Page 2371 of 3870

weather, vehicle speed, in gear or neutral, engine temperature or any other special
conditions. Noises that develop during A/C operation can often be misleading. For example:
what sounds like a failed front bearing or connecting rod, may be caused by loose
bolts, nuts, mounting brackets, or a loose clutch assembly. Verify accessory drive
belt tension (power steering or generator).
Improper accessory drive belt tension can cause a misleading noise when the
compressor is engaged and little or no noise when the compressor is disengaged.
Drive belts are speed-sensitive. That is, at different engine speeds, and depending
upon belt tension, belts can develop unusual noises that are often mistaken for
mechanical problems within the compressor. HANDLING TUBING AND FITTINGS Kinks in the refrigerant tubing or sharp bends in the refrigerant hose lines will
greatly reduce the capacity of the entire system. High pressures are produced in the
system when it is operating. Extreme care must be exercised to make sure that all
connections are pressure tight. Dirt and moisture can enter the system when it is
opened for repair or replacement of lines or components. The following precautions
must be observed. The system must be completely discharged before opening any
fitting of connection in the refrigeration system. Open fittings with caution even
after the system has been discharged. If any pressure is noticed as a fitting is
loosened, allow trapped pressure to bleed off very slowly. Never attempt to rebend formed lines to fit. Use the correct line for the installation
you are servicing. A good rule for the flexible hose lines is keep the radius of all
bends at least 10 times the diameter of the hose.
Sharper bends will reduce the flow of refrigerant. The flexible hose lines should be
routed so that they are at least 80 mm (3.1 inches) from the exhaust manifold. It is
good practice to inspect all flexible hose lines at least once a year to make sure they
are in good condition and properly routed.
On standard
plumbin
g fittin
gs with O-rin
gs, these O-rin
gs are not reusable.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2372 of 3870

ADJUSTMENT 1. Select a quiet area for testing. Duplicate conditions as much as possible.
Switch the compressor on and off several times to clearly identify compressor
noise. To duplicate high ambient conditions (high head pressure), restrict air
flow through the condenser. Install a manifold gauge set to make sure
discharge pressure doesn't exceed 2,070 kPa (300.2 psi).
2. Tighten all compressor mounting bolts, clutch mounting bolt, and compressor
drive belt. Check to assure clutch coil is tight (no rotation or wobble).
3. Check refrigerant hoses for rubbing or interference that can cause unusual
noises.
4. Check refrigerant charge. (Refer to
CHARGING
and
DISCHARGING
).
5. Recheck compressor noise as in Step 1 .
6. If noise still exists, loosen compressor mounting bolts and retighten. Repeat
Step 1 .
7. If noise continues, replace compressor and repeat from Step 1 .
POWER RELAY CHECK FRONT BLOWER RELAY CONTINUITY CHECK
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2691 of 3870
Fig. 9: Removing And Installing Camshaft Position Sensor
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
CRANKSHAFT POSITION SENSOR REMOVAL AND INSTALLATION Pre-removal and Post-installation Operation
Timin
g Belt Lower Cover Removal and Installation
(Refer to TIMING BELT
).
2004 Mitsubishi Endeavor Limited 2004 ENGINE Ignition System - Endeavor
Page 2820 of 3870

YES: Repeat from Step 1 .
NO: The procedure is complete.
INSPECTION PROCEDURE 2: DIFFICULT STEERING WHEEL OPERATION (INSUFFICIENT POWER ASSIST) DIAGNOSIS
STEP 1. Check the drive belt for damage.
Q: Is the drive belt damaged?
YES: Replace the drive belt. Then go to Step 9 .
NO: Go to Step 2.
STEP 2. Check the power steering oil pump drive belt tension.
Refer to 7. DRIVE BELTS (FOR GENERATOR, POWER STEERING OIL PUMP AND AIR CONDITIONING) (CHECK)
.
Q: Is the power steering oil pump drive belt tension within the standard
value?
YES: Go to Step 3.
NO: Adjust the tension. (Refer to 7. DRIVE BELTS (FOR
GENERATOR, POWER STEERING OIL PUMP AND AIR CONDITIONING) (CHECK)
). Then go to Step 9 .
STEP 3. Check the fluid level.
1. Park the vehicle on a flat, level surface, and then start the engine.
2. Turn the steering wheel several times to raise the temperature of the fluid
to approximately 50 - 60°C (122 - 140°F).
3. With the engine running, turn the wheel all the way to the left and right
several times.
4. Check the fluid in the oil reservoir for foaming or milkiness. Check the
difference of the fluid level when the engine is stopped, and while it is
running.
Q: Is the check result OK?
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor
Page 2826 of 3870
Q: Is there noise?
YES: Repeat from Step 1 .
NO: The procedure is complete.
INSPECTION PROCEDURE 5: SQUEALING NOISE DIAGNOSIS
STEP 1. Check the drive belt tension.
Refer to 7. DRIVE BELTS (FOR GENERATOR, POWER STEERING OIL PUMP AND AIR CONDITIONING) (CHECK)
.
Q: Is the drive belt tension incorrect?
YES: Adjust the belt tension. (Refer to 7. DRIVE BELTS (FOR
GENERATOR, POWER STEERING OIL PUMP AND AIR CONDITIONING) (CHECK)
). Then go to Step 3 .
NO: Go to Step 2.
STEP 2. Check for seizure in the oil pump.
Q: Is there seizure?
YES: Replace the part. Then go to Step 3.
NO: Go to Step 3.
STEP 3. Retest the system.
Confirm that no noise is generated.
Q: Is there noise?
YES: Repeat from Step 1 .
NO: The procedure is complete.
INSPECTION PROCEDURE 6: HISSING NOISE DIAGNOSIS
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor
Page 2853 of 3870
Fig. 21: Checking Steering Wheel Return To Center
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
DRIVE BELT TENSION CHECK Refer to 7. DRIVE BELTS (FOR GENERATOR, POWER STEERING OIL PUMP AND AIR CONDITIONING) (CHECK)
.
FLUID LEVEL CHECK
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor
Page 2909 of 3870
Fig. 66: Installing Suction Hose
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
INSPECTION
Check the drive belt for cracks. Check the pulley for uneven rotation.
POWER STEERING HOSES REMOVAL AND INSTALLATION
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor
Page 3089 of 3870
Fig. 1: Removing/Installing Front Seat
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
INSTALLATION SERVICE POINT >>A<< FRONT SEAT ASSEMBLY INSTALLATION
CAUTION: Install the front passenger's seat assembly before
installing the outer seat belt. < Vehicles with
advanced air bag>
2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Front & Rear Seat Assembly - Endeavor