Mitsubishi L200. Manual — part 872
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-17
STEP 4. Check whether the diagnosis code is
reset.
Q: Is the diagnosis code set?
YES :
Replace the automatic A/C 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.B1045: Motor drive system for the air mixing damper <RHD>
A/C-ECU
AIR MIXING DAMPER CONTROL
MOTOR AND POTENTIOMETER
Air Mixing Damper Control Motor And Potentiometer Circuit
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple
MOTOR DRIVE
CIRCUIT
DIAGNOSIS CODE SET CONDITION
This code is set when the air mixing damper cannot
be rotated to the preset opening angle.
POSSIBLE CAUSES
• Malfunction of the air mixing damper control
motor and potentiometer
• Malfunction of the automatic A/C control panel (A/
C-ECU)
• Damaged the wiring harness or connectors
DIAGNOSIS PROCEDURE
STEP 1. Connector check: C-09 A/C-ECU
connector and C-49 air mixing damper control
motor and potentiometer connector
AC509932 DS
Harness side
C-49 (B)
C-49
C-09
C-09 (GR)
Connectors: C-09, C-49
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the connector.
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-18
STEP 2. Check the wiring harness between C-09
A/C-ECU connector (terminals 12 and 1) and C-49
air mixing damper control motor and
potentiometer connector (terminals 1 and 3).
AC509932 DS
Harness side
C-49 (B)
C-49
C-09
C-09 (GR)
Connectors: C-09, C-49
• Check the motor activating lines for open and
short circuit.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the wiring harness.
STEP 3. Check the air mixing damper control
motor and potentiometer.
Refer to
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the air mixing damper control
motor and potentiometer.
STEP 4. Check whether the diagnosis code is
reset.
Q: Is the diagnosis code set?
YES :
Replace the automatic A/C 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. B1061,B1062: Potentiometer system for Mode Selection Damper
A/C-ECU
MODE SELECTION
DAMPER CONTROL
MOTOR AND
POTENTIOMETER
Mode Selection Damper Control Motor And Potentiometer Circuit
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple
AC900623
COMMENTS ON TROUBLE SYMPTOM
This code is set when the mode selection damper
control motor potentiometer does not send any sig-
nal to the A/C-ECU due to short or open circuit.
PROBABLE CAUSES
• Malfunction of the mode selection damper control
motor and potentiometer
• Damaged the wiring harness or connectors
• Malfunction of the automatic A/C control panel (A/
C-ECU)
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-19
DIAGNOSIS PROCEDURE
STEP 1. Connector check: C-44 A/C-ECU
connector and C-38 mode selection damper
control motor and potentiometer connector
AC509613BA
C-38 (B)
Harness side
Connector: C-38 <LHD>
AC509930 AZ
C-38 (B)
Harness side
Connector: C-38 <RHD>
AC509611BM
Harness side
Connector: C-44 <LHD>
AC509932BU
Harness side
Connector: C-44 <RHD>
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the connector.
STEP 2. Check the wiring harness between C-44
A/C-ECU connector (terminals 34, 32 and 38) and
C-38 mode selection damper control motor and
potentiometer connector (terminals 6, 2 and 5).
AC509613BA
C-38 (B)
Harness side
Connector: C-38 <LHD>
AC509930 AZ
C-38 (B)
Harness side
Connector: C-38 <RHD>
AC509611BM
Harness side
Connector: C-44 <LHD>
AC509932BU
Harness side
Connector: C-44 <RHD>
• Check the potentiometer power supply, earth and
signal line for open and short circuit.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the wiring harness.
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-20
STEP 3. Check the mode selection damper
control motor and potentiometer.
Refer to
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the mode selection damper control
motor and potentiometer.
STEP 4. M.U.T.-III diagnosis code
Q: Is the diagnosis code set?
YES :
Replace the automatic A/C 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 mode selection damper
A/C-ECU
MODE SELECTION DAMPER CONTROL
MOTOR AND POTENTIOMETER
Mode Selection Damper Control Motor And Potentiometer Circuit
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple
MOTOR DRIVE
CIRCUIT
AC806070
A/C-ECU
MODE SELECTION DAMPER CONTROL
MOTOR AND POTENTIOMETER
Mode Selection Damper Control Motor And Potentiometer Circuit
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple
MOTOR DRIVE
CIRCUIT
AC806070AB
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 A/C control panel (A/
C-ECU)
• Damaged the wiring harness or connectors
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