Page 860 of 1500
MOTORS AND TRANSISTOR
HEATER, AIR CONDITIONING AND VENTILATION55-159
.
BLOWER FAN AND MOTOR CHECK
When battery voltage is applied between the terminals, check
that the motor operates. Also, check that there is no abnormal
noise.LEVER POSITION BATTERY
CONNECTIONLEVER
OPERATION
At the inside
position
Connect
terminal 1 to the
positive battery
terminal
Connect
terminal 7 to the
negative battery
terminalThe lever moves
from the outside
position to the
inside position
At the outside
position
Connect
terminal 1 to the
positive battery
terminal
Connect
terminal 5 to the
negative battery
terminalThe lever moves
from the inside
position to the
outside position
Page 861 of 1500
SENSORS
HEATER, AIR CONDITIONING AND VENTILATION55-160
SENSORS
REMOVAL AND INSTALLATIONM1554001900088
Required Special Tools:
: Diagnostic Tool (MUT-III Sub Assembly)
MB991824: Vehicle Communication Interface
(V.C.I.)
MB991827: MUT-III USB Cable
MB991910: MUT-III Main Harness A
INTERIOR TEMPERATURE
SENSOR REMOVAL STEPS
LOWER PANEL (REFER TO
GROUP 52A, INSTRUMENT
PA N E L P.52A-4).
1. INTERIOR TEMPERATURE
SENSOR
2. ASPIRATOR HOSEPHOTO SENSOR REMOVAL
STEPS
3. PHOTO SENSOR
Page 862 of 1500
SENSORS
HEATER, AIR CONDITIONING AND VENTILATION55-161
INSPECTIONM1554002000130.
INTERIOR TEMPERATURE SENSOR CHECK
When the resistance between the sensor terminals is mea-
sured under two or more temperature conditions, the resis-
tance should approximately satisfy the illustrated values.
NOTE:
The temperature conditions when checking should not
exceed the range shown in the diagram.
.
PHOTO SENSOR CHECK
1. Connect diagnostic tool , and check the data list of the
photo sensor. (Refer to P.55-133)
2. Check that the displayed value changes when you cover
the photo sensor with your hands.
Page 863 of 1500
Page 864 of 1500
AMBIENT TEMPERATURE SENSOR
HEATER, AIR CONDITIONING AND VENTILATION55-163
INSPECTIONM1551006300349.
AMBIENT AIR TEMPERATURE SENSOR CHECK
The ambient air temperature sensor should be checked
without removing it from bumper. If the sensor is removed,
damage will occur to clip rendering it unserviceable.
Measure the resistance between the sensor terminals under at
least two temperatures. The resistance values should meet the
values shown.
NOTE: The temperature should be within the shown range.
Page 865 of 1500
Page 866 of 1500
COMPRESSOR ASSEMBLY AND DRIVE BELT
HEATER, AIR CONDITIONING AND VENTILATION55-165
REMOVAL SERVICE POINTS
.
<> FLEXIBLE SUCTION HOSE AND FLEXIBLE
DISCHARGE HOSE DISCONNECTION
As the compressor oil and receiver are highly moisture
absorbent, use a non-porous material to plug the hose and
nipples.
To prevent the entry of dust or other foreign bodies, plug the
dismantled hoses and compressor nipples.
.
<> COMPRESSOR REMOVAL
Take care not to spill any compressor oil when removing the
compressor.
INSTALLATION SERVICE POINT
.
>>A<< FLEXIBLE SUCTION HOSE CONNECTION
To prevent mis-alignment of suction hose to bracket use the
folowing assembly procedure.
1. Insert hoseconnector into compressor and hand start bolt.
2. Assemble P-clip to hose and suction hose bracket. Tighten
bolt.
3. Tighten bolt between compressor and hose connector.
.
>>B<< COMPRESSOR INSTALLATION
If a new compressor is installed, first adjust the amount of oil
according to the procedures described below, and then install
the compressor.
1. Measure the amount (X ml) of oil within the removed
compressor.
2. Drain (from the new compressor) the amount of oil
calculated according to the following formula, and then
install the new compressor.
New compressor oil amount = 140 ml
140 ml
X ml = Y ml
NOTE: Y ml indicates the amount of oil in the refrigerant line,
the condenser, the evaporator, etc.
NOTE: When replacing the following parts at the same times as
the compressor, subtract the rated oil amount of each part from
Y ml and discharge from the new compressor.
Compressor oil: ND Oil 8
Quantity:
Evaporator: 40 ml
Condenser: 40 ml
Receiver: 40 ml
Page 867 of 1500
COMPRESSOR ASSEMBLY AND DRIVE BELT
HEATER, AIR CONDITIONING AND VENTILATION55-166
INSPECTIONM1552014301083
COMPRESSOR AIR CONDITIONING
COMPRESSOR CLUTCH OPERATION CHECK
Connect the compressor connector terminal to the battery posi-
tive (+) terminal and ground the battery’s negative (-) terminal
to the compressor unit. At that time, the air conditioning com-
pressor clutch should make a definite operating sound.
.
AIR GAP ADJUSTMENT
Check whether or not the air gap of the clutch is within the stan-
dard value.
Standard value:
0.35
0.60mm
NOTE: If there is a deviation of the air gap from the standard
value, assess the operation of the clutch and replace the com-
pressor assembly as required.
