Mitsubishi Galant (2004+). Manual — part 761
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-183
INSPECTION PROCEDURE 2: When the Air Outlet Changeover Control Knob is Moved to
DEFROSTER or DEFROSTER/FOOT Position, the A/C or the Inside/outside Air Changeover Damper
Motor does not operate.
.
TECHNICAL DESCRIPTION (COMMENT)
If the outside/inside air selection damper control
motor does not operate normally, the inside/outside
air changeover damper motor system may be defec-
tive.
.
TROUBLESHOOTING HINTS
• Malfunction of the A/C-ECU
• Malfunction of the outside/inside air selection
damper control motor
• Damaged harness wires or connectors
DIAGNOSIS
Check operation of the outside/inside air selection damper
control motor.
(1) Turn the ignition switch to the "ON" position.
(2) Outside/inside air selection damper motor switch: This is
used to switch from the inside air to outside air or vice
versa.
(3) Check to see that the outside/inside air selection damper
motor operates normally.
Q: Does outside/inside air selection damper control motor
work normally?
YES : Replace the A/C-ECU.
NO : Refer to Inspection procedure 3, "Inside/outside air
."
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-184
INSPECTION PROCEDURE 3: Outside/Inside Air Changeover is not possible.
A/C-ECU
OUTSIDE/INSIDE
AIR SELECTION
DAMPER CONTROL
MOTOR
IGNITION
SWITCH (IG2)
JUNCTION
BLOCK
JOINT
CONNECTOR (2)
MOTOR DRIVE
CIRCUIT
Outside/Inside air selection Motor Circuit
AC305231AZ
CONNECTOR: C-03
AC305233
CONNECTORS: C-15, C-106
C-106
C-15 (B)
BT
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-185
.
CIRCUIT OPERATION
If the outside/inside air selection damper control
motor does not operate normally, the outside/inside
air selection damper control motor system may be
defective.
.
TROUBLESHOOTING HINTS
• Malfunction of the outside/inside air selection
damper control motor
• Malfunction of the A/C-ECU
• Damaged harness wires or connectors
DIAGNOSIS
Required Special Tool:
• MB991223: Test Harness Set
STEP 1. Check the defogger and A/C operations.
Q: Do the defogger and A/C work normally?
YES : Go to Step 2.
NO : Refer to Inspection procedure 10 "Malfunction of the
A/C-ECU power supply system
STEP 2. Check outside/inside air selection damper control
motor connector C-106 for loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Q: Is outside/inside air selection damper control motor
connector C-106 in good condition?
YES : Go to Step 3.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
. Check
that the outside/inside air selection damper control
motor works normally.
AC305415
CONNECTORS: C-211, C-215
JUNCTION BLOCK
(FRONT VIEW)
C-215
C-211
BA
AC305233
HARNESS SIDE
BJ
CONNECTOR: C-106
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-186
STEP 3. Measure the voltage at outside/inside air selection
damper control motor connector C-106.
(1) Disconnect outside/inside air selection damper control
motor connector C-106, and measure the voltage at the
harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 1 and ground.
• The measured value should be approximately 12 volts
(battery positive voltage).
Q: Does the measured voltage correspond with this range?
YES : Go to Step 5.
NO : Go to Step 4.
STEP 4. Check the wiring harness between outside/inside
air selection damper control motor connector C-106
(terminal 1) and the ignition switch (IG2).
AC305233
HARNESS SIDE
BJ
CONNECTOR: C-106
AC209365
CONNECTOR C-106
(HARNESS SIDE)
GR
AC305233
HARNESS SIDE
BJ
CONNECTOR: C-106
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