2003 SSANGYONG MUSSO air condition

TRANSFER CASE (PART TIME 4408) 5D1-37
Inspection and Repair
1. 4H and 4L indicator light inspection When turn the ignition switch to "ON" position, 4H and
4L indicator light will turn on for 0.6 second and will turn
off immediately.
Notice
If indicator light does not turn on, check bulb, wiring harness and TCCU.
2. TCCU inspection
Pin No. Operation Condition
4H or 4L
2H
4H indicator light ON
4H indicator light OFF 2H or 4H4L
Clutch pedal applied
Clutch pedal released 4L indicator light ON
4L indicator light OFF Motor OFF
Motor ON
Motor OFF Motor ON
Auto locking hub ON
Auto locking hub OFF Voltage(V)
4.75 - 5.35
0 - 0.50< 1.00
> 11.00
4.75 - 5.35 0 - 0.50
< 0.50
> 11.00
< 1.00
> 11.00 < 1.00
> 11.00 < 1.00
> 11.00
> 11.00 < 1.00
J1 - 7
J1 - 8
J1 - 13 J1 - 14 J1 - 15 J1 - 16 J1 - 17 J1 - 23
Notice DC 12V for the TCCU operation should be maintained.
In case of J1-8 and J1-15, indicator light will turn on for 0.6
second when turn the ignition switch ON.
If 4H and 4L indicator lights remain turned on when turn the
ignition switch on or during driving, perform the TCCUdiagnosis.

TRANSFER CASE (TOD) 5D2-25
Error in electro - magnetic clutch : fault code “1721 ”, “1722 ”
Phenomenon
1. Upon diagnosis by SCAN-100, it displays on fault
codes “1721,1722 ”.
Cause
1. Defect in electro - magnetic clutch
2. Defect in connector or wiring
- Open or short from EMC to the supply : 1721
- Short EMC to ground : 1722
Ye sNo
C1
Ye sNo
Ye s
No
11-15Vdc Ye s
No
C2
Ye sNo
Test Stage / ContentsResult
Stage T est Contents and Procedure Specified Value
/Yes/No Countermeasure
Check relevant connector connection status.
1. Check relevant connector connection status with TOD
control unit.
- Does it connect correctly ?
2. Check connection status of speed sensor and clutch coil connector (7 pin) in transfer case.
- Does it connect correctly ?
3. In case of bad connection, connect it correctly then perform the follows :
a. Delete the memorized fault code in control unit withScan - 100.
b. Ignition “OFF ”.
c. Ignition “ON ”.
d. Diagnose by SCAN-100
- Does it display on fault codes “1721,1722 ” ?
Check supply voltage into electro-magnetic clutch.
1. Ignition “ON ”
2. Measure voltage between pin 4/19(+) and 17/18(-) in TOD control unit connector.
- Specified value
- Measured value is within specified range ?
3. If the specified value would not be measured, perform the follows :
a. Check battery voltage (charging condition)
b. Check open circuit on No.13 fuse (20A)
c. Check relevant wires.
- Is the above 3a, 3b, 3c normal ? Perform C1-2 stage Perform C1-3 stage Perform C2 stage Normal system
Perform C2 stage Perform C1-3 stage Perform C3 stage Perform C2-3 stage Perform C3 stage

Charging/ Replace battery
Replace fuse
Repair wires

TRANSFER CASE (TOD) 5D2-31
Position incoder and position 1,2,3,4 malfunction :Fault code®1750,1751,1752,1753, 1754
Phenomenon The ‘4WD check ’ lamp can not go out when the ignition
switch positioned to ‘ON ’.
The fault code display 1750, 1751, 1752, 1753, 1754 by diagnosis of SCAN-100.
Cause The portion of position incoder malfunction, each wiring is shorted with ground.
Ye s
No
F1
Ye s No
Ye s
No
F2 Test Stage / Contents
Result
Stage T est Contents and Procedure Specified Value
/Yes/No Countermeasure
Check the installation condition of connector.
1. Check the installation condition between 30 pin connector
of TOD control unit and motor connector of T/C portion.
- Is it installed properly ?
2. If the connector installation is improper, install properly and then execute follow procedure.
a. Delete the all fault code from memory by scan scope.
b. Turn off ignition switch.
c.Turn on ignition switch.
d. Rediagnosis the system.- Does the fault codes display one or more among
1750 ~ 1754. Check the each wiring whether it is shorted or not.
1. Turn off the ignition switch
2. Detach the 30 pin connector of TOD control unit.
3. Perform short test each connector, No.27 (Position 1), No.10 (Position 2), No.28 (Position 3),No.30 (Position
4), No.6 with body.
- Is there resistance of 0 ? Perform F2 stagePerform F1-2 stage Perform F2 stage Normal system Repair or replace due to wiring short
1. Replace the
motor Ass ’y due
the defectiveposition incoder portion.
2. And then, perform F1-2 stage.

