Mitsubishi Outlander XL. Manual - part 1196

ZC6008760036

Connector: C-109, C-114, C-120

C-114

C-120

C-109 (B)

ZC600878000

Connector: C-303, C-309, C-315

C-303

C-309 (B)

C-315

CIRCUIT OPERATION
If the blower motor does not operate, the blower relay
system is suspected.

TROUBLESHOOTING HINTS

｠

Malfunction of the power transistor

｠

Malfunction of the blower motor

｠

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 blower motor connector C-114 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.

Q:Is blower motor connector C-114 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 voltage at blower motor connector
C-114.

(1)

Disconnect blower motor connector C-114, and measure the
voltage at the wiring harness side.

(2)

Turn the ignition switch to the "ON" position.

(3)

Turn the blower switch to the "Maximum air volume" position.

AIR CONDITIONING

55A-75

MANUAL A/C DIAGNOSIS

ZC6022230016

Harness side: C-114

(4)

Measure the voltage between terminal 1 and ground.

｠

The  measured  value  should  be  approximately  12  volts
(battery positive voltage).

Q:Is the measured voltage approximately 12 volts?

YES:

 Go to Step 3.

NO:

 Refer to Inspection procedure 10, "Blower motor power

supply system P.55A-94."

STEP 3. Check blower motor connector C-114 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.

Q:Is blower motor connector C-114 in good condition?

YES:

 Go to Step 4.

NO:

 Repair or replace the connector. Refer to GROUP 00E,

Harness Connector Inspection P.00E-2.The blower motor
should operate normally.

STEP 4. Check the blower fan and motor operation.

ZC600454 0000

When battery voltage is applied between the terminals, check
that the motor operates. Also, check that there is no abnormal
noise.

Q:Is there any abnormal noise?

YES:

 Go to Step 5.

NO:

 Replace the blower relay. The blower motor should

operate normally.

STEP 5. 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 6.

NO:

 Repair or replace the connector. Refer to GROUP 00E,

Harness Connector Inspection P.00E-2.The blower motor
should operate normally.

STEP 6. Check the wiring harness between A/C-ECU
connector C-109 (terminal 1) and blower motor connector
C-114 (terminal 1).

Q:Is the wiring harness between A/C-ECU connector C-109

(terminal 1) and blower motor connector C-114 (terminal

1) in good condition?

YES:

 Go to Step 7.

NO:

 Repair the wiring harness. The blower motor should

operate normally.

55A-76

AIR CONDITIONING

MANUAL A/C DIAGNOSIS

STEP 7. 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 8.

NO:

 Repair or replace the connector. Refer to GROUP 00E,

Harness Connector Inspection P.00E-2.The blower motor
should operate normally.

STEP 8. 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 10.

NO:

 Go to Step 9.

STEP 9. 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.

STEP 10. 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 11.

NO:

 Repair the wiring harness. The blower motor should

operate normally.

STEP 11. 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.

AIR CONDITIONING

55A-77

MANUAL A/C DIAGNOSIS

INSPECTION PROCEDURE 5: Blower Air Amount cannot be Changed.

M15502000914USA0000010000

Blower Motor Circuit

FUSIBLE
LINK

37

BLOWER
RELAY

ETACS-
ECU 

A/C-ECU

BLOWER
MOTOR

POWER
TRANSISTOR

55A-78

AIR CONDITIONING

MANUAL A/C DIAGNOSIS