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
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
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