SSANGYONG MUSSO 2003 Service Manual

SUPPLEMENTAL RESTRAINT SYSTEM(SRS) 8B-11
Self-Diagnosis List
Fault
CodeDefects Service Hint
01 Driver’ s squib (+) side No. 1 Short of (+) side No. 1 in the driver ’ s squib circuit.
Check connection of connector.
Check the ECU.Appli-
cation
02 Driver’ s squib (+) side No. 2 Short of (+) side No. 2 in the driver ’ s squib circuit.
Check connection of connector.
Check the ECU.X
03 Driver’ s squib (+) side No. 3 Short of (+) side No. 3 in the driver ’ s squib circuit.
Check connection of connector.
Check the ECU.X
04 Driver’ s squib (+) side No. 4 Short of (+) side No. 4 in the driver ’ s squib circuit.
Check connection of connector.
Check the ECU.X
05 Driver’ s squib ground (-) side No. 1 Short of ground side No. 1 in the driver ’ s squib
circuit.
Check and replace the ECU.
06 Driver’ s squib ground (-) side No. 2 Short of ground side No. 2 in the driver ’ s squib
circuit.
Check and replace the ECU.X
07 Driver’ s squib ground (-) side No. 3 Short of ground side No. 3 in the driver ’ s squib
circuit.
Check and replace the ECU.X
08 Driver’ s squib ground (-) side No. 4 Short of ground side No. 4 in the driver ’ s squib
circuit.
Check and replace the ECU.X
09 Energy shutdown switch No. 1 Air bag control unit internal defects.
Check and replace the ECU.
10 Energy shutdown switch No. 2 Air bag control unit internal defects.
Check and replace the ECU.X
11 Energy shutdown switch No. 3 Air bag control unit internal defects.
Check and replace the ECU.X
12 Energy shutdown switch No. 4 Air bag control unit internal defects.
Check and replace the ECU.X
13 Ignition switch wire No. 1 Air bag control unit internal defects.
Check and replace the ECU.
14 Ignition switch wire No. 2 Air bag control unit internal defects.
Check and replace the ECU.X
15 Ignition switch wire No. 3 Air bag control unit internal defects.
Check and replace the ECU.X
16 Ignition switch wire No. 4XAir bag control unit internal defects.
Check and replace the ECU.

8B-12 SUPPLEMENTAL RESTRAINT SYSTEM(SRS)
Fault
CodeDefects Service HintAppli-
cation
17 Squib No. 1 resistance
18 Squib No. 2 resistanceX
19 Squib No. 3 resistanceX
20 Squib No. 4 resistanceX
21 Squib No. 1 resistance
22 Squib No. 2 resistanceX
Driver ’ s squib resistance is higher than standard (4.5±0.5W).
Check related circuits for open/short.
Check connection of connector.
Check the ECU.
Replace the squib wire.
Plus side short : 7k, ground side short : 6kW.
Driver ’ s squib resistance is higher than standard(4.5±0.5W).
Check related circuits for open/short.
Check connection of connector.
Check the ECU.
Replace the squib wire.
Plus side short : 7k, ground side short : 6kW.
Driver ’ s squib resistance is higher than standard (4.5±0.5W).
Check related circuits for open/short.
Check connection of connector.
Check the ECU.
Replace the squib wire.
Plus side short : 7k, ground side short : 6kW.
Driver ’ s squib resistance is higher than standard (4.5±0.5W).
Check related circuits for open/short.
Check connection of connector.
Check the ECU.
Replace the squib wire.
Plus side short : 7k, ground side short : 6kW.
Driver ’ s squib resistance is lower than standard(1.4±0.3W).
Check related circuits for open/short.
Check connection of connector.
Check the ECU.
Replace the squib wire.
Plus side short : 7k, ground side short : 6kW.
Driver ’ s squib resistance is lower than standard (1.4±0.3W).
Check related circuits for open/short.
Check connection of connector.
Check the ECU.
Replace the squib wire.
Plus side short : 7k, ground side short : 6kW.
23 Squib No. 3 resistanceXDriver ’ s squib resistance is lower than standard (1.4±0.3W).
Check related circuits for open/short.
Check connection of connector.
Check the ECU.
Replace the squib wire.
Plus side short : 7k, ground side short : 6kW.

