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
Ω 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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