinion BearingWorn Spline of Side Bearing and Side Gear Bent Axle Housing Bent Differential CaseWorn Pinion ShaftIncorrect Drive Pinion PreloadIncorrect Contact of Ring Gear and Pinion Action
Replenish ReplaceReplace Adjust
ReplaceReplace Replace ReplaceReplaceReplace Adjust
Retightening
NOISE (DURING TURNING)
Check
Worn or Damaged Tooth of Pinion or Side Gear Worn Pinion ShaftExcessive Backlash of Pinion Gear and Side Gear Excessive End-play of Rear Axle Shaft Incorrect Contact of Side Gear and Differential CaseAxle Housing CrackBent or Poor Installation of Drive Pinion Oil Seal
Damaged or Torn Drive Pinion Oil Seal Loosened Bearing Collar Worn or Damaged Universal JointWorn of Damaged Axle Shaft Bearing Action
ReplaceReplaceReplace Adjust
ReplaceReplaceReplaceReplace Replace ReplaceReplace
OIL LEAKAGE
Check
Excessive Oil Faulty Seal of Carrier Contact Surface Axle Housing Crack Worn or Damaged Oil Seal Action
Adjust
Repair
ReplaceReplace

2D-6 REAR SUSPENSION Removal & Installation Procedure
Stabilizer bar
1. Remove the upper nut of the connecting link.
Installation Notice
2. Remove the stabilizer bar cap fixing bolts (arrow) andremove the stabilizer bar. Installation Notice
Tightening Torque 16 - 22 Nm
Distance Between the Nutend and the Screw end 10 - 13 mm
Tightening Torque 30 - 45 Nm
Lateral Rod
1. Remove the lateral rod fixing nut from the frame.
Notice Completely press the coil springs. Installation Notice
2. Remove the lateral rod fixing nut from the rear axle and remove the lateral rod. Installation Notice
Tightening Torque 150 - 180 Nm
Tightening Torque 150 - 180 Nm