SECTION 7D
FULL AUTOMATIC TEMPERATURECONTROL HEATING, VENTILATION AND AIR CONDITIONING SYSTEM
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 7D-1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 7D-1
Service Specifications . . . . . . . . . . . . . . . . . . . 7D-3
Schematic and Routing Diagrams . . . . . . . . 7D-4
Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . 7D-4
FATC Block Diagram . . . . . . . . . . . . . . . . . . . . 7D-5
Component Locator . . . . . . . . . . . . . . . . . . . 7D-6 TABLE OF CONTENTS
Ventilation System . . . . . . . . . . . . . . . . . . . . . . 7D-6
Function Description . . . . . . . . . . . . . . . . . . . . 7D-7
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 7D-8
Diagnosis Test . . . . . . . . . . . . . . . . . . . . . . . . 7D-8
Maintenance and Repair . . . . . . . . . . . . . . 7D-11 FATC Control Panel . . . . . . . . . . . . . . . . . . . 7D-11
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 7D-15
FATC (Full Automatic Temperature Control) is full automatic heater and airconditioning system that detects incar temperature, ambient temperature, sun load and coolant temperature and controls airconditioner system
blowing capacity, outlet temperature and intaking/outlet mode to maintain interior comfort.
SPECIFICATIONSSPECIFICATIONS
Application
Core Size (LxWxT)
Core Type
Expansion Valve Type Thermostat
Resister TypeCooling Capacity Description
237.0x232.0x92.0 Aluminum plate
Angle
ON:4.5±0.6 °C, OFF:1.5±0.6 °C
Aluminum plate
4,500 Kcal/h(AT 420 CMH)
Evaporator Unit
Application
Capacity
Type Description
650-750 g R134a
Refrigerant

FATC-HAVC 7D-5
FATC BLOCK DIAGRAM
INCAR SENSOR
AMBIENT SENSOR
WATER TEMPERATURE SENSOR
SUN LOAD SENSOR
TEMPERATURE SWITCH
BLOWER SWITCH
MODE SWITCH
DEFROSTER SWITCH
INTAKE SWITCH
AUTO SWITCH
A/CON SWITCH
OFF SWITCH
TEMP DOOR POSITION FEEDBACKVOLTAGE
POWER TRANSISTOR COLLECTORVOLTAGE
VFD
MAX HI RELAY
POWER T/R
BLOWERMOTOR
ECUCOMPRESSOR
MIX ACTUATORMIX DOOR
INTAKE ACTUATORINTAKE DOOR
MODE ACTUATORMODE DOOR
Airconditioner output
C ON
T
RO L
UN I
T

FATC-HAVC 7D-7
FUNCTION DESCRIPTION 1. AUTO switch
By pressing the AUTO switch, set temperature, AUTO, fan speed, air source, air flow mode will be
appeared on the VFD display.
Following items will be controlled automaticallyaccording to set temperature. - Mode and intake door
- Temperature door- Blower fan speed- Compressor ON/OFF control
When AUTO switch is released, other functions will be controlled automatically except for manually selected switches.
2. MODE switch
By pressing the MODE switch while the AUTO switch is turned ON, AUTO indicator light will go off and air flow mode will be controlled manually in the order of VENT B/L FLR MIX VENT.
3. OFF switch
Press this switch and the airconditioner system will
be turned OFF.
4. Temperature UP/DOWN switch
This switch is a switch increasing or decreasing set temperature and position of the temperature doorwill be automatically controlled according to set temperature and outlet temperature will be controlled
by adjusting blending ratio of cold and hot air.
By operating the switch, set temperature will beincreased/decreased by 0.5 °C.
Set temperature range is 17 - 32 °C.
Max. cold function will be performed at set temperatureof 17 °C and max. hot function will be performed at
set temperature of 32 °C.
When pressed more than 1 second, it will beautomatically UP/DOWN by interval of 0.28 sec. after1 second.
When it changed 17.5 °C17 °C, 31.5 °C32 °C and
DOWN switch is pressed after 17 °C or UP switch is
pressed after 32 °C, there will be operating sounds 3
times during 0.1 sec. 5. DEFROST switch

