low oil pressure SSANGYONG MUSSO 2003 Owner's Guide

AUTOMATIC TRANSMISSION 5A-57
POWER FLOW - DRIVE 4 (OVERDRIVE)
In Drive 4 (Overdrive), transmission drive is via the input shaft to the forward clutch cylinder. The elements of the transmission function as follows :
The C1 clutch is applied to drive the planet carrier clockwise.
The B1 band is applied to hold the reverse sun gear stationary.
As the planet carrier tuns, the long pinion ‘walks ’ around the stationary reverse sun gear and rotates around its
axis driving the internal ring gear and output shaft in a clockwise or forward direction at a speed faster than the input shaft i.e. in overdrive ratio.
The forward sun gear is also driven faster than the input shaft and overruns the 3-4 OWC.
The C2 clutch is engaged to reduce the speed differential across the 3-4 OWC.
Control
To maintain this arrangement in the steady state solenoids and valves are activated as follows: Solenoid S1 is switched On. S2 is switched Off.
With S1 switched On the 3-4 shift valve is held in the fourth gear position by line 500 pressure on the small end
of the valve.
With S2 switched Off the 2-3 shift valve is held in the fourth gear position by line 500 pressure on the large end of the valve.
The 1-2 shift valve is held in the fourth gear position by S2 oil pressure.
2nd oil (line pressure) from the 1-2 shift valve is directed to the band apply regulator valve, and to the 2-3 shift
valve.
The band apply regulator valve supplies 2nd oil (regulated to line pressure multiplied by the valve ratio) to the
band apply feed (BAF) circuit.
Band apply feed oil is directed to: - the outer apply area of the front servo- the inner apply area of the front servo piston via the 3-4 shift valve
- the 1-2 shift valve to provide an exhaust port when the transmission is shifted to first gear
2nd oil at the 2-3 shift valve is directed to the 3rd oil circuit.
3rd oil from the 2-3 shift valve is directed to the clutch apply regulator valve, and to the 4-3 Sequence Valve.
The clutch apply regulator valve supplies oil (regulated to line 500 pressure multiplied by the valve ratio) to the
clutch apply feed (CAF) circuit.
The CAF oil is directed to:- the C1 clutch- the C1 bias valve- the 4-3 sequence valve
Drive oil (line pressure) from the manual valve engages the C2 clutch
Refer to figure 5.8 and table 5.9.
Table 5.9 - Engaged Elements - Drive 4 (Overdrive)
Gear State
Drive 4 (Overdrive) C1
X C2
X C3
- C4
- B1
X B2
- 1-2
OWC - 3-4
OWC X LU
CLUTCH -
ELEMENTS ENGAGED

5A-62 AUTOMATIC TRANSMISSION
Identification
Gear Lever Position
Transmission Oil
Temperature Solenoid 4 Solenoid 1 Do not use Solenoid 5Return (-ve) Gear Lever Position - Ground
Transmission Oil
Temperature - Ground Solenoid 6 Solenoid 2 Solenoid 3 Solenoid 7 Do not use Solenoid 5 (+ve) Type
IP IP
OPOP -
IP
GND GND OPOP OP OP -
OP Description
This switch has discreet values indicating the
positions selected by the gear shift lever
(PRNDL). Voltage varies 0V to 5V.
Resistive sensor indicates transmission tem-perature .High R = low temp Low R = high temp
Voltage varies 0V to 5V.
On/Off solenoid normally open, combines with
other On/off solenoid 3 for shift quality and se-quencing.
On/off solenoid normally open, combines with
other On/off solenoid to set the selected gear.
This ensures the earth path for the VPS and
the current in this line is monitored to give feed-
back control of the VPS. PRNDL switch ground. Ground reference for temperature sensor in-
put.
On/Off solenoid normally open, sets low/high line pressure.
On/off solenoid normally open, combines with
other On/off solenoid to set the selected gear.
On/off solenoid normally open, combines with
On/off solenoid 4 for shift quality and sequenc- ing.
On/off solenoid normally open, locks up the
torque converter to Increase cruising efficiency. This is the variable force solenoid which ramps the pressure during gear changes and solenoid
switching, to enhance transmission shift quality.
4WD
(Diesel)
O O