SUPPLEMENTAL RESTRAINT SYSTEM(SRS) 8B-13
Fault
CodeDefects Service HintAppli-
cation
24 Squib No. 4 resistance
X
25 Energy reserve No. 1 voltage
26 Energy reserve No. 2 voltageX
27 Energy reserve No. 3 voltageX
28 Energy reserve No. 4 voltageX
29 Energy reserve No. 5 voltage
30 Energy reserve No. 6 voltage
31 Energy reserve No. 1 current off capacity
32 Energy reserve No. 2 current offcapacityX
33 Energy reserve No. 3 current offcapacityX
34 Energy reserve No. 4 current off
capacityX
35 Energy reserve No. 5 current offcapacity
36 Condensor voltage
37 Collision times checksum
Driver ’ s squib resistance is lower than standard
(1.4±0.3W).
Check related circuits for open/short.
Check connection of connector.
Check the ECU.
Replace the squib wire.
Plus side short : 7k, ground side short : 6kW.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
4 1 Major USAAir bag control unit internal defects.
Check and replace the ECU.
38 Driver’ s acceleration sensor
39 Driver’ s acceleration sensor off-set
40 Arming sensor

Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.

8B-14 SUPPLEMENTAL RESTRAINT SYSTEM(SRS)
Fault
CodeDefects Service HintAppli-
cation
42 Over heat
4 3 SENS
44 Standard band gap
45 Temperature sensor
46 Warning lamp
47 Battery voltage
49 Fault code list
5 0 USA communication
51 LSA communication
52 No EEPROM program
53 EEPROM checksum
5 4 EEPROM map
55 External watchdog 1
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Open/short in the warning lamp circuit.
Check related circuits for open/short.
Check connection of connector.
Check the ECU.
Power wire voltage is out of standard voltage (9 - 16V).
Check the battery for voltage and charging.
Check related circuits for open/short.
Check connection of connector.
Check the ECU.
Air bag control unit internal defects.
Check the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
56 Arming sensor-no close
57 RAM check
5 8 System
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.
59 External watchdog 2
60 Pulse
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.

SUPPLEMENTAL RESTRAINT SYSTEM(SRS) 8B-15
Fault
CodeDefects Service HintAppli-
cation
127 Collision signal
128 Collision number
Air bag control unit internal defects.
Check and replace the ECU.
Air bag control unit internal defects.
Check and replace the ECU.

8B-16 SUPPLEMENTAL RESTRAINT SYSTEM(SRS) CIRCUIT DIAGRAM

SUPPLEMENTAL RESTRAINT SYSTEM(SRS) 8B-17
AIR BAG DIAGRAM

8B-18 SUPPLEMENTAL RESTRAINT SYSTEM(SRS)
MAINTENANCE AND REPAIR ON-VEHICLE SERVICE AIR BAG MODULE Removal & Installation Procedure
1. Remove the steering wheel rid (LH,RH) with a screwdriver.Installation Notice Each position mark (LH,RH) is stamped on the inner surface of the rids.
Tightening Torque 7 - 11 Nm
3. Disconnect the connectors and remove the air bag module.
4. Installation should follow the removal procedure in thereverse order.
2. Unscrew the bolts from both sides.
Installation Notice

SUPPLEMENTAL RESTRAINT SYSTEM(SRS) 8B-19
Air Bag Horn (Relay) Remote Control (Electronic Circuit)
CLOCK SPRING
General SpecificationVoltage
Rating Operating VoltageCurrent Rating Air Bag Circuit Resistance Isolating ResistanceRotating Range DC 12V
DC 6 - 18V
10 - 30mA(6A,0.1second)
200 - 220mA
15mA
0.16 - 0.38 (-40°C - 85°C)
5M
2.7 - 3.1 Rotation from neutral Position to Both Sides
Notice
Clock spring can not be repaired.
Do not disassemble or modify.
To adjust to the center position, rotate clockwise until it stops and then rotate it counterclockwise 2.3 ± 0.2revolutions and align marks. If not, airbag system can
not work normally and driver can be injured seriously.

8B-20 SUPPLEMENTAL RESTRAINT SYSTEM(SRS) Removal & Installation Procedure preceding work : removal of steering wheel
1. Turn the ignition switch to “OFF” position and disconnectthe battery negative cable. Start the procedure after waiting over 3oseconds.
2. Unscrew 3 screws from lower cover on steering column shaft and remove the lower cover.
3. Unscrew 4 screws from clock spring and remove the clock
spring
Installation Notice
Don’t try to repair and modify the clock spring.
When aligning the neutral position, turn to clockwise until it stops, and turn to counter clockwise until the marks are aligned