Mitsubishi Outlander (2003+). Manual — part 550
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-15
Step 3. Check the wiring harness between C-27
A/C-ECU connector (terminals 8 and 20) and
C-316 air thermo sensor connector (terminals 1
and 2).
NOTE: Prior to the wiring harness inspection, check
intermediate connector C-36 and heater water
temperature sensor connector C-314, and repair if
necessary.
•
Check the sensor signal line and earth line for
open or short circuit.
Q: Is the check result normal?
YES :
Replace the automatic air conditioner
control panel (A/C-ECU)
NO :
Repair the wiring harness.
AC301398
Connectors: C-27, C-36 <LHD>
C-27(B)
C-27
C-36
BE
C-36
Harness side
8
2
10 9
1
5
3
4
6
7
20191817161514131211
1 2
4
3
12
11
10
9
8
7
6
13
5
AC308736
Connectors: C-27, C-36 <RHD>
C-27(B)
C-27
C-36
AK
C-36
Harness side
8
2
10 9
1
5
3
4
6
7
20191817161514131211
1 2
4
3
12
11
10
9
8
7
6
13
5
AC309436
Connectors: C-314, C-316 <LHD>
Harness side
2
1
C-314
C-316
2
1
C-314
C-316
AB
Harness side
AC308740
Connectors: C-314, C-316 <RHD>
Harness side
C-314
C-316
2
1
C-314
C-316
AB
Harness side
2
1
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-16
Diagnosis code 31: Air mixing damper control motor potentiometer system
COMMENTS ON TROUBLE SYMPTOM
This code is set when the air mixing damper control
motor potentiometer does not send any signal to the
A/C-ECU due to short or open circuit.
Possible causes
•
Malfunction of the air mixing damper control
motor and potentiometer
•
Damaged the wiring harness or connectors
•
Malfunction of the automatic air conditioner
control panel (A/C-ECU)
DIAGNOSIS
Step 1. Check the air mixing damper control
motor and potentiometer.
Refer to
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Replace the air mixing damper control
motor and potentiometer.
MODE SELECTION DAMPER
CONTROL MOTOR AND
POTENTIOMETER
AIR MIXING DAMPER
CONTROL MOTOR AND
POTENTIOMETER
HEATER WATER
TEMPERATURE
SENSOR
A/C-ECU
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
Air Mixing Damper Control Motor Potentiometer Circuit
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-17
Step 2. Connector check: C-27 A/C-ECU
connector and C-313 air mixing damper control
motor and potentiometer connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the connector.
AC301397
Connector: C-27
<LHD>
AX
C-27(B)
Harness side
8
2
10 9
1
5
3
4
6
7
20191817161514131211
AC308735
Connector: C-27 <RHD>
AY
C-27(B)
Harness side
8
2
10 9
1
5
3
4
6
7
20191817161514131211
AC309435
Connector: C-313 <LHD>
AD
Harness side
2
6 5
1
3
4
AC308739
Connector: C-313 <RHD>
AD
Harness side
2
6 5
1
3
4
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-18
Step 3. Check the wiring harness between C-27
A/C-ECU connector (terminals 10, 5 and 20) and
C-313 air mixing damper control motor and
potentiometer connector (terminals 2, 5 and 6).
NOTE: Prior to the wiring harness inspection, check
intermediate connector C-36, mode selection
damper control motor and potentiometer connector
C-315 and heater water temperature sensor
connector C-314, and repair if necessary.
•
Check the potentiometer power supply, earth and
signal line for open or short circuit.
Q: Is the check result normal?
AC301398
Connectors: C-27, C-36 <LHD>
C-27(B)
C-27
C-36
BE
C-36
Harness side
8
2
10 9
1
5
3
4
6
7
20191817161514131211
1 2
4
3
12
11
10
9
8
7
6
13
5
AC308736
Connectors: C-27, C-36 <RHD>
C-27(B)
C-27
C-36
AK
C-36
Harness side
8
2
10 9
1
5
3
4
6
7
20191817161514131211
1 2
4
3
12
11
10
9
8
7
6
13
5
AC309436
Connectors: C-313, C-314, C-315 <LHD>
Harness side
C-314
C-315
2
1
C-314
C-313
AC
C-315
C-313
2
6 5
1
3
4
2
6 5
1
3
4
Harness side
Harness side
AC308740
Connectors: C-313, C-314, C-315 <RHD>
Harness side
C-314
C-315
2
1
C-314
C-313
AC
C-315
C-313
2
6 5
1
3
4
2
6 5
1
3
4
Harness side
Harness side
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