4WD
(Gas)
O O






Pin
No. 31 32 33 34 35 36 37 38 39 40 41 42 43 44






= circuit connected
O = circuit not connected
* = unique
OP = Output
IP = Input
I/O = Input/output
GND = Ground
REF = Reference
Notice :

AUTOMATIC TRANSMISSION 5A-65
If the gear lever is incorrectly adjusted, the transmission may shift gears on bumpy road surfaces.
6 Transmission Oil Temperature Sensing FaultAll shifts will be firm until the transmission has warmed up, because a high transmission oil temperature is
assumed.
If a fault is undetected, the temperature is likely to be evaluated as being lower than actual, resulting in softer shifts with ‘end bump ’ (very firm feel at the end of the shift).
7 Mode Setting Fault All shifts will occur as if the mode is set to ‘NORMAL ’ .
The mode indicator will always be off indicating that ‘NORMAL ’ mode is selected.
The mode indicator will not respond to changes in switch setting.
If a fault is undetected, the mode as indicated by the mode indicator is not likely to respond to the mode switch.
8 Battery Voltage Sensing Fault
If the battery voltage is low then shifts to first gear are inhibited.9 the battery voltage is high (>16.5V) then the transmission goes into limp home (LHM) mode.
If a fault is undetected, the transmission is likely to incorrectly evaluate an ON/OFF solenoid fault resulting in limp home mode (LHM) operation.
9 ON/OFF Solenoid Fault (Solenoids 1,2,3 and 4)
The transmission adopts its limp home mode (LHM) operation, described above. However, if solenoid 1 is faulty then
the fourth gear LHM strategy will be adopted independent of vehicle speed.
If a fault is undetected, the operation of the transmission is dependent on which solenoid is actually faulty. The
characteristics for different solenoid fault conditions are listed in table 6.1.2.
10 ON/OFF Solenoid Fault (Solenoids 6,7)
If solenoid 6 is found faulty it is always disabled resulting in high line pressure being applied continuously.
If solenoid 7 is found faulty it is disabled resulting in the transmission being locked always.The transmission does not go into LHM.
11 Variable Pressure Solenoid Fault The transmission adopts its LHM operation.
If a fault is undetected, the transmission shift feel is likely to be poor for all shifts.
12 Software Fault
The transmission adopts the third gear LHM strategy of operation, independent of vehicle speed. The operation of
the TCU under this condition is difficult to predict. Its operation may be erratic.
If a fault is undetected, the operation of the TCU is likely to be erratic.
13 Power Supply Fault
The transmission adopts the third gear LHM strategy of operation, independent of vehicle speed. If there is an
intermittent power supply connection, the TCU will power-up in fourth gear and then shift to the appropriate gear to
satisfy the conditions present. The power supply is not monitored for fault evaluation.
All faults except for solenoid faults can be recovered without having to turn the TCU off and back on. However, in
general the recovery requires that no faults are present for a period of time (approx. 3 or 30 seconds). Recovery from
a fault will not clear the fault from the keep alive memory
14 Transmission Sump Temperature Exceeding 135°C
The converter lockup clutch will be applied at lower speeds, causing a shudder through the vehicle.
The mode indicator will flash in some vehicles.
These faults can be due to the transmission oil overheating or due to an incorrect signal received from the temperature
sensor.

5A-126 AUTOMATIC TRANSMISSION
Oil Filter and Pan Assembly Notice
1. Replace the filter whenever rebuilding a transmission where a significant amount of mechanical damage hasoccurred.
2. To aid the assembly of the pan gasket, use a small amount of Vaseline at the pan/gasket interface. This ensures that the gasket remains on the pan ridge. Do not over torque pan bolts as this may distort the pan and cause leaks.
3. Ensure that the internal line pressure plus in the valve body is fitted.
To assemble the oil filter and pan assembly (refer to figures 8.63 and 8.64), proceed as follows.
1. Lubricate the oil filter sealing ring with automatic transmission fluid.
2. Carefully assemble the oil filter to the valve body. The spigot must not lean on one side while being fitted. Refer to figure 8.63.
3. Secure the oil falter assembly with the retainer.
4. Check that the magnet is located in the dimple in the comer of the oil pan.
5. Assemble the gasket on the pan lip. The gasket must be free of any distortion when installed.
6. Fit the oil pan assembly to the transmission case and tighten the securing bolts to specification and sequence (refer to figure 8.65). Do not over torque.

