1991 MITSUBISHI ECLIPSE Service Manual

HEATERS AND AIR CONDITIONING - Service Adjustment Procedures 24-25
16A1077
20AO499
CONDENSER FAN MOTOR HIGH-LOW SELECTING RELAYCheck for continuity between the
term,inals when the battery
power-supply is applied to terminal
(5), and terminal (3) is
grounded.
IWhen current flows1 Between terminals l-2 1 Continuity1When no current
flows
IDLE-UP OPERATION CHECKN24FoAA
(I) Before inspection and adjustment set vehicle in the
following condition:
l Engine coolant temperature:
80-90°C (176-194°F)
lLights, electric cooling fan and accessories: Set to OFFl Transaxle: Neutral
(N or P for vehicles with A/T)l Steering wheel: Straightforward
(2) Check whether or not the idling speed is the standard
value.Standard value:
4.8L Engine>700 rpm
<2.0L DOHC Engine>750 rpm
NOTE
There is no necessity to make an adjustment, because theidling speed is automatically adjusted by the
ISC” system.
If, however, there occurs a deviation from the standard
value for some reason, check the
ISC” system.
(3) Check to be sure that the idlig speed becomes the standardvalue when the air conditioner switch is switched ON and
the air conditioner is activated.
Standard value: 850 rpm
NOTE
There is no necessity to make an adjustment, because theidling speed is automatically adjusted by the
ISC” system.
If, however, there occurs a deviation from the standard
value for some reason, check the
ISC” system.
ISC: Idle Speed Control

24-26HEATERS AND AIR CONDITIONING - Heater Control AssemblyHEATER CONTROL ASSEMBLY
REMOVAL AND INSTALLATIONRemoval steps
1. Stopper2. Glove box assemblyl +3. Connection for the air-selection controlwire
4. Dial knob
l *;: CI.Z;Er air outlet assembly
7. Cluster panel assembly (A)
8. Cluster panel assembly(B)
9. Plug
10. Knee protecter11. Hood lock release handle
12. Shower duct, LH
13. Lap cooler duct
l + 14. Connection for the mode control wire
l * 15. Connection for the temperature controlwire
16. Heater control assembly4
6
2OAO430Pre-removal Operation
@Removal of Radio and Tape Player(Refer to GROUP 8-Audio System.)
(Refer to GROUP
8-Audio System.)
NOTE(1) Reverse the removal procedures to reinstall.(2) 4e : Refer to “Service Points of Removal”.(3) l 4 : Refer to “Service Points of Installation”.

HEATERS AND AIR CONDITIONING - Heater Control Assembly24-27
lQA0274
20A0408
SERVICE POINTS OF REMOVALN24GBAL
5. REMOVAL OF CENTER AIR OUTLET ASSEMBLY
Disengaging the tabs of the center air outlet assembly witha flat tip (-1 screwdriver, remove the center air outlet
assembly with a plastic trim tool.
INSPECTION
BLOWER SWITCHN24GCAG
Operate the switch, and check the continuity between the
terminals.
Termina’53627814
OFFl (Low)
o--o
o---o
o (Medium first step)0f-le-0
0 (Medium second step)0-0
0 (High)0 1I
Ilo oln
NOTED0 indicates that there is continuity between the terminals.

24-28HEATERS AND AIR CONDITIONING - Heater Control Assembly
II
IT20AO409
SERVICE POINTS OF INSTALLATIONN24GOAO
15. INSTALLATION OF TEMPERATURE CONTROL WIRE
Connect the temperature control wire to the blend air
damper lever by following the steps below.
(1) Move the temperature control lever to the rightmost
position. (“HOT” position)
(2) With the blend air damper lever pressed completely
downward in the direction indicated by the arrow,
connect the inner cable of the temperature control wireto the end of the blend air damper lever, and then
secure the outer cable by using a clip.
14. INSTALLATION OF MODE SELECTION CONTROL WIREConnect the mode selection control wire to the mode
selection damper lever by following the steps below.
(1) Move the mode selection lever to the $$ position.
(2) With the mode selection damper lever pressed inward
in the direction indicated by the arrow, connect the
inner cable of the mode selection control wire to the
end of the mode selection lever, and then secure the
outer cable by using a clip.
3. INSTALLATlON OF AIR SELECTION CONTROL WIRE
Connect the air selection control wire to the air selection
damper lever by following the steps below.
(1) Move the air selection control lever to the
& posi-
tion.(2) With the air selection damper lever pressed inward in
the direction indicated by the arrow, connect the inner
cable of the air selection control wire to the end of the
air selection lever, and then secure the outer cable by
using a clip.

