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