Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual - part 698

HEATER CONTROL ASSEMBLY AND A/C SWITCH

TSB Revision

HEATING AND AIR CONDITIONING

55-29

INSPECTION

M1552002500032

DEFROSTER SWITCH CONTINUITY CHECK

BLOWER SWITCH ASSEMBLY CONTINUITY 
CHECK

1. BLOWER SWITCH

2. A/C SWITCH

3. INSIDE/OUTSIDE AIR CHANGEOVER SWITCH

AIR OUTLET 
CHANGEOVER 
CONTROL KNOB 
POSITION

TESTER 
CONNECTION 

SPECIFIED 
CONDITION

DEFROSTER, 
DEFROSTER/
FOOT

2-3

Less than two ohm

OTHER POSITION 1-3

Less than two ohm

AC001398

HEATER
CONTROL
ASSEMBLY

AB

SWITCH 
POSITION

TESTER 
CONNECTION
(CONNECTOR A) 

SPECIFIED 
CONDITION

0 (OFF)

-

Open circuit

1 (LO)

3-5

Less than two ohm

2 (ML)

1-3

Less than two ohm

3 (MH)

3-6

Less than two ohm

4 (HI)

3-4

Less than two ohm

SWITCH 
POSITION

TESTER 
CONNECTION
(CONNECTOR B) 

SPECIFIED 
CONDITION

Off

-

Open circuit

On

5-6

Less than two ohm

SWITCH 
POSITION

TESTER 
CONNECTION
(CONNECTOR B) 

SPECIFIED 
CONDITION

Inside air

-

Open circuit

Outside air

4-5

Continuity

AC001399

CONNECTOR A

CONECTOR B

OFF

ON

OFF

ON

A/C SWITCH

AB

HEATER UNIT, HEATER CORE, BLOWER ASSEMBLY, EVAPORATOR UNIT

TSB Revision

HEATING AND AIR CONDITIONING

55-30

HEATER  U NIT, H EATER C O R E, B LO W ER  ASSEM B LY, 

EVA PO R ATO R  U NIT

M1552011600037

REMOVAL AND INSTALLATION

WARNING

When removing and installing the heater unit, do not let it bump against the SRS-ECU or the 
components.

Pre-removal and Post-installation Operation

•

Front Driver's Side Under Cover, Center Panel 
Assembly, Glove Box and Front Passenger's 
Side Under Cover Removal and Installation 
(Refer to GROUP 52A, Instrument Panel 

P.52A-

4

.)

•

Joint Duct Removal and Installation (Refer to 

P.55-32

.)

AC001400

1

2

3

4

5

6

7

8

9

10

N

AB

PIPING CONNECTOR

O-RING

COMPRESSOR OIL: 
SUN PAG 56

REMOVAL STEPS

1.

AUTOMATIC COMPRESSOR 
CONTROLLER <VEHICLES 
WITH A/C>

•

REFRIGERANT DISCHARGING 
AND CHARGING <VEHICLES 
WITH A/C> (REFER TO 

P.55-21

.)

<<A>>

2.

A/C PIPE <VEHICLES WITH A/
C>

3.

EXPANSION VALVE

4.

O-RING <VEHICLES WITH A/C>

>>A<<

5.

EVAPORATOR

6.

THERMISTOR SENSOR

7.

DRAIN HOSE <VEHICLES WITH 
A/C>

•

ENGINE COOLANT DRAINING 
AND REFILLING [REFER TO 
GROUP 00E, MAINTENANCE 
SERVICE - ENGINE COOLANT 
(CHANGE) 

P.00-52

.]

8.

HEATER HOSE

•

RADIO AND TAPE PLAYER 
(REFER TO GROUP 54A, AUDIO 
SYSTEM - RADIO, TAPE 
PLAYER, CD PLAYER AND CD 
AUTO CHANGER 

P.54A-180

.)

•

HEATER CONTROL ASSEMBLY 
(REFER TO 

P.55-26

.)

•

INSTRUMENT PANEL 
ASSEMBLY (REFER TO GROUP 
52A, INSTRUMENT 
PANEL

P.52A-4

.)

•

FRONT DECK CROSSMEMBER

REMOVAL STEPS (Continued)

HEATER UNIT, HEATER CORE, BLOWER ASSEMBLY, EVAPORATOR UNIT

TSB Revision

HEATING AND AIR CONDITIONING

55-31

REMOVAL SERVICE POINT

<<A>> A/C PIPE REMOVAL

CAUTION

Seal the pipes completely, otherwise the compressor oil 
and receiver will absorb water vapor easily, possibly 
damaging the compressor and deteriorating performance.
Plug the disconnected pipe and the evaporator nipple to 
prevent foreign material from getting into them.

INSTALLATION SERVICE POINT

>>A<< EVAPORATOR INSTALLATION
When replacing the evaporator, refill with a specified amount of 
compressor oil and install it.

Compressor oil: SUN PAG 56

Quantity: 60 cm

3

 (2.0 floz)

•

FLOOR CONSOLE (REFER TO 
GROUP 52A, FLOOR CONSOLE 

P.52A-9

.)

•

INSTRUMENT PANEL CENTER 
REINFORCEMENT (REFER TO 
GROUP 52A, INSTRUMENT 
PANEL 

P.52A-4

.)

•

FOOT DUCT (LH/RH) (REFER 
TO 

P.55-44

.)

9.

HEATER/COOLER UNIT

10. HEATER CORE

REMOVAL STEPS (Continued)

BLOWER ASSEMBLY AND RESISTOR

TSB Revision

HEATING AND AIR CONDITIONING

55-32

B LO W ER A SSEM B LY A N D  RESISTO R

M1551002800063

REMOVAL AND INSTALLATION

INSPECTION

M1551002900060

RESISTOR CHECK

Use an ohmmeter to measure the resistance between the 
terminals. Check that the measured value is at the standard 
value.

Standard value:

AC001401

1

2

3

4

5

5

6

6

7

(MOVING
PARTS)

AB

REMOVAL STEPS

•

GLOVE BOX (OUTER AND 
INNER) (REFER TO GROUP 52A, 
INSTRUMENT PANEL 

P.52A-4

.)

1.

AIR PURIFIER ASSEMBLY

2.

JOINT DUCT

3.

RESISTOR

4.

BLOWER FAN AND MOTOR

5.

INSIDE/OUTSIDE AIR 
CHANGEOVER DAMPER 
MOTOR

6.

BLOWER ASSEMBLY

7.

BLOWER DUCT

REMOVAL STEPS (Continued)

MEASUREMENT TERMINAL

STANDARD VALUE 

Ω

Between terminals 3 and 2 (LO)

2.3

Between terminals 3 and 4 (ML)

1.1

Between terminals 3 and 1 (MH)

0.4

AC001402AB