2003 SSANGYONG MUSSO Service 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 otherwisenoted.
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 Bolt N
m
35 - 55

8A-2 SEAT BELTCOMPONENT LOCATOR
FRONT SEAT BELT
1 Seat Belt Assembly (3-Point)
2 Buckle Assembly
3 Seat Belt Dust Cover
4 Seat Belt Webbing Guide
5 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 BELT1 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 BELTGENERAL 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 beltis not fastened when the ignition is turnd ON.
OPERATION AND FUNCTIONAL CHECKS Caution :
Keep sharp objects and potentially damaging objects away from the seat belts.
Avoid bending or damaging any portion of the buckleor the latch plate.
Do not bleach or dye the belt webbing. Use only mild soap and water in order to clean the belts.
When installing the seat belt anchor bolts and thescrews, start the bolts and screws by hand in order to prevent crossthreading.
Do not attempt any repairs on the retractormechsemblies with new assemblies.
Replace 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-1General 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 otherwisenoted.
SPECIFICATIONS
GENERAL SPECIFICATIONS
Application
Air bag System Deployment Time
Detection Time
Operating Temperature
Storage TemperatureAir Bag Replacement Interval
Voltage Range Current Consumption Acceleration Range Max. Acceleration
Voltage Ramp Energy Reservation Inflator Ignition EnergySquib 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
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 offollowing 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 servicemanual 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 diagnosingsystem defects. Internal air bag control unit is consisted as follows;
Microprocessor
ASICs (Upper side ASIC & lower side ASIC)
Accelerometer sensor
Arming sensor
System energy backup condenser
Squib energy backup condenser