2003 SSANGYONG MUSSO oil

SECTION 5D2
TRANSFER CASE (TOD)
Specifications . . . . . . . . . . . . . . . . . . . . . . . 5D2-1General Specifications . . . . . . . . . . . . . . . . . 5D2-1
Schematic and Routing Diagrams . . . . . . . 5D2-2 TOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5D2-2
T.C.C.U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5D2-3
Function Description . . . . . . . . . . . . . . . . . 5D2-4
TOD Control Unit . . . . . . . . . . . . . . . . . . . 5D2-12
Control Unit Diagram . . . . . . . . . . . . . . . . 5D2-14
TOD Control Unit . . . . . . . . . . . . . . . . . . . . 5D2-14
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . 5D2-15 Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . 5D2-15
Diagnostic Trouble Codes (DTC's) . . . . . . . 5D2-17
TABLE OF CONTENTS
SPECIFICATIONS
GENERAL SPECIFICATIONS
ModelLength (mm)Weight (kg)Shift ModeGear Ratio Oil
Max. Torque
High Low SpecificationCapacityInterval TOD(Torque On Demand) Transfer Case (4423E)
343.036.6
4H and 4L
1 : 1
2.48 : 1
ATF S-3, S-4 or Dexron II, III 1.4 L
Inspect Every 15,000km, Replace Every 50,000km 550 lbft ( 76kg m)
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= .
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= .
Application Description
Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5D2-18
Eliminate the Memorized Fault Code . . . . .
5D2-20
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . 5D2-21
Maintenance and Repair . . . . . . . . . . . . . 5D2-33
On-Vehicle Service . . . . . . . . . . . . . . . . . . . 5D2-33
TOD Control Unit . . . . . . . . . . . . . . . . . . . . 5D2-33
Transfer Case (TOD) . . . . . . . . . . . . . . . . . 5D2-34
Speed Sensor in Front and Rear Propeller Shaft . . . . . . . . . . . . . . . . . . . . . 5D2-38
Replacement of Oil . . . . . . . . . . . . . . . . . . . 5D2-40
Unit Repair . . . . . . . . . . . . . . . . . . . . . . . . 5D2-41 Transfer Case . . . . . . . . . . . . . . . . . . . . . . . 5D2-41

5D2-4 TRANSFER CASE (TOD)FUNCTION DESCRIPTION
TOD System Select Mode (4H and 4L) 4H is the mode when drive normally of which gear ratio is 1:1 and 4L mode distributes power to front and rear wheels 50:50 of which gear ratio is 2.48:1.
TOD System Function (select 4H mode) TOD system controls clutch mechanism to comply with rotation in front and rear propeller shaft and if its difference exceeds the permissible range, corresponding power is distributed into front wheel through EMC (Electro-MagneticClutch). Hall effect sensor signals speed on front and rear propeller shafts going through with TOD control unit.
Transfercase clutch coil is activated by variable current on exceeding difference of speed in front and rear propeller shafts.
Function of 4L Mode When select 4L mode, EMC is locked to apply maximum torque into front and rear propeller shafts. Shift motor rotates also 4L position by rotation of cam thus propeller shaft torque changes from 1:1 to 2.48:1 by planetarygear set.
Shift Motor It locates backside transfer case, which drives rotary helical cam. When mode select switch changes to 4L, shift fork is on position for 2.48:1 by rotation of helical cam.
Transfer Case
TOD transfer case distributes power into front and rear axle by operation of 4H/4L switch and shift motor. Shifting 4H to 4L, is performed towards reducing HI-LO collar by means for connection HI-LO shift fork with
output shaft in order to join with planetary gear. Torque transmits input shaft then sun gear rotating front planetary
gear. Front planetary gear join with output shaft and drives LO position.

TRANSFER CASE (TOD) 5D2-13
Speed Sensor/Clutch Coil and Motor Connector Speed senso /clutch coil and shift motor connector locate upper backside transfer case (upper part of shift motor).
- Shift motor connector : Black
- Speed sensor and clutch coil connector : White
Shift Mtor Connector Speed Sensor/Clutch Coil ConnectorRear View for Connector
Pin A B
CD
EF
G Function
Position 4Motor (Counter-Clockwise)Position 3Position 2 Position 1 Position RetumMotor (Clockwise) Pin
HI
J
K L
M N Function
Clutch Coil (EMC) Front Speed ReturnFront SpeedFront Speed Sensor Supply Rear Speed Sensor Supply Rear SpeedRear Speed Return
Rear View for Connector

