Mitsubishi Outlander GS45X. Manual - part 1030

 

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Mitsubishi Outlander GS45X. Manual - part 1030

 

 

AUTOMATIC A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-11

STEP 4. Check the wiring harness between A/C-ECU 
connector C-109 (terminals 17 and 19) and interior 
temperature sensor connector C-122 (terminals 2 and 1).

• Check the sensor signal line and ground line for open and 

short circuit.

Q: Is the wiring harness between A/C-ECU connector 

C-109 (terminals 17 and 19) and interior temperature 
sensor connector C-122 (terminals 2 and 1) in good 
condition?
YES : 
Go to Step 5.
NO :  Repair the wiring harness.

STEP 5. Check the interior temperature sensor.
Measure the resistance between connector terminals 1 and 2 
under at least two different temperatures. The resistance val-
ues should generally match those in the graph. 
NOTE: The temperature at the check should not exceed the 
range in the graph. 
Q: Is the interior temperature sensor in good condition?

YES : Replace the A/C-ECU. Then go to Step 6.
NO :  Replace the interior temperature sensor. Then go to 

Step 6.

STEP 6. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Connect scan tool MB991958 to the data link connector
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?

YES : The procedure is complete.
NO :  Return to Step 1.

AC702920

20

15

10

5

0

-10
(14)

0
(32)

20
(68)

10
(50)

30
(86)

40
(104)

AB

RESISTANCE

TEMPERATURE ˚C (˚F)

AUTOMATIC A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-12

SYMPTOM CHART

M1554005000786

CAUTION

During diagnosis, a DTC code associated with 
another system may be set when the ignition 
switch is turned on with connector(s) discon-
nected. On completion, confirm all systems for 
DTC code(s). If DTC code(s) are set, erase them 
all.

DATA LIST REFERENCE TABLE

M1554005100493

Symptom

Inspection 
procedure

Reference 
page

When the A/C is operation, temperature inside the passenger 
compartment does not decrease (Cool air is not emitted).

1

Refer to 
GRUOP 55A, 
symptom chart 

P.55A-63

Malfunction of the A/C power supply system.

2

The compressor does not work.

3

Blower fan and motor do not turn.

4

Blower air amount cannot be changed.

5

Outside/inside air changeover is not possible.

6

A/C outlet air temperature does not increase.

7

Air outlet vent cannot be changed.

8

Rear window defogger does not operate.

9

Blower motor power supply system.

10

Item No.

Check items

Inspection status

The display 
contents under 
normal 
conditions

17

Engine speed

Displays correct 
engine speed.

19

Ambient temperature 
sensor

Ambient 
temperature is the 
same as scan tool 
displayed 
temperature

20

Air thermo sensor

Evaporator outlet 
temperature is the 
same as scan tool 
displayed 
temperature.

21

Interior temperature 
sensor

Interior 
temperature is the 
same as scan tool 
displayed 
temperature

23

Temperature setting

Displays air 
conditioning set 
temperature.

AUTOMATIC A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-13

24

ETC sensor

Engine coolant 
temperature is the 
same as scan tool 
displayed 
temperature.

26

Vehicle speed

Displays vehicle 
speed.

27

A/C Compressor drive 
request

Compressor ON

ON

Compressor OFF

OFF

28

Air conditioning switch

Air conditioning switch ON

ON

Air conditioning switch OFF

OFF

29

Refrigerant leak

Normal

34

Idle-up request

Displays idle-up 
request signal.

35

Rear heater SW light

36

PTC heater 1

37

PTC heater 2

38

PTC heater 3

45

In/out select damp 
poten (target)

Displays 
outside/inside air 
selection damper 
target position.

46

In/out select damp 
potentiometer

Displays 
outside/inside air 
selection damper 
position.

55

Air outlet c/o 
potentiometer

Displays air outlet 
changeover 
damper position.

56

Air outlet c/o potentio. 
(Target)

Displays air outlet 
changeover 
damper target 
position.

57

Low pressure judgment −

Normal

60

Rear defogger switch

Rear window defogger switch ON

ON

Rear window defogger switch OFF

OFF

61

Pressure sensor

Displays 
refrigerant 
pressure.

63

Air mix potentiometer

Displays the air 
mix damper 
position.

Item No.

Check items

Inspection status

The display 
contents under 
normal 
conditions

AUTOMATIC A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-14

67

Photo sensor

Displays sunload.

68

Front blower fan

Displays blower 
motor condition.

69

Front blower fan 
(Target)

Displays blower 
motor target value.

73

Refrigerant pressure

Displays 
refrigerant 
pressure status.

74

Condenser fan

Displays 
condenser fan 
running condition.

76

Temp. set dial position

Displays the set 
temperature output 
value on the 
control panel.

77

A/C Panel type

Dial/Auto/RHD

78

Fan set dial position

Displays the air 
volume output 
value on the 
control panel.

79

Air outlet c/o set dial 
position

Displays output 
value to the air 
outlet changeover 
dial on the control 
panel.

80

Fan set dial operation 
flag

ON when the air 
volume adjusting 
dial is operated

81

A/C SW operation flag

ON when the air 
conditioning switch 
is operated

82

Temp. set dial operation 
flag

ON when the air 
conditioning switch 
is operated

83

Defogger flag

ON when the air 
outlet changeover 
dial is set to the 
DEF position.

84

In/out air c/o SW 
operation flag

ON when the 
inside air/outside 
air changeover 
switch is operated

87

Rear defogger SW 
operation flag

ON when the rear 
window switch is 
operated

Item No.

Check items

Inspection status

The display 
contents under 
normal 
conditions

 

 

 

 

 

 

 

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