HEATERS AND AIR CONDITIONING - Resistor
RESISTOR
rREMOVAL AND INSTALLATIONRemoval steps
20A0447
1. Stopper
2. Connector for the resistor
3. Resistor
NOTEReverse the removal procedures to reinstall.
INSPECTION
RESISTOR CHECK
N2UCAC(1) Remove the stopper and tilt the glove box downward and
forward.(2) Disconnect the connector for the resistor.
(3) Using a circuit tester, measure the resistance between the
terminals indicated below.
The condition can be considered satisfactory if the value
measured at this time is equivalent to the standard value.
Standard value
Terminals measuredStandard value PBetween terminals
O-0Approx. 1.7- ‘I .96Between terminals @-@I
Approx.
0.81-0.93Between terminals
0-0Approx. 0.29-0.33
20A0448

24-30HEATERS AND AIR CONDITIONING - Air Conditioner SwitchAIR CONDITIONER SWITCH
REMOVAL AND--N24OA..INSTALLATION
-2OAO419al Operationof
R;tdio and TanePlaver@Removal -..--._ _.-.-, -Removal steps
I. Air conditioner switch connectorCL7 Air rnnditinner switch
l Installation of Radio and Tape Player(Refer to GROUP 8-Audio System.)
NOTEOperation /Reverse
removal orocedures to reinstall.
I
77-. , .,a -.,a ,-,..-,.-. -.....,. ,.._._.__ _..- .-...-.-.r----- --
-----A
20A0427
20A0199
SERVICE POINTS OF REMOVALN24QBAF2. REMOVAL OF AIR CONDITIONER SWITCH
Remove the radio set, and insert hand to the back of the
cluster panel assembly through the produced opening.
Catching the air conditioner switch on the right and left
sides, push it toward you for removal.
INSPECTIONN24OCACaAIR CONDITIONER SWITCH CHECK
(1) Remove the heater control panel.
(2) Remove the connector for the air conditioner switch, and
then check for continuity as described below.
NOTE(1) The 0-0 symbol indicates continuity.
(2) The broken line (-----) indicates the connection
during ECONOMY use.
(3) The chain line
(- -----) indicates the connection
during air conditioner use.

HEATERS AND AIR CONDITIONING - Heater Unit24-31
HEATER UNIT
REMOVAL AND INSTALLATIONN24m-
Pre-removal OperationeDraining of Engine Coolant(Refer to GROUP 7-Service Adjust-ment Procedures.)
@Removal of Floor Console and In-
strument Panel
(Refer to GROUP 23-Floor Consoleand Instrument Panel.)Post-installation Operation
*Supplying of Coolant
(Refer to GROUP 7-Service Adjust-ment Procedures.)
l installation of Floor Console and
Instrument Panel
(Refer to GROUP 23-Floor Consoleand Instrument Panel.)


shower duct>
Jshower duct>
Removal steps
1. Center reinforcement
2. Shower duct (R.H.)
3. Distribution foot duct
;: ;Z;;er duct assembly
:z6. Evaporator
7. Heater unit
8. Lap cooler duct (A)
NOTE(1) Reverse the removal procedures to reinstall.(2) 4* : Refer to “Service Points of Removal”.

24-32HEATERS AND AIR CONDITIONING - Heater Unit
SERVICE POINTS OF REMOVAL6. REMOVAL OF
EVAPORATERRefer to GROUP 24-34.
NMISAO
20A04177. REMOVAL OF HEATER UNIT

NOTEIn order to prevent bolts from falling into the blower
assembly, set the inside/outside air-selection damper to
the position that permits outside air introduction.
INSPECTIONN24lcAal Check the operation of dampers and link mechanism.
l Check the heater core for clogging and water leakage.
HEATER CORE REPLACEMENT
(1) Remove the heater unit.
(2) Remove the plate.N24lDAH
(3) Pull out the heater core from the heater unit.
(4) Insert the heater core into the heater unit.
NOTEThis work must be done carefully so as not to damage the
fin part or the pad part.
(5)
Install the plate.
(6) Install the heater unit.