1998 SSANGYONG MUSSO Workshop Repair Manual

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
215
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 DIAGNOSIS
SELF 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.
Notice
Refer to self-diagnosis list.

SUSPENSION DIAGNOSIS 2A-13
Self - Diagnosis List
Fault
CodeDefectsService Hint
01 Vertical Acceleration Sensor
02 Lateral Acceleration Sensor
03 Wheel Acceleration Sensor
04
05 Rear Step Motor
0 6 ECUFront Step Motor1. Check sensor supply voltage
lCondition - IGN ON
lStandard value - voltage between pin 11 and 8 of ECU :
4.5 - 5.0V
2. Check sensor output voltage
lCondition - IGN ON
lStandard 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
lCondition - IGN ON
lStandard value - voltage between pin 11 and 8 of ECU :
4.5 - 5.0V
2. Check sensor output voltage
lCondition - IGN ON
lStandard 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
lCondition - IGN ON
lStandard 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.

SECTION 2B
WHEEL ALIGNMENT
TABLE OF CONTENTS
SPECIFICATIONS
WHEEL ALIGNMENT SPECIFICATIONS
Application
Camber
Caster
Toe-in
King Pin InclinationDescription
0° ± 30'
2°30' ± 30'
0 - 4 mm
12°30'
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 2B-1
Wheel Alignment Specifications . . . . . . . . . . . 2B-1
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 2B-2
Tire Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . 2B-2
Radial Tire Lead/Pull . . . . . . . . . . . . . . . . . . . 2B-3
Vibration Diagnosis . . . . . . . . . . . . . . . . . . . . . 2B-5
Maintenance and Repair . . . . . . . . . . . . . . . 2B-6
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . . 2B-6Wheel Alignment . . . . . . . . . . . . . . . . . . . . . . . 2B-6
General Description and System
Operation . . . . . . . . . . . . . . . . . . . . . . . . . 2B-9
Four Wheel Alignment . . . . . . . . . . . . . . . . . . 2B-9
Toe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2B-9
Caster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2B-9
Camber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2B-9

2B-2 WHEEL ALIGNMENT
DIAGNOSIS
TIRE DIAGNOSIS
Irregular and Premature Wear
Irregular and premature tire wear has many causes.
Some of them are incorrect inflation pressures, lack of
regular rotation, poor driving habits, or improper wheel
alignment.
Rotate the tires if :
lThe front tire wear is different from the rear.
lThe left and right front tire wear is unequal.
lThe left and right rear tire wear is unequal, Check
wheel alignment if :
lThe left and right front tire wear is unequal.
lThe wear is uneven across the tread of either front
tire.
lThe front tire treads are scuffed with “feather” edges
on the side of the tread ribs or blocks.
Tread Wear Indicators
The original equipment tires have built-in tread wear
indicators to show when the tires need replacement.
These indicators appear as bands when the tire tread
depth becomes shallow. Tire replacement is
recommended when the indicators appear in three or
more grooves at six locations.
Radial Tire Waddle
Waddle is side-to-side movement at the front or rear of
the vehicle. It is caused by the steel belt not being straight
within the tire, or by excessive lateral runout of the tire
or wheel.
The vehicle must be road tested to determine which end
of the vehicle has the faulty tire. The rear end of the
vehicle will shake from side to side or “waddle” if the
waddle tire is on the rear of the vehicle. From the driver’s
seat, it feels as though someone is pushing on the side
of the vehicle. If the faulty tire is on the front of the vehicle,
the waddle is more visual. The front sheet meld appears
to be moving back and forth, and the drivers seat feels
like the pivot point in the vehicle.
Waddle can be diagnosed using the method of
substituting known good tire and wheel assemblies on
the problem vehicle
1. Road test the vehicle to determine if the waddle is
coming from the front or the rear of the vehicle.
2. Install good tires and wheels from a similar vehicle in
place of those on the offending end of the problem
vehicle. If the source of the waddle is not obvious,
change the rear tires.

WHEEL ALIGNMENT 2B-3
3. Road test the vehicle. If there is improvement, install
the original tires to find the offending tire. If there is
no a straight improvement, install good tires in place
of all four offending tires.
4. Install original tires one at a time to find the offending
tire.
RADIAL TIRE LEAD/PULL
Lead/pull is the deviation of the vehicle from a straight
path on a level road with no pressure on the steering
wheel. Lead is usually caused by:
lIncorrect alignment.
lUneven brake adjustment.
lTire construction.
The way in which a tire is built can produce lead/pull in
the vehicle.011-center belts on radial tires can cause
the tire to develop a side force while the vehicle rolls
straight down the road. If one side of the tire has even a
little larger diameter than the diameter of the other side,
the tire will tend to roll to one side. Unequal diameters
will cause the tire to develop a side force which can
produce vehicle lead/pull.
The radial lead/pull diagnosis chart should be used to
determine whether the problem originates from an
alignment problem or from the tires. Part of the lead
diagnosis procedure calls for tire rotation that is different
from the proper tire rotation pattern. If a medium- to high-
mileage tire is moved to the other side of the vehicle, be
sure to check for ride roughness. Rear tires will not cause
lead/pull.

2B-4 WHEEL ALIGNMENT
1. Perform wheel alignment preliminary inspection.
2. Check the brakes for dragging.
3. Road test the vehicle.
Does the vehicle lead/pull?
1. Cross switch the front tire and wheel assemblies.
2. Road test the vehicle.
Does the vehicle lead/pull?
1. Check the front wheel alignment.
Is the alignment within specifications?
1. Compare the front camber and front caster to
specifications.
Are they within specifications?
1. Check the vehicle frame.
Is the frame bent?
1. Straighten the frame.
Is the repair complete?
1. The probable cause is the tires.
2. Switch the left front tire and wheel assembly with
the left rear tire and wheel assembly.
3. Road test the vehicle.
Does the vehicle still lead/pull?
1. Switch the left front tire and wheel assembly with
the left rear tire and wheel assembly and replace the
left front tire.
Does the repair complete?
1. Switch the right front tire and wheel assembly with
the right rear tire and wheel assembly.
2. Road test the vehicle.
Does the vehicle still lead/pull?
1. Switch the right front tire and wheel assembly with
the right rear tire and wheel assembly and replace
the right front tire.
Is the repair complete?Action
Radial Tire Lead/Pull Diagnosis Chart
Step
1Values(s)
-Yes
Go to
Step 2
Go to Step 3
Go to Step 4
Go to Step 7
Go to Step 6
Go to Step 3
Go to Step 9
System OK
Go to
Step 1
System OKNo
System OK
System OK
Adjust
alignment
Go to
Step 5
Go to Step 1
-
Go to
Step 8
Go to Step 1
Go to Step 10
Go to Step 1
2
3
4
5
6
7
8
9
10-
-
-
-
-
-
-
-
-