Content .. 1019 1020 1021 1022 ..
Mitsubishi Outlander GS45X. Manual - part 1021
ON-VEHICLE SERVICE
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-111
COMPRESSOR NOISE CHECK
M1552008700498
You must first know the conditions when the noise
occurs. These conditions are: 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 disen-
gaged.
Drive belts are speed-sensitive. That is, at different
engine speeds, and depending upon belt tension,
belts can develop unusual noises that are often mis-
taken for mechanical problems within the compres-
sor.
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
).
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
M1552008801391
BLOWER RELAY CONTINUITY CHECK
Battery voltage
Tester connection Specified
condition
Not applied
3
− 4
Open circuit
• Connect
terminal 1 to the
positive battery
terminal
• Connect
terminal 2 to the
negative battery
terminal
3
− 4
Less than 2 ohms
2
3
4
1
def
ay
AC702749AC
Blower relay