By pressing this switch, DEF will turn on and mode
door will be fixed at DEF.
Recirculation/fresh air switch will be fixed as FRESH.
When airconditioner is turned ON and ambienttemperature is less than 1.5 °C, the airconditioner
will be turned off.
Selection of airconditioner OFF is possible by manual.
6. A/C switch
The airconditioner system will be turned ON or OFF by pressing this switch.
7. Recirculation fresh air switch
Air intake will be automatically switched to recirculationor fresh air (REC FRE) by pressing this switch.
8. Blower switch (UP/DOWN)
Blower speed can be controlled by manual and if fan UP/DOWN switch is pressed when AUTO mode isselected, fan speed will UP/DOWN based on currentfan level.
When 6 segments are turned on, it is max. HI operation.
When pressed more than 1 second, it will beautomatically UP/DOWN by interval of 0.28 sec. after 1 second.
When segment is changed stage 2 stage 1 (LO),
stage 5 stage 6 (HI) and HI switch is pressed in HI
status or DOWN switch is pressed in LO status, therewill be operating sounds 3 times during 0.1 sec.
When switch is operated in OFF status, it will be operated as stage 1 (1 segment display).

7D-8 FATC-HAVC Self-diagnosis Method
Ignition switch “ON ”
Press the intake switch more than 4 times within
2 seconds while pressing the AUTO switch
Self-diagnosis will start after turning off all displays on VFD for 2.5 seconds
Self-diagnosis items check (continuous action)
Airconditioner control
Self-diagnosis items check
(step action)
Press AUTO Press AUTO Press OFF
Press OFF
DIAGNOSIS TEST
FATC airconditioner system has self-diagnosis function.
Turn the ignition switch ON and press intake switch more than 4 times within 2 seconds while the AUTO switch is
1 AUTO Switch
2 Intake Switch
3 OFF Switch 4 Airconditioner Switch
5 Set temperature Display
pressed, then it will diagnose incar sensor, ambient
sensor, water temperature sensor and temperature actuator for open/short and will display numerical fault code on the set temperature display of VFD.
DIAGNOSIS

FATC-HAVC 7D-9
Diagnosis Item and Fault Code Self-diagnosis Display
1. Data will be displayed at the set temperature display as 2-digit number during self-diagnosis function and other settemperature displays will be OFF.
2. Display of self-diagnosis fault code will be blinking fault code number in the intervals of 0.5 sec.
3. Following fault code number will be displayed at the set temperature display during self-diagnosis function.
4. If no defective, normal display number (00) will blink. Display during continuous action
A. Normal or 1 fault (00 or 11) 15: coolant Sensor Open
16: coolant Sensor Short
17: temperature Actuator Open/Short
18: temperature Actuator Drive Fault
00: normal
11: incar Sensor Open
12: incar Sensor Short
13: ambient Sensor Open
14: ambient Sensor Short
B. Multiple faults (11,13,15.........) Display during step action
A. Normal or 1 fault : the same as continuous action
B. Multiple faults

0.1 sec. 0.1 sec.
0.5 sec.
ON
0.5 sec.OFF
ON
OFF
Display
Buzzer
0.5 sec.Fault 13
0.5 sec.OFF
Fault 15
OFF
Display
Buzzer
Fault 13 Fault 17
Display Buzzer AUTO switch pressedFault
17 Fault 17
Airconditioner switchpressedFault11 Fault 11


0.1 sec. 0.1 sec.