Mitsubishi Grandis. Manual — part 287
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-33
YES :
Go to Step 3.
NO :
Repair the connector.
Step 3. Check the wiring harness between C-106
A/C-ECU connector (terminals 1, 21 and 14) and
C-04 mode selection damper control motor and
potentiometer connector (terminals 7, 3 and 5).
NOTE: Prior to the wiring harness inspection, check
joint connector C-01, and repair if necessary.
• Check the potentiometer power supply, earth and
signal line 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 mode selection damper control
motor and potentiometer.
Refer to
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Replace the mode selection damper control
motor and potentiometer.
Step 5. MUT-III diagnosis code
Q: Is the diagnosis code set?
YES :
Replace the automatic air conditioner
control panel (A/C-ECU)
NO :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction
AC310614
AI
Connectors: C-01, C-04, C-106 <LHD>
Harness side
C-106
C-04
C-106
Harness side
C-04 (GR)
C-01
C-01
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-34
Code No. B1061,B1062: Potentiometer system for air outlet changeover damper <RHD>
COMMENTS ON TROUBLE SYMPTOM
This code is set when the mode selection 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 mode selection 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. MUT-III data list
Check that the following service data display
contents are normal. (Refer to
• Item 14: F.Air outlet c/o potentiometer
• Item 15: F.Air outlet c/o potentiometer (Target)
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 2.
Step 2. Connector check: C-106 A/C-ECU
connector and C-04 mode selection damper
control motor and potentiometer connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the connector.
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
MODE SELECTION
DAMPER CONTROL
MOTOR AND
POTENTIOMETER
A/C-ECU
Mode Selection Damper Control Motor And Potentiometer Circuit
AC310632 AD
Connectors: C-04, C-106 <RHD>
Harness side
C-106
C-04
C-106
Harness side
C-04 (GR)
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-35
Step 3. Check the wiring harness between C-106
A/C-ECU connector (terminals 1, 21 and 14) and
C-04 mode selection damper control motor and
potentiometer connector (terminals 7, 3 and 5).
• Check the potentiometer power supply, earth and
signal line 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 mode selection damper control
motor and potentiometer.
Refer to
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Replace the mode selection damper control
motor and potentiometer.
Step 5. MUT-III diagnosis code
Q: Is the diagnosis code set?
YES :
Replace the automatic air conditioner
control panel (A/C-ECU)
NO :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction
Code No. B1065: Motor drive system for air outlet switching damper
AC310632 AD
Connectors: C-04, C-106 <RHD>
Harness side
C-106
C-04
C-106
Harness side
C-04 (GR)
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
MODE SELECTION DAMPER CONTROL
MOTOR AND POTENTIOMETER
Mode Selection Damper Control Motor And Potentiometer Circuit
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-36
COMMENTS ON TROUBLE SYMPTOM
This code is set when the mode selection damper
cannot be rotated to the preset opening angle.
POSSIBLE CAUSES
• Malfunction of the rear mode selection damper
control motor and potentiometer
• Malfunction of the automatic air conditioner
control panel (A/C-ECU)
• Damaged the wiring harness or connectors
DIAGNOSIS
Step 1. MUT-III actuator test
Check that the following actuator test can be
executed normally.
• Item 20: Air outlet c/o dumper: FACE
• Item 21: Air outlet c/o dumper: Bi-Level
• Item 22: Air outlet c/o dumper: FOOT
• Item 23: Air outlet c/o dumper: DEF/FOOT
• Item 24: Air outlet c/o dumper: DEF
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 2.
Step 2. Connector check: C-105 A/C-ECU
connector and C-04 rear mode selection damper
control motor and potentiometer connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the connector.
AC310614
AJ
Connectors: C-04, C-105 <LHD>
Harness side
C-105
C-04
C-105
Harness side
C-04 (GR)
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37
38
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AC310632 AE
Connectors: C-04, C-105 <RHD>
Harness side
C-105
C-04
C-105
Harness side
C-04 (GR)
31
32
33
34
35
36
37
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