CLUTCH 5C-11
5. Unscrew the bolts and remove the clutch cover, pressure
plate and clutch disc. NoticeBe careful not to drop the pressure plate and clutch disc.Installation Notice
Tightening Torque 21 - 27 Nm
6. Installation should follow the removal procedure in the reverse order. Notice
Before installation, clean oil and grease on the flywheel surface.
Do not clean the clutch disc and release bearing insolvent.

TRANSFER CASE (PART TIME 4408) 5D1-3
Cannot Front Wheel Drive when Shifted 4H,4LDIAGNOSIS
Electric Shift Problems
Action
Overhaul and check, replace if necessary. Overhaul and check for wear and damage.
Replace if necessary.
Check sliding parts, replace if necessary.
Checks
Faulty or Damaged TCCU, Speed Sensor, Motor, Clutch or Internal Wirings Damaged or Worn Shift Cam, Hub, Fork and Rail Shift Binding Shift Fork, Hub Collar or Gear
Checks
Broken Drive Chain Action
Check sliding parts, replace if necessary.
Noise in 4WD Operation
Checks
Improper or low oil Loosened bolts or mounted partsNoisy T/C bearing Noisy gears Action
Drain and replace with specified oil. Retighten as specified.Disassemble bearings and parts and check for wear or
damage. Replace if necessary. Check for wear and damage including speedometer
gear, replace if necessary.
Noise in 4H or 4L
Checks
Worn or Damaged Sprockets or Drive Chain
Incorrect Tire Pressure Action
Disassemble and check for wear and damage, replace
if necessary. Adjust tire pressure.
Transfer Case Oil Leakage
Action
Replace the case. Clean case and parts and check for leakage.
Remove breather hose and clean, replace if necessary.Use specified oil and adjust oil level.Retighten Use specified sealant and retighten. Replace
Checks
Cracked Transfer CaseLeakage from Other PartsBreather CloggingImproper or too much OilLoosened Sealing Bolts Improperly Applied Sealant Worn or Damaged Oil Seal

5D1-22 TRANSFER CASE (PART TIME 4408) Cleaning Procedure Notice Before cleaning, check the magnet for thepresence of metal particles which indicate internalchipping of the transfer case.
1. Using cleaning solvent, clean the residual oil and dirtdeposits.Notice
During cleaning, be careful not to damage the metal surfaces.
2. After cleaning, dry the parts with low pressure (Max. 20 psi) compressed air.
3. Lubricate the ball bearings and needle bearings with transfer case oil after cleaning. NoticeProtect the lubricated bearings from dust.
Inspection Procedure
1. Visually check the all removed parts. Notice
Always replace the hose coupling, O-ring and oil seal with new parts.
2. Inspection Terms Burr : Local rise of material forming protruding sharp
edge
Chip : An area from which a small fragment has been
broken off or cut
Crack : Surface break of line nature indicating partial or
complete separation of material.
Excessive wear : Heavy or obvious wear beyond
expectations considering conditions of operation.
Indentation : Displacement of material caused by localized
heavy contact.
Galling : Breakdown of metal surface due to excessive
friction between parts. Particles of the softer materialare torn loose and welded to the harder material.
Nick : Local break or notch, usually displacement of
material rather than loss.
Scoring : Tear or break in metal surface from contact
under abnormal pressure.
Step wear : Heavy wear that produces a step that can
be seen or felt between adjacent contact and noncontactsurfaces.
Uneven wear : Condition of localized, unevenly distributed
wear Includes hollows, shiny spots, uneven polish and other visual indications.

