Mitsubishi Outlander (2013+). Manual — part 743

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-28

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use

Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunction ).

NO :

Repair the connector(s) or wiring harness.

STEP 3. Check of open circuit in blower motor
line between blower motor connector terminal
and blower relay.

NOTE: Prior to the wiring harness inspection, check
ETACS-ECU connector and repair if necessary.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the connector(s) or wiring harness.

STEP 4. Retest the system.
Check that the blower motor is energised.

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use

Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunction ).

NO :

Replace the ETACS-ECU.

INSPECTION PROCEDURE 12: Heater controller assembly (A/C-ECU) power supply system

COMMENTS ON TROUBLE SYMPTOM

If the heater controller assembly (A/C-ECU) is not
energised, the power supply or earth system to the
ECU may be defective.

PROBABLE CAUSES

• Malfunction of the heater controller assembly

(A/C-ECU)

• Damaged wiring harness or connectors

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III other system's diagnosis code
Check that the ETACS-ECU has not set a diagnosis
code.

Q: Is the diagnosis code set?

YES :

Carry out the diagnosis code procedures.

Refer to GROUP 54A, ETACS-ECU .

NO :

Go to Step 2.

STEP 2. Measure the voltage at the heater
controller assembly (A/C-ECU) connector.
(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Ignition switch: ON
(3) Voltage between terminal No. 20 and body earth

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Go to Step 3.

STEP 3. Check of open circuit in heater controller
assembly (A/C-ECU) IG1line between
ETACS-ECU connector and heater controller
assembly (A/C-ECU) connector.

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use

Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunction ).

NO :

Repair the connector(s) or wiring harness.

STEP 4. Measure the voltage at the heater
controller assembly (A/C-ECU) connector.
(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Voltage between terminal No. 19 and body earth

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Go to Step 5.

STEP 5. Check of open circuit in heater controller
assembly (A/C-ECU) B/UP line between
ETACS-ECU connector and heater controller
assembly (A/C-ECU) connector.

NOTE: Prior to the wiring harness inspection, check
joint connector and repair if necessary.

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use

Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunction ).

NO :

Repair the connector(s) or wiring harness.

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-29

STEP 6. Measure the resistance at the heater
controller assembly (A/C-ECU) connector.
(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Resistance between terminal No. 18 and body

earth

OK: Continuity exists (2

or less)

Q: Is the check result normal?

YES :

Replace the heater controller assembly

(A/C-ECU).

NO :

Go to Step 7.

STEP 7. Check of open circuit in heater controller
assembly (A/C-ECU) E line between heater
controller assembly (A/C-ECU) connector and
earth J/C (DASH) connector.

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use

Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunction ).

NO :

Repair the connector(s) or wiring harness.

DATA LIST REFERENCE TABLE

M1554005101429

Item No.

Check item

Inspection status

The display contents
under normal condition

17

Engine speed

Displays correct engine
speed.

19

Ambient temperature
sensor

Ambient temperature is the
same as M.U.T.-III
displayed temperature

20

Air thermo sensor

Evaporator outlet
temperature is the same as
M.U.T.-III displayed
temperature.

21

Interior temperature
sensor

Interior temperature is the
same as M.U.T.-III
displayed temperature

24

Engine coolant TEMP
sensor

Engine coolant temperature
is the same as M.U.T.-III
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 conditioner switch ON

ON

Air conditioner switch OFF

OFF

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-30

29

Refrigerant leak
(Level 20%)

Normal

34

Idle up request

Displays idle-up request
signal.

45

In/out select damper
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

Refrigerant leak
(Low pressure)

Normal

60

Rear defogger switch

Rear window defogger switch ON

ON

Rear window defogger switch OFF

OFF

61

Pressure sensor

Displays refrigerant
pressure.

68

Front blower fan

Displays blower motor
condition.

69

Front blower fan
(Target)

Displays blower motor
target value.

74

Condenser fan

Displays condenser fan
running condition.

91

A/C Compressor drive
flag

ON when the compressor is
activated.

92

Wiper operation flag

ON when the wiper is
operated.

93

Ignition position
information

Ignition switch position
status

94

Power source voltage

Displays power supply
voltage.

95

IOD fuse equipment
flag

IOD fuse status

96

A/T lock up open
request

Request not to lock up the CVT: ON

ON

Request not to lock up the CVT: OFF OFF

151

Dr air mix potentiometer

Displays the air mix damper
position (driver's side).

152

As air mix
potentiometer

Displays the air mix damper
position (front passenger's
side).

Item No.

Check item

Inspection status

The display contents
under normal condition

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-31

NOTE: *: Other items than listed above are also dis-
played. However, ignore them.

ACTUATOR TEST TABLE

M1554005201277

Item No.

Check item

Driven content

2

Idle up request*

Idle-up request signal

5

In/out selection damper

The moving position of outside/inside air
selection 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

Selected request signal not to lock up the
CVT is sent.

16

Dr air mix damper motor

The air mix damper motor (driver's side)
moves to the selected position.

17

As air mix damper motor

The air mix damper motor (front
passenger's side) moves to the selected
position.

NOTE:

.

*: When the engine is not running these functions
do not work.

Other items than listed above are also displayed.
However, ignore them.

CHECK AT A/C-ECU TERMINALS

M1552010302857

ACB05937

<C-206>

AB

<C-205>

153

High pressure fail flag

At normal high pressure

OFF

At abnormal high pressure

ON

154

Dr temperature setting

Displays air conditioner set
temperature (driver's side).

155

As temperature setting

Displays air conditioner set
temperature (front
passenger's side).

160

Low pressure fail flag

At normal low pressure

OFF

At abnormal low pressure

ON

Item No.

Check item

Inspection status

The display contents
under normal condition

Terminal
No.

Terminal
code

Check item

Check condition

Normal condition

1

SENB

A/C pressure sensor power
supply

Ignition switch: IG2

5 V

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Политика конфиденциальности