Mitsubishi Outlander GS45X. Manual — part 1017
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-95
STEP 9. Check ETACS-ECU connector C-301 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-301 in good condition?
YES : Go to Step 10.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
. Check
that the rear window defogger system works normally.
STEP 10. Check the wiring harness between rear window
defogger relay connector C-306 (terminal 1) and
ETACS-ECU C-301 (terminal 12).
• Check the rear window defogger relay power