Mitsubishi Outlander XL. Manual — part 1197
ZC6008760037
Connector: C-109, C-120
C-120
C-109 (B)
CIRCUIT OPERATION
If the blower motor speed cannot be changed, the
power transistor circuit is suspected.
TROUBLESHOOTING HINTS
⦆
Malfunction of the power transistor
⦆
Malfunction of the A/C-ECU
⦆
Damaged harness wires or connectors
DIAGNOSIS
Required Special Tools:
⦆
MB991223: Harness Set
⦆
MB992006: Extra Fine Probe
STEP 1. Check power transistor connector C-120 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q:Is power transistor connector C-120 in good condition?
YES:
Go to Step 2.
NO:
Repair or replace the connector. Refer to GROUP 00E,
Harness Connector Inspection P.00E-2.The blower motor
should operate normally.
STEP 2. Measure the resistance at power transistor
connector C-120.
(1)
Disconnect power transistor connector C-120, and measure
the resistance at the wiring harness side.
AC604249 0016
Harness side: C-120
(2)
Measure the resistance value between terminal 1 and
ground.
OK: The measured value should be 2 ohms or less
Q:Does the measured resistance value correspond with this
range?
YES:
Go to Step 4.
NO:
Go to Step 3.
STEP 3. Check the wiring harness between power transitor
connector C-120 (terminal 1) and ground.
Q:Is the wiring harness between power transitor connector
C-120 (terminal 1) and ground in good condition?
YES:
It can be assumed that this malfunction is
intermittent. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to Cope
with Intermittent Malfunctions P.00-15.
NO:
Repair the wiring harness. The blower motor should
operate normally.
AIR CONDITIONING
55A-79
MANUAL A/C DIAGNOSIS
STEP 4. Check A/C-ECU connector C-109 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q:Is A/C-ECU connector C-109 in good condition?
YES:
Go to Step 5.
NO:
Repair or replace the connector. Refer to GROUP 00E,
Harness Connector Inspection P.00E-2.The blower motor
should operate normally.
STEP 5. Check the wiring harness between A/C-ECU
connector C-109 (terminals 1 and 2) and power transitor
connector C-120 (terminals 2 and 4).
Q:Is the wiring harness between A/C-ECU connector C-109
(terminals 1 and 2) and power transitor connector C-120
(terminals 2 and 4) in good condition?
YES:
Go to Step 6.
NO:
Repair the wiring harness. The blower motor should
operate normally.
STEP 6. Replace the power transistor and check the trouble
symptom again
Check the trouble symptom again.
Q:Is the check result satisfactory?
YES:
The procedure is complete.
NO:
Replace the A/C-ECU.
55A-80
AIR CONDITIONING
MANUAL A/C DIAGNOSIS
INSPECTION PROCEDURE 6: Outside/Inside Air Changeover is not possible.
M15502000912USA0000010000
Outside/Inside Air Selection Damper Control Motor Circuit
OUTSIDE/INSIDE AIR
SELECTION DAMPER
CONTROL MOTOR
A/C-ECU
ZC6008760038
Connectors: C-106, C-108
C-106
C-108 (B)
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 Tools:
⦆
MB991223: Harness Set
⦆
MB992006: Extra Fine Probe
⦆
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆
MB991824: V.C.I.
AIR CONDITIONING
55A-81
MANUAL A/C DIAGNOSIS
⦆
MB991827: M.U.T.-III USB Cable
⦆
MB991910: M.U.T.-III Main Harness A
STEP 1. Using scan tool MB991958, read the diagnostic
trouble code.
ZC501967
AC404789
ZC5019680000
MB991824
MB991827
MB991910
Data link
connector
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.
Check if an A/C-ECU DTC is set.
(1)
Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.55A-6."
(2)
Turn the ignition switch to the "ON" position.
(3)
Check if the DTC is set.
(4)
Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the check result satisfactory?
YES:
Go to Step 2.
NO:
Refer to DIAGNOSTIC TROUBLE CODE CHART P.55A-8.
STEP 2. Check outside/inside air selection damper control
motor connector C-106 and A/C-ECU connector C-108 for
loose, corroded or damaged terminals, or terminals pushed
back in the connector.
Q:Are outside/inside air selection damper control motor
connector C-106 and A/C-ECU connector C-108 in good
condition?
YES:
Go to Step 3.
NO:
Repair or replace the connector. Refer to GROUP 00E,
Harness Connector Inspection P.00E-2. Check that the A/C
works normally.
STEP 3. Check the wiring harness between A/C-ECU
connector C-108 (terminal 26, 25, 27, 24 and 29) and outside/
inside air selection damper control motor connector C-106
(terminals 2, 5, 4. 1 and 3).
Q:Are the wiring harness between A/C-ECU connector
C-108 (terminal 26, 25, 27, 24 and 29) and outside/inside
air selection damper control motor connector C-106
(terminals 2, 5, 4. 1 and 3) in good condition?
YES:
Go to Step 4.
NO:
Repair the wiring harness. Check that the A/C works
normally.
STEP 4. Replace the power transistor and check the trouble
symptom again
Check the trouble symptom again.
55A-82
AIR CONDITIONING
MANUAL A/C DIAGNOSIS
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