Mitsubishi Colt Ralliart. Manual — part 662
![](/vehicles/winoney/ama/flend/kntro.png)
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-9
Step 3. Check the wiring harness between B-15
combination meter connector (terminals 11 and
18) and B-12 air mixing damper control motor
and potentiometer connector (terminals 1 and 2).
AC313823 AL
Connectors: B-12, B-15
Harness side
B-15 (B)
B-12
B-15
Harness side
B-12
• Check the motor activating lines for open or short
circuit.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the wiring harness.
Step 4. Check the air mixing damper control
motor and potentiometer.
Refer to
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Replace the air mixing damper control
motor and potentiometer.
Step 5. Check whether the diagnosis code is
reset.
Recheck if the diagnosis code is set.
(1) Ignition switch: LOCK (OFF) position to ON
(2) Erase the diagnosis code.
(3) Turn the temperature adjusting knob to MAX
COOL for 16 seconds, and then turn to MAX
HOT for 16 seconds.
(4) Check if the diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Replace the combination meter (meter and
A/C-ECU).
NO :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/qudayon.png)
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-10
Code No.B1081 Communication error with control parts
METER AND A/C-ECU
A/C CONTROL CIRCUIT
COMBINATION
METER
POWER SOURCE
A/C
SWITCH
TEMPER-
ATURE
CONTROL
KNOB
BLOW
CONTROL
KNOB
OUTSIDE/INSIDE
AIR SELECTION
SWITCH
HEATER
CONTROL
ASSEMBLY
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
Combination Meter and Heater Control Assembly Circuit
DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the combination
meter (meter and A/C-ECU) can not receive the data
from the heater control.
POSSIBLE CAUSES
• Malfunction of the heater control assembly
• Damaged the wiring harness or connectors
• Malfunction of the combination meter (meter and
A/C-ECU)
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/thenid.png)
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-11
DIAGNOSIS PROCEDURE
Step 1. Connector check: B-14, B-15 combination
meter connector and B-30 heater control
assembly connector
AC313823AR
Connectors: B-14, B-15, B-30
Harness side
B-15 (B)
B-30
B-15
Harness side
B-12
B-14 (B)
Harness side
B-14
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the connector.
Step 2. Check the wiring harness between B-14,
B-15 combination meter connector (terminals 3,
29 and 35) and B-30 heater control assembly
(terminals 2, 1 and 9).
AC313823AR
Connectors: B-14, B-15, B-30
Harness side
B-15 (B)
B-30
B-15
Harness side
B-12
B-14 (B)
Harness side
B-14
• Check the heater control signal line and earth line
for open or short circuit.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the wiring harness.
Step 3. Check whether the diagnosis code is
reset.
Q: Is the diagnosis code set?
YES :
Go to Step 4.
NO :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction
Step 4. Replace the heater control assembly and
recheck the trouble symptom
Q: Is the check result normal?
YES :
This diagnosis is complete.
NO :
Replace the combination meter (meter and
A/C-ECU).
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/und.png)
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-12
TROUBLE SYMPTOM CHART
M1554005000838
Trouble symptom
Inspection procedure
number
Reference page
The outlet air temperature can not be changed even if
the amount of solar radiation changes
1
The blower does not work
2
The blower air volume cannot be changed
3
SYMPTOM PROCEDURES
Inspection Procedure 1: The outlet air temperature can not be changed even if the amount of solar
radiation changes
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
PHOTO SENSOR
COMBINATION
METER
SENSOR CIRCUIT
METER AND A/C-ECU
Photo Sensor Circuit
CIRCUIT OPERATION
When the blower air temperature can not be
changed even if the amount of solar radiation is
changed, the photo sensor may be defective.
POSSIBLE CAUSES
• Malfunction of photo sensor
• Damaged harness wires and connectors
• Malfunction of the combination meter (meter and
A/C-ECU)
DIAGNOSIS PROCEDURE
Step 1. M.U.T.-III diagnosis code.
Check whether the air conditioner sets a diagnosis
code or not.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to diagnosis code chart
.
Main
Index
Group
TOC
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