suspension SSANGYONG MUSSO 2003 User Guide

2A-8 SUSPENSION DIAGNOSIS-
ACTUATOR INSPECTION Output position of the actuator should be changed as below when battery voltage is applied between actuator connector terminals.
Connector
terminal Battery Voltage
Position of The Actuator Output Remark
1 (White)
-
2 (Black)
OPEN
3 (Red) +
1 (White) +
2 (Black) -
3 (Red)
OPEN
1 (White) OPEN
2 (Black) +
3 (Red) SOFT Mode
MEDIUM Mode
HARD Mode

SUSPENSION DIAGNOSIS 2A-9
ECS CIRCUIT
SCHEMATIC AND ROUTING DIAGRAMS

2A-10 SUSPENSION DIAGNOSIS

SUSPENSION DIAGNOSIS 2A-11
Connector Pin Number and Circuits
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
26
Ignition
Actuator R-MEDIUM Actuator R-SOFT
Actuator F-HEAD Select Switch
Speed Sensor
Wheel G Sensor
Wheel G Sensor Ground
-
Vertical G Sensor
Sensor +5V
Chassis Ground Indicator Lamp
NO. CircuitNO. Circuit
1 14
21 5
316
417
518
619
720
821
922
10 23
11 2 4
12 25
13 26 Chassis Ground
Actuator R-HEAD
Actuator F-MEDIUM
Actuator F-SOFT Brake Switch
-
Lateral G Sensor
Lateral G Sensor Ground
Vertical G Sensor Ground Diagnosis K Line
Diagnosis L Line - -

2A-12 SUSPENSION DIAGNOSISSELF DIAGNOSIS TEST
DIAGNOSIS TEST
Special Tool Requirements : Scanner
1. Position the ignition switch to 'OFF'.
2. Connect Scanner harness connector to the engine compartment diagnosis socket.
3. Turn the ignition switch to 'ON' position.
4. Select "Electronic control vehicle diagnosis" from function selection display and press "Enter".
5. Select "Musso ('98 model year)" from vehicle model selection display and press 'Enter'.
6. Select "Electronic suspension system (ECS)" from control system selection display and press 'Enter'.
7. Select "Self-diagnosis" from diagnosis item selection display.
Notice
Check sensor value output display, if necessary.
8. Determine the fault code and check defective component. NoticeRefer to self-diagnosis list.

SUSPENSION DIAGNOSIS 2A-13
Self - Diagnosis List
Fault
CodeDefects Service Hint
01 Vertical Acceleration Sensor
02 Lateral Acceleration Sensor
03 Wheel Acceleration Sensor
04
05 Rear Step Motor
0 6 ECU Front Step Motor 1. Check sensor supply voltage
Condition - IGN ON
Standard value - voltage between pin 11 and 8 of ECU : 4.5 - 5.0V
2. Check sensor output voltage Condition - IGN ON
Standard value - voltage between pin 20 and 11 of ECU: 0.5 - 4.5V
3. Check the sensor.
4. Check circuit for open.
5. Check connection of other connectors.
1. Check sensor supply voltage Condition - IGN ON
Standard value - voltage between pin 11 and 8 of ECU : 4.5 - 5.0V
2. Check sensor output voltage Condition - IGN ON
Standard value - voltage between pin 10 and 11 of ECU : 0.5 - 4.5V
3. Check the sensor.
4. Check circuit for open.
5. Check connection of other connectors.
1. Check step motor supply voltage.
2. Check circuit for open.
3. Check connection of other connectors.
1. Check step motor supply voltage.
2. Check circuit for open.
3. Check connection of other connectors.
1. Check connectors of ECU.
2. Replace the ECU.
1. Check sensor supply voltage
Condition - IGN ON
Standard value - voltage between pin 11, 8 and pin
7,11 of ECU : 4.5 - 5.0V
2. Check sensor output voltage
3. Check the sensor.
4. Check circuit for open.
5. Check connection of other connectors.

WHEEL ALIGNMENT 2B-9
GENERAL DESCRIPTION AND SYSTEM OPERATION
FOUR WHEEL ALIGNMENT CASTER Caster is the tilting 91 the uppermost point of the steering axis either forward or backward from the vertical when viewed from the side of the vehicle. A backward tilt is positive, and a forward tilt is negative. Caster influencesdirectional control of the steering but does not affect
tire wear. Weak springs or overloading a vehicle will affect
caster. One wheel with more positive caster will pull
toward the center of the car. This condition will cause the car to move or lean toward the side with the least
amount of positive caster. Caster is measured in degrees. CAMBER Camber is the tilting of the top of the tire from the vertical when viewed from the front of the vehicle. When thetires tilt outward, the camber is positive. When the tires tilt inward, the camber is negative. The camber angle is measured in degrees from the vertical. Camber
influences both directional control and tire wear.
If the vehicle has too much positive camber, the outside
shoulder of the tire will wear. If the vehicle has too much
negative camber, the inside shoulder of the tire will wear.
The first responsibility of engineering is to design safesteering and suspension systems. Each componentmust be strong enough to withstand and absorb extremepunishment. Both the steering system and the front and the rear suspension must function geometrically with thebody mass. The steering and the suspension systems require that the front wheels self-return and that the tire rolling effortand the road friction be held to a negligible force in orderto allow the customer to direct the vehicle with the least effort and the most comfort. A complete wheel alignment check should include
measurements of the rear toe and camber. Four-wheel alignment assures that all four wheels will be running in precisely the same direction. When the vehicle is geometrically aligned, fuel economy and tire life are at their peak, and steering andperformance are maximized. TOE
Toe-in is the turning in of the tires, while toe-out is the turning out of the tires from the geometric centerline or thrust line. The toe ensures parallel rolling of the wheels. The toe serves to offset the small deflections of the wheel support system which occur when the vehicle is rollingforward. The specified toe angle is the setting whichachieves 0 degrees of toe when the vehicle is moving. Incorrect toe-in or toe-out will cause tire wear and
reduced fuel economy. As the individual steering andsuspension components wear from vehicle mileage,
additional toe will be needed to compensate for the wear. Always correct the toe dimension last.

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-2 FRONT SUSPENSIONApplication
Torque Arm Bolt N
m
40 - 60 60 - 80
FASTENER TIGHTENING SPECIFICATIONS
Stabilizer Bar
Application
Stabilizer Bar Retaining Nut Stabilizer Bar Link NutLower Arm Nut N
m
30 - 45 60 - 80 16 - 22
Torsion Bar
Lower and Upper Arm
Application
Upper Arm Nut Upper Arm End Castle NutLower Arm Nut Lower Arm End Castle Nut N
m
120 - 140 80 - 150
150 - 180 120 - 180
Steering Knuckle and Drive Shaft
Application
Brake Caliper Hose Bolt Brake Caliper Mounting Bolt
Tie Rod Retaining Nut Upper Arm Retaining NutLower Arm Retaining Nut N
m
25 - 35
85 - 105 35 - 45
80 - 150
120 - 180
M10 M12

FRONT SUSPENSION 2C-3
COMPONENT LOCATOR
FRONT SUSPENSION
1 Shock Absorber
2 Upper Arm
3 Steering Knuckle
4 Lower Arm
5 Stabilizer Bar Link
6 Stabilizer Bar
7 Suspension Bumper