Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 695

MANUAL A/C DIAGNOSIS

TSB Revision

HEATING AND AIR CONDITIONING

55-17

STEP 3. Check the harness wire between the compressor
connector B-18 and automatic compressor controller
connector C-13.
Q: Is the harness wire between the compressor connector

B-18 and automatic compressor controller connector C-
13 in good condition?
YES : Go to Step 4.
NO : Repair. Then go to Step 4.

STEP 4. Measure the automatic compressor controller
terminal voltage.
Refer to

P.55-18

.

Q: Is the automatic compressor controller terminal voltage

in good condition?
YES : Go to Step 5.
NO : Replace. Then go to Step 5.

STEP 5. Check symptoms.

Q: Does the A/C indicator flashes?

YES : Go to Step 1.
NO : This diagnosis is complete. (If no malfunctions are not

found in all steps, an intermittent malfunction is
suspected. Refer to GROUP 00E, How to Use
Troubleshooting/Inspection Service Points

−

How to

Cope with Intermittent Malfunction

P.00-6

.)

AC003666 AB

CONNECTOR: B-18

AC002282AE

CONNECTOR: C-13

MANUAL A/C DIAGNOSIS

TSB Revision

HEATING AND AIR CONDITIONING

55-18

CHECK AT ECU TERMINAL

M1552010300077

1

2 3 4 5 6

7 8

9 10

11 12 13 14 15 16 17 18 19 20

21 22 23 24

25 26 27 28

AC002292AB

TERMINAL
NO.

CHECK ITEM

CHECKING REQUIREMENTS

NORMAL CONDITION

1

Power supply

Ignition switch: "LOCK" (OFF)

0 V

Ignition switch: "ON"

Battery positive voltage

2

Input from thermistor sensor to
controller

Ignition switch and A/C switch:
OFF

0 V

Ignition switch and A/C switch:
ON

2

−

5 V

3

Thermistor sensor power supply Ignition switch and A/C switch:

OFF

0 V

Ignition switch and A/C switch:
ON

5 V

4, 5

Output from controller to
engine control module <M/T>/
powertrain control module
<A/T>

Air thermistor sensor detection
temperature: 5

°

C (41.0

°

F) or

less

0 V

Air thermistor sensor detection
temperature: 55C (46.45F) or
less

Battery positive voltage

6

-

-

-

7

Input from A/C switch (outside/
inside air selection damper
control switch) to controller

•

Outside air switch: ON

•

Inside air switch: OFF

0 V

•

Outside air switch: OFF

•

Inside air switch: ON

Battery positive voltage

8

Input from defroster switch
(FOOT) to controller

Defroster switch (FOOT): ON

0 V

Defroster switch (FOOT): OFF

Battery positive voltage

9

Input from defroster switch
(DEF) to controller

Defroster switch (DEF): ON

0 V

Defroster switch (DEF): OFF

Battery positive voltage

10Input from A/C switch to

controller

A/C switch: OFF

0 V

A/C switch: ON

Battery positive voltage

11

Ground

Always

0 V

12

-

-

-

13

Input from A/C switch (outside/
inside air selection damper
control switch) to controller

•

Outside air switch: ON

•

Inside air switch: OFF

Battery positive voltage

•

Outside air switch: OFF

•

Inside air switch: ON

0 V

14

Input from A/C switch (IND) to
controller

A/C switch: OFF

0 V

A/C switch: ON

Battery positive voltage

15

-

-

-

MANUAL A/C DIAGNOSIS

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HEATING AND AIR CONDITIONING

55-19

TROUBLESHOOTING HINT

M1552013400040

Condenser fan and radiator fan control

•

Refer to GROUP 14, Diagnosis

−

Symptom

Chart

P.14-3

.

Compressor control

•

Refer to

P.55-3

.

16

Output from controller to
outside/inside air selection
damper control motor

•

Outside air switch: ON

•

Inside air switch: OFF

Battery positive voltage

•

Outside air switch: OFF

•

Inside air switch: ON

0 V

17

Output from controller to
outside/inside air selection
damper control motor

•

Outside air switch: ON

•

Inside air switch: OFF

0 V

•

Outside air switch: OFF

•

Inside air switch: ON

Battery positive voltage

18

Input from taillight relay to
controller

Taillight relay: OFF

0 V

Taillight relay: ON

Battery positive voltage

19

Input from blower switch (LO) to
controller

Blower switch (LO): OFF

0 V

Blower switch (LO): ON

Battery positive voltage

20

-

-

-

21

Input from A/C compressor
relay to controller

A/C compressor relay: OFF

0 V

A/C compressor relay: ON

Battery positive voltage

22

Input from distributor assembly
to controller

Ignition switch: "LOCK" (OFF)

0 V

Ignition switch: "ON" (engine
stopped)

Battery positive voltage

Ignition switch: "ON" (engine
stopped)

0 V

−

Battery positive

voltage

23

Revolution pick-up sensor
power supply

Ignition switch and A/C switch:
OFF

0 V

Ignition switch and A/C switch:
ON

5 V

24

Input from revolution pick-up
sensor relay to controller

A/C compressor relay: OFF

0 V

A/C compressor relay: ON

2

−

5 V

TERMINAL
NO.

CHECK ITEM

CHECKING REQUIREMENTS

NORMAL CONDITION

SPECIAL TOOLS

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HEATING AND AIR CONDITIONING

55-20

SPECIA L TO O LS

M1552000600088

O N -VEH IC LE SERVIC E

REFRIGERANT LEVEL TEST

M1552008400066

Use the refrigerant recovery station to remove all of the
refrigerant, and then calculate the amount of the refrigerant and
charge it.

MAGNETIC CLUTCH TEST

M1552008500085

1. Disconnect the magnetic clutch connector to the magnetic

clutch.

2. Connect positive battery voltage directly to the connector for

the magnetic clutch.

3. If the magnetic clutch is normal, there will be "click." If the

pullet and armature do not make contact ("click"), there is a
malfunction.

TOOL

TOOL NUMBER AND
NAME

REPLACED BY MILLER
TOOL NUMBER

APPLICATION

MB991367
Special spanner

MB991367-01

Armature mounting nut of
compressor removal and
installation

MB991386
Pin

MIT217213

Armature mounting nut of
compressor removal and
installation

B991367

AC001367

1 2

3 4

AB

<2.4L ENGINE>

<3.0L ENGINE>

MAGNETIC CLUTCH
CONNECTOR

MAGNETIC CLUTCH
CONNECTOR