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) 5D2-27
Defect in speed sensor : fault code 1731, 1732, 1733, 1734, 1735,1736
Phenomenon
1. Upon diagnosis by SCANNER, it displays on fault code
1731, 1732, 1733, 1734, 1735 and 1736.
2. “4WD CHECK ” lamp illuminates continuously when
ignition “ON ”.
Cause
1. Defect of speed sensor (front, rear).
2. Defect of power supply.
4.75-5.25Vdc
Ye sNo
D1
Ye s
No
D2
Ye s
Ye s
Ye sNo
D3 Test Stage / Contents
Result
Stage T est Contents and Procedure Specified Value
/Yes/No Countermeasure
Check power supply of speed sensor.
1. Ignition
“ON ” or driving mode
2. Measure supply voltage between pin 16 (+) and 13 (-) in
TOD control unit connector using digital multi-tester.
- Specified value
- Measured value is within specified range ?
Check connection status of connector.
1. Check connection status of speed sensor/clutch coil connector and TOD control unit connector.
- Does it connect correctly ?
2. In case of bad connection, connect it correctly then perform the follows:
a. Delete the memorized fault code in control unit by
SCANNER.
b. Ignition “OFF ”.
c. Ignition “ON ”.
d. Diagnose by SCANNER.
- It does not display fault code.- It displays one or more fault code among 1731 to1736.
Check output wave of front and rear speed sensor.
1. Upon driving mode.
2. Check output wave of each speed sensor by SCANNER.
3. Is it normal on output wave ? Perform D3 stage Perform D2 stage
Perform D3 stagePerform D2-2 stage Normal system Perform D3 stage Perform D4 stage Replace speed sensor then perform D2-2 stage

TRANSFER CASE (TOD) 5D2-35
Removal & Installation Procedure1. Disconnect (-) cable from battery.
2. Lift on vehicle and make sure on safety. NoticeBe careful for catalytic converter due to high temperature after driving or engine running.
3. Prepare a vessel to drain transfer case and manual transmission oil.
4. Release drain plug and drain transfer case and manual transmission oil. If planar damper is installed, unscrew 4 bolts and remove
the planar damper. NoticeOil drain should be along with whole transfer case
disassembly and assembly.
5. Disconnect transmission extension wiring connector back
side transfer case. Notice
When disconnect connector, make sure on direction of locking tab towards inside.
6. Disconnect shift motor/clutch coil connect (Black 7 pin) connector upper backside.
7. Disconnect front and rear speed sensor connector (white 7 pin).
8. Disconnect speedometer sensor connector right upper side.
9. Disconnect breather tube front upper side transfer case (upper connecting point of transfer case and front propeller).
10. Prepare hydraulic jack and support transfer case assembly.

TRANSFER CASE (TOD) 5D2-37
Replacement of Shift Motor
1. Disconnect (-) cable from battery.
2. Disconnect shift motor/clutch coil connector (black pin7)upper backside.
3. Unscrew 3 units of shift motor mounting bolts (M10).
4. Unscrew 1unit of bracket mounting bolt (M10). Installation Notice
Tightening Torque 9 - 11 Nm
Notice When disconnecting shift motor and mounting bracket, it is required to unscrew 2 units of adjusting bolts (M10) formmotor and bracket.
5. Keep shift motor even then pull rearward.
6. Clean connection surface of transfer case and shift motor.
7. If necessary, make a test by SCANNER with shift motor assembly.Notice
Do not disassemble shift motor. If necessary, replace by shift motor assembly unit.
8. Applying sealant into connecting surface for new shift motor.
9. Installation should follow the removal procedure in the reverse order. Before installation, make sure that motor position match with mode of 4H/4L switch. ReferenceWhen accord position of motor with 4H/4L switch and transfer case match position of the disconnected motor and newone.

5D2-38 TRANSFER CASE (TOD)
SPEED SENSOR IN FRONT AND REAR PROPELLER SHAFT Replacement Procedure
1. Disconnect (-) cable from battery.
2. Detach shift motor assembly.
3. Disconnect front and rear speed sensor connector (white 3pin) upper backside transfer case.
4. Disconnect speed sensor connect from locking sleeve by pushing.
5. Disconnect wire stick cap from the detached connector.
6. Unscrew rear speed sensor mounting bolt (M10) from upper side of rear case flange.
7. Detach sensor from transfer case by lifting up using tool. Notice
When disconnect sensor, make sure on adequate pressure due to sensitiveness with shock.
8. Disconnect taping from both protection tube ends that wrap 3 wires of speed sensor and 1 wire of clutch coil.
9. Disconnect tube.