Mitsubishi Evolution X. Manual - part 1289

AUTO A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-107

In/out air c/o SW light

90

−

Displays the status of the 
inside air/outside air 
changeover switch indicator.

A/C Compressor drive flag

91

−

ON when the compressor is 
activated.

Wiper operation flag

92

−

ON when the wiper is 
operated.

Ignition position information

93

−

Ignition switch position 
status

Power source voltage

94

−

Displays power supply 
voltage.

IOD fuse equipment flag

95

−

IOD fuse status

A/T lock up open request

96

−

Displays A/T lock open 
request signal.

System operation time

100

−

−

Compressor use times

101

−

−

Rear defogger use times

102

−

−

In/out air c/o poten drive time

103

−

−

Air outlet c/o poten drive time

104

−

−

Air mix potentiometer drive 
time

105

−

−

Hot state time (Interior TEMP.) 106

−

−

Cold state time (Interior 
TEMP.)

107

−

−

Hot state time (Ambient 
TEMP.)

108

−

−

Cold state time (Ambient 
TEMP.)

109

−

−

Maximum ambient 
temperature

110

−

−

Minimum ambient temperature 111

−

−

Maximum Engine coolant 
TEMP.

112

−

−

Engine high speed time

113

−

−

Maximum Engine speed

114

−

−

High pressure drive time

115

−

−

High pressure cut times

116

−

−

Maximum pressure (kPa)

117

−

−

A/C use rate

118

−

−

Compressor operation rate

119

−

−

Eco operation rate

120

−

−

Scan tool display

Item 
No.

Inspection status

The display content under 
normal condition

AUTO A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-108

NOTE: 

*

 shows that it is displayed but not used.

Recirc use rate

121

−

−

A/C operation times

122

−

−

In/out air c/o operation times

123

−

−

Mode dial operation times

124

−

−

Blower fan dial operation 
times

125

−

−

TEMP. set dial operation times 126

−

−

FACE mode use rate

127

−

−

B/L mode use rate

128

−

−

FOOT mode use rate

129

−

−

D/F mode use rate

130

−

−

DEF mode use rate

131

−

−

Fan OFF use rate

132

−

−

Fan 1-2step use rate

133

−

−

Fan 3-4step use rate

134

−

−

Fan 5-6step use rate

135

−

−

Fan 7-8step use rate

136

−

−

Temp 1-7 step use rate

137

−

−

Temp 8-10step use rate

138

−

−

Temp 11-13 step use rate

139

−

−

Temp 17-19step use rate

140

−

−

Temp 20-22step use rate

141

−

−

Temp 23-29step use rate

142

−

−

PTC heater1 use times

143

−

−

PTC heater2 use times

144

−

−

PTC heater3 use times

145

−

−

Fan LO driving time

146

−

−

Fan M1 driving time

147

−

−

Fan M2 driving time

148

−

−

Fan HI driving time

149

−

−

Rear PTC heater counter

150

−

−

Scan tool display

Item 
No.

Inspection status

The display content under 
normal condition

AUTO A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-109

ACTUATOR TEST

M1554005200780

CHECK AT A/C-ECU TERMINAL

M1552010301519

Item No.

Check item

Driven content

2

idle up request

Idle-up request signal

5

In/out select damper

The moving position of outside/inside air 
selection damper motor

6

Air mix damper motor

The moving position of air mix damper 
motor

7

Front blower fan

The amount of blower motor rotation

8

Air outlet c/o damper

Air outlet changeover damper motor 
moving position

10

Condenser fan

The amount of condenser fan rotation

11

Air conditioning switch

A/C switch selection position

12

Rear defogger switch

Rear window defogger switch selection 
position

13

A/T lock up open request

A/T lock open request signal

8

2

1

5

3 4

6 7

9 10

20

19

18

17

16

15

14

13

12

11

32

24

29

21

31

30

2223

27

35

33

25

34

26

36

28

AC210339

C-22

C-20

AG

Terminal 
No.

Check item

Check condition

Normal condition

1

Power transistor (DRAIN)

Air volume control dial: Maximum air 
volume

0 to 2 V

2

Power transistor (GATE)

Air volume control dial: Maximum air 
volume

Battery voltage

3 

− 8

−

−

−

9

A/C control panel (input)

−

−

10

A/C control panel (input)

 

−

−

11, 12

−

−

−

13

Battery power supply

 Always

Battery voltage

14

Ground

 Always

0 V

15

IG1 power supply

Ignition switch: IG1

Battery voltage

16

A/C pressure sensor input

Refer to 

P.55-113

.

Refer to 

P.55-113

.

17

Interior temperature sensor

Sensor probe temperature: 25

° C 

(77

° F) (4.0 kΩ)

2.1 to 2.7 V

18

−

−

−

19

Sensor ground

Always

0 V

AUTO A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-110

20

A/C pressure sensor power 
supply

Ignition switch: IG2

5 V

21

Air thermo sensor ground

Always

0 V

22

Air thermo sensor

Sensor probe temperature: 25

° C 

(77

° F) (4.0 kΩ)

2.1 to 2.7 V

23

−

−

−

24

Motor for air outside/inside 
air circulation switching 
damper

−

−

25

Motor for air outside/inside 
air circulation switching 
damper

−

−

26

Motor for air outside/inside 
air circulation switching 
damper

−

−

27

Motor for air outside/inside 
air circulation switching 
damper

−

−

28

Air mix damper motor

−

−

29

Motor power supply

−

−

30

Air outlet changeover 
damper motor

−

−

31

Air outlet changeover 
damper motor

−

−

32

Air outlet changeover 
damper motor

−

−

33

Air outlet changeover 
damper motor

−

−

34

Air mix damper motor

−

−

35

Air mix damper motor

−

−

36

Air mix damper motor

−

−

Terminal 
No.

Check item

Check condition

Normal condition