ABS SSANGYONG MUSSO 1998 Workshop User Guide

1F2-6 M161 ENGINE CONTROLS
DIAGNOSIS
SELF DIAGNOSIS SOCKET PIN NUMBERS AND DESCRIPTIONS
1 Ground
2 Ignition 1
3 Battery Power Supply (Fuse NO.17)
4 REKES :PIN 6
5 Engine Speed Signal :MSE PIN 60
6 TCCU(Part-time)
7 STICS(PIN 26)
8-
9-
10 Air Bag(PIN 20)
11 Remote Engine Start Unit(PIN 10)12 -
13 Brake System
(ABS 5.3:PIN 11, ABS/ABD 5.3:PIN 46)
14 MSE 3.62S/3.53S(ECU Data Output:PIN 58)
15 TOD(PIN 20)
1 6 Immobilizer
17 -
1 8 TCU(PIN 23)
19 -
2 0 K-LINE(ECS:PIN 23)

1F2-18 M161 ENGINE CONTROLS
Failure
codeItem
Þ 19.1
Checking method Test
stepRequirementSpecified
valuePossible cause
38 37115 - 125 W
· ·· ·
· CAN module
resistance in
ABS, ABD,
ASR control
unit· Cable
· ABS, ABD, ASR
control unit
· Ignition:OFF
- disconnect the
coupling"No.1"
from ECU
Þ 19.2
38 37115 - 125 W
· ·· ·
· CAN module
resistance in
ECU control
unit· ECU· Ignition:OFF
- disconnect the
coupling"No.1"
from ECU
Þ 20.0
55811 - 14 V· ·· ·
· Diagnosis
cable
operating· ECU
· Cable
· Ignition:ON

1F2-44 M161 ENGINE CONTROLS
Removal & Installation Procedure
· ·· ·
·When removing the ECU only
1. Turn the ignition switch to "OFF" position.
2. Disconnect the negative battery cable.
3. Disconnect the couplings from ECU.
4. Unscrew the left and right bolt (3) on bolt (1) and auxiliarly
bracket and remove the auxiliarly bracket from the bracket
assembly (2).
Installation Notice
5. Unscrew the four bolts (5) and disconnect the ECU (6) from
the bracket assenbly.
Installation Notice
6. Installation should follow the removal procedure in the
reverse order.
Tightening Torque6 - 8 Nm
5 - 7 Nm(1)
(3)
Tightening Torque 5 - 7 Nm
8. Unscrew the bolts (5) and disconnect the ECU (6) from the
bracket assenbly.
Installation Notice · ·· ·
·When Removing the ECU with ABS or ABS/ASR Unit
1. Turn the ignition switch to "OFF" position.
2. Disconnect the negative battery cable.
3. Disconnect the couplings from ECU.
4. Disconnect the coupling from ABS or ABS/ASR unit.
5. Unscrew the bolt (1) and the left and right flange nuts.
6. Remove the ECU with ABS or ABS/ASR unit assembly.
7. Unscrew the left and right bolt (3) on the auxiliary bracket
and remove the auxiliary bracket from the bracket assembly.
Installation Notice
Tightening Torque 6 - 8 Nm
Tightening Torque 5 - 7 Nm
Tightening Torque 5 - 7 Nm
9. Installation should follow the removal procedure in the
reverse order.

1F2-62 M161 ENGINE CONTROLS
PURGE SWITCHOVER VALVE
1 Purge Control valve
2 Line to engine
3 Line to canister
4 Canister
Functions
The fuel vaporization control system is installed to inhibit the
fuel vaporized gas from discharging into the atmosphere. The
fuel vaporized gas that is accumulated in the canister abstracts
through the purge switchover valve purification during the
engine combustion (except the decreasing mode) and coolant
temperature of over 80°C. For this reason, the ECU transacts
the engine speed, air inflow quantity, coolant temperature, and
intake temperature.
The purge switchover valve is activated by the ECU frequency
according with the engine rotating speed to adjust the
purification rate. The purification rate is determined by the
continuous valve opening interval.
The purge switchover valve is activated by the ECU for the
following conditions :
lCoolant temperature of over 80°C
lEngine speed of over 1000rpm
l2 Minutes after starting
lWhen the fuel cut-off mode is not activated

