SSANGYONG MUSSO 1998 Workshop Repair Manual

SECTION 8A
SEAT BELTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 8A-1
Fastener Tightening Specifications . . . . . . . . . 8A-1
Component Locator . . . . . . . . . . . . . . . . . . . 8A-2
Front Seat Belt . . . . . . . . . . . . . . . . . . . . . . . . 8A-2
Rear Seat Belt . . . . . . . . . . . . . . . . . . . . . . . . 8A-3
TABLE OF CONTENTS
Caution: Disconnect the negative battery cable before removing or installing any electrical unit or when a
tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable
will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise
noted.
General Description and System
Operation . . . . . . . . . . . . . . . . . . . . . . . . . 8A-4
Driver Seat Belt Warning . . . . . . . . . . . . . . . . 8A-4
Operation and Functional Checks . . . . . . . . . 8A-4
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
Application
Anchor BoltNlm
35 - 55

8A-2 SEAT BELT
COMPONENT LOCATOR
FRONT SEAT BELT
1 Seat Belt Assembly (3-Point)
2 Buckle Assembly
3 Seat Belt Dust Cover
4 Seat Belt Webbing Guide5 Seat Belt Reel Assembly
6 Anchor Bolt..........................................35-55 Nm
7 Anchor Bolt..........................................35-55 Nm
8 Anchor Bolt..........................................35-55 Nm

SEAT BELTS 8A-3
REAR SEAT BELT
1 Seat Belt Assembly (3-point)
2 Seat Belt Stalk Plate Assembly
3 Seat Belt Assembly (2-Point)
4 Webbing Buckle Assembly (Center)5 Webbing Buckle Assembly (Rear)
6 Webbing Hanger
7 Seat Belt Dust Cover
8 Webbing Guide

8A-4 SEAT BELT
GENERAL DESCRIPTION
AND SYSTEM OPERATION
DRIVER SEAT BELT WARNING
The driver's safety belt incorporates a safety belt reminder
light in the instment cluster remind the driver if the safety belt
is not fastened when the ignition is turnd ON.
OPERATION AND FUNCTIONAL
CHECKS
Caution:
lKeep sharp objects and potentially damaging objects
away from the seat belts.
lAvoid bending or damaging any portion of the buckle
or the latch plate.
lDo not bleach or dye the belt webbing. Use only mild
soap and water in order to clean the belts.
lWhen installing the seat belt anchor bolts and the
screws, start the bolts and screws by hand in order
to prevent crossthreading.
lDo not attempt any repairs on the retractor
mechsemblies with new assemblies.
lReplace any belts that are cut r damaged in any way.
1. Inspect all saet belt anchor bolts and the screw in order to
verify that they are secure.
2. Inspect the seat belt buckle. The buckle must lock and
unlock easily.
3. After inserting the latch into the buckle, tug sharply on the
belt. The buckle must remain locked.
4. Fully extend the shoulder belt portion to make sure that
there is no twisting or tears in the belt.
5. Let the shoulder belt retract fully. The belt should retract
easily.

SECTION 8B
SUPPLEMENTAL RESTRAINT SYSTEM(SRS)
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 8B-1
General Specifications . . . . . . . . . . . . . . . . . . 8B-1
Schematic and Routing Diagrams . . . . . . . . 8B-2
Air Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-2
Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-3
Function Description . . . . . . . . . . . . . . . . . . 8B-4
Air Bag Module . . . . . . . . . . . . . . . . . . . . . . . . 8B-6
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-7
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-7
Self Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . 8B-10
Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . 8B-16
TABLE OF CONTENTS
Caution: Disconnect the negative battery cable before removing or installing any electrical unit or when a
tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable
will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise
noted.
SPECIFICATIONS
GENERAL SPECIFICATIONS
Application
Air bag System Deployment Time
Detection Time
Operating Temperature
Storage Temperature
Air Bag Replacement Interval
Voltage Range
Current Consumption
Acceleration Range
Max. Acceleration
Voltage Ramp
Energy Reservation
Inflator Ignition Energy
Squib Resistance
Air Bag Warning Lamp ON Time (When Ignition ON)Description
< 20ms
< 5ms
-40°C ~ +85°C
-40°C ~ +90°C
Every 10-year after installation
9-16V
5ms after ignition switch ON < 1A,
5ms ~ 5sec. <300mA, after 5sec. < 100mA
+/-50g
+/-600g pulse
0.5 ~ 2.0 V/s
150ms after battery disconnection
4.3mJ
2.15 ± 0.35 W
6 sec.
Air Bag Diagram . . . . . . . . . . . . . . . . . . . . . . 8B-17
Maintenance and Repair . . . . . . . . . . . . . . 8B-18
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . 8B-18
Air Bag Module . . . . . . . . . . . . . . . . . . . . . . . 8B-18
Clock Spring . . . . . . . . . . . . . . . . . . . . . . . . . 8B-19
Air Bag Control Unit (AC4) . . . . . . . . . . . . . . 8B-21
General Description and System
Operation . . . . . . . . . . . . . . . . . . . . . . . . 8B-22
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-22
Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-22