Application
Steering Wheel Steering Gear Box Oil Pump Steering Column
Minmum Turning Radius Oil SECTION 6A
POWER STEERING SYSTEM
TABLE OF CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 6A-1
General Specifications . . . . . . . . . . . . . . . . . . 6A-1
Fastener Tightening Specifications . . . . . . . . . 6A-1
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 6A-2
Hard Steering . . . . . . . . . . . . . . . . . . . . . . . . . 6A-2
Steering Pulls to One Side . . . . . . . . . . . . . . . 6A-2
Excessive Wheel Play . . . . . . . . . . . . . . . . . . . 6A-2
Poor Return of Steering Wheel . . . . . . . . . . . . 6A-2
Steering Wheel Shimmy . . . . . . . . . . . . . . . . . 6A-3
SPECIFICATIONS
GENERAL SPECIFICATIONS Abnormal Noise From Steering System . . . . . 6A-3
Component Locator . . . . . . . . . . . . . . . . . . . 6A-4
Steering System . . . . . . . . . . . . . . . . . . . . . . . 6A-4
Maintenance and Repair . . . . . . . . . . . . . . . 6A-5
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . 6A-5
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6A-5
Oil Pump Pressure Check . . . . . . . . . . . . . . . . 6A-6
Bleeding of Power Steering System . . . . . . . . 6A-6
Steering Gear Box . . . . . . . . . . . . . . . . . . . . . 6A-7
Number of Spoke Outer Diameter
Type Gear Ratio Inner Steering AngleOuter Steering Angle
TypeMaximum Pressure
Upper Tilting Angle
Lower Tilting Angle
Type Capacity Change Interval
Description
4
396 mm
Rack and Pinion

33°37'
31°50' Vane
75-82 kg/cm 2
4.646° 6.969°
5.25m
ATF DEXRON II
1 L
Every 24,000 km
FASTENER TIGHTENING SPECIFICATIONS
Application
Steering Shaft Bolt Pressure Hose BoltReturn Pipe Nut Slotted Nut Steering Gearbox Bolt
N m
30 - 40 12 - 1812 - 1835 - 45 35 - 45

7D-2 FATC-HAVC
Application
Size (WxHxT) Capacity
Type Description
650x339.2x22.0 11,000 Kcal/h
Parallel Flow
Condenser
Application
Material CapacityDesiccant Description
Aluminum 250cc
XH-9 or equivalent 35g
Receiver Drier
Application
Motor Type Motor Size Description
Magnetic
70 x
145
Blower Unit
Application
Replacement Description
Every 10,000 km (replace earlier if air pollution is heavy)
Air Filter
Application
Model
Type
Displacement (cc/rev.) Pulley Oil Description
FK-II(DKV 14C) Vane rotary 140.5
143.0
ZXL 200 PG (PAG Oil)
Compressor
Application
Heater Core Type Heating CapacityHeater Core Size (LxWxT) Description
2 - ROW
4,600 Kcal/h (AT 300CMH)
219.5 X 151.8 X 52
Heater Unit
Application
Type High (OFF)Low (ON) Description
Direct
OFF : 27±2Kgf/cm 2
, DIFF : 6±2Kgf/cm 2
OFF : 1.8±2Kgf/cm 2
, ON : 1.9±0.3Kgf/cm 2
Pressure Switch

INSTRUMENTATION/DRIVER INFORMATION 9E-3
COMBINATION METER
COMPONENT LOCATOR
1. Speedometer
2. Odometer
3. Trip odometer
4. Tachometer
5. Coolant temperature gauge
6. Fuel gauge
7. Low fuel level warning light
8. Turn signal indicator (left)
9. Turn signal indicator (right)
10. Outside rearview mirror & tailgate heating switch
11. Reset button
12. Auto shift indicator*
13. Door open warning light
14. TCS indicator (equipped with ABD)*
21. ABS warning light* 22. EBD warning light*
23. ECS / SPORT warning light*
24. 4 - wheel warning light*
25. 4 - wheel high indicator
26. 4 - wheel low indicator
27. WINTER indicator
28. POWER indicator
29. High beam indicator
15. Alternator warning light
16. Engine oil pressure warning light
17. Brake system warning light
18. Glow indicator light (For Diesel engine)
19. Airbag warning light*
20. Seat belt reminder