SECTION 2A
SUSPENSION DIAGNOSIS
TABLE OF CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 2A-1
General Specifications . . . . . . . . . . . . . . . . . . 2A-1
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 2A-3
General Diagnosis . . . . . . . . . . . . . . . . . . . . . 2A-3
Input & Output Devices and Damping
Force Control Logic . . . . . . . . . . . . . . . . . 2A-5
Input & Output Devices . . . . . . . . . . . . . . . . . . 2A-5
System Layout . . . . . . . . . . . . . . . . . . . . . . . . 2A-5Damping Force Control Logic . . . . . . . . . . . . . 2A-6
Normal Control . . . . . . . . . . . . . . . . . . . . . . . . 2A-6
Self-Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . 2A-7
Actuator Inspection . . . . . . . . . . . . . . . . . . . . . 2A-8
Schematic and Routing Diagrams . . . . . . . . 2A-9
ECS Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2A-9
Self Diagnosis Test . . . . . . . . . . . . . . . . . . 2A-12
Diagnosis Test . . . . . . . . . . . . . . . . . . . . . . . 2A-12
SPECIFICATIONS
GENERAL SPECIFICATIONS
188
ApplicationFront
3-stage Variable Damping Force Control TypeRear
ECS Control Type
344 - 350Shock
Absorber517 - 523Max. Length (mm)
245 ± 3Compressed Length (mm)
102Stroke (mm)
331 ± 3

SUSPENSION DIAGNOSIS 2A-3
DIAGNOSIS
GENERAL DIAGNOSIS
Checks
Loosened Mountings
Damaged or Worn wheel Bearing
Damaged Shock Absorber
Damaged TireAction
Retightening
Replace
Replace
Replace
Abnormal Noises
Checks
Broken Stabilizer Bar
Faulty Shock AbsorberAction
Replace
Replace
Vehicle Rolling
Checks
Over Inflated Tire
Faulty Shock Absorber
Loosened wheel Nut
Bent or Broken Coil Spring
Damaged Tire
Worn BushingAction
Pressure Adjustment
Replace
Tighten as Specified
Replace
Replace
Replace
Poor Riding
Problems in the steering, the suspension, the tires, and
the wheels involve several systems. Consider all systems
when you diagnose a complaint. Some problems, such
as abnormal or excessive tire wear and scuffed tires,
may by the result of hard driving. Always road test thevehicle first. If possible, do this road test with the
customer.
Proceed with the following preliminary checks. Correct
any substandard conditions.
Checks
Incorrect Wheel Alignment
Excessive Resistance of Lower Arm Ball Joint
Insufficient Tire Pressure
Faulty Power Steering
Action
Repair
Replace
Adjust
Repair or Replace
Hard Steering
Checks
Deformed Arm Assembly
Worn Bushing
Bent or Broken Coil Spring
Difference Between L/H & R/H HeightsAction
Replace
Replace
Replace
Adjust
Vehicle Pulls to Right or Left

SUSPENSION DIAGNOSIS 2A-5
INPUT & OUTPUT DEVICES AND DAMPING FORCE
CONTROL 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

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 influences
directional 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 the
tires 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 safe
steering and suspension systems. Each component
must be strong enough to withstand and absorb extreme
punishment. 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 effort
and the road friction be held to a negligible force in order
to 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 and
performance 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 rolling
forward. The specified toe angle is the setting which
achieves 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 and
suspension 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 CONTENTS
SPECIFICATIONS
GENERAL SPECIFICATIONS
Type
Spring Type
Torsion Bar
Shock Absorber
Stabilizer TypeDouble Wishbone
Torsion Bar Spring
1,040 mm
24.5 mm
Cylindrical Reciprocation Type
Torsion Bar Spring
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 2C-1
General 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
ApplicationDescription 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(
f)

FRONT SUSPENSION 2C-3
COMPONENT LOCATOR
FRONT SUSPENSION
1 Shock Absorber
2 Upper Arm
3 Steering Knuckle
4 Lower Arm5 Stabilizer Bar Link
6 Stabilizer Bar
7 Suspension Bumper