8B-2 SUPPLEMENTAL RESTRAINT SYSTEM(SRS)
SCHEMATIC AND ROUTING DIAGRAMS
AIR BAG

SUPPLEMENTAL RESTRAINT SYSTEM(SRS) 8B-3
CAUTIONS
Failure to follow the correct service procedure can cause air bag damage or personal injury due to unexpected air
bag deployment. Before service (removal and installation of part, check for replacement), please be weal noticed of
following items for your correct service.
1. For service, turn the ignition switch to ‘LOCK’ position and wait for 30 seconds after disconnecting the negative
battery cable.
2. If the vehicle collapsed, remove the air bag ECU first to reserve the crash records.
3, Never use other vehicles’ air bag components and replace with specified new part.
4. Never disassemble or repair the air bag module, air bag unit and wiring harness to re-use.
5. Replace the air bag module and air bag unit with new if it dropped, cracked or damaged.
6. Only qualified technicians in service shop should check or repair the air bag,
7. Before service, should be well noticed of warning labels on the vehicle.
A. Sun Visor Side
[Warning]
Pull down the sun visor and see SRS air bag
warning lamp on the head lining.
B. Head Lining
[Warning]
1 . This vehicle is equipped with air bag. Air bag is
supplemental device for the seatbelt. Fasten
your seatbelt.
2. This air bag should be replaced by authorized
supplier within replacement intervals.
3. When the ignition key is turned to ON position,
SRS warning lamp will turn on for 6 sec. and go
off. In this case, the system is normal.
For the following cases, see service manual.
- SRS warning lamp does not turn on.
- SRS warning lamp does not go off.
- SRS warning lamp continues to blink.
C. Steering Wheel Body Inner
[Warning]
Before removing the steering wheel, read service
manual first. Set the front wheels straight forward
and align the center position marks of SRS clock
spring. Improper removal or installation of the
steering wheel can damage the SRS components.D. Engine Compartment
[Warning]
This vehicle is equipped with air bag. Before
checking the engine compartment, read service
manual first. Faultuy check and service can cause
SRS air bag deployment and system defects that
can be led to severe damage.
E. Battery Cable
[Warning]
Before disconnecting the battery power, read
service manual first.

8B-4 SUPPLEMENTAL RESTRAINT SYSTEM(SRS)
FUNCTION DESCRIPTION
Air Bag Control Unit (AC4)
Air bag control unit (AC4) is installed on the center portion of
the front floor tunnel.
It is a central control unit that control all functions and determines
whether deploy the air bag or not with the collision signal from
the built-in accelerometer sensor and has function of diagnosing
system defects.
Internal air bag control unit is consisted as follows;
lMicroprocessor
lASICs (Upper side ASIC & lower side ASIC)
lAccelerometer sensor
lArming sensor
lSystem energy backup condenser
lSquib energy backup condenser

SUPPLEMENTAL RESTRAINT SYSTEM(SRS) 8B-5
Input & Output Function
Electronic air bag control and diagnosis module is connected
by full 30-pin connectors.
Input : ground
Output : 1 squib line, warning lamp
Input/output : communication, diagnosis
16 Shorting Bar
17 Shorting Bar
18 Shorting Bar
19 Shorting Bar
20 Diagnosis
21 Shorting Bar
22 Shorting Bar
23 No Pin
24 No Pin
25 Shorting Bar
26 Shorting Bar
2 7 N/A
28 Shorting Bar
29 Shorting Bar
3 0 N/A 1 Lamp
2 Ground
3 N/A
4 N/A
5 Ignition
6 N/A
7 N/A
8 CONF
9 N/A
1 0 N/A
11 N/A
1 2 N/A
13 Squib Line 1(upper)
14 Squib Line 1(lower)
1 5 N/A
IGN
GND
Warning lamp
RxD/TxD
Inflator line 1
+
- 5
2
1
20
13
14
Air bag lamp
Communication/
diagnosis
Air bag
control
unit
Ground connection or open
Connector Pins
15
301
16

8B-6 SUPPLEMENTAL RESTRAINT SYSTEM(SRS)
AIR BAG MODULE
Air bag module is installed in the pad of steering wheel center and inflator is consisted of igniter, explosives, gas
generating material and bag. When crashed, the air bag control unit sends current to the air bag module through
squib line and this current ignites as ignition energy (6mJ) momentarily igniting explosives and bag will be inflated
by nitrogen gas protecting driver at the same and then deflates.
1 Air bag Module
2 Module Housing
3 Bag
4 Module Bracket
5 Retainer Ring
6 Inflator
7 Horn Switch
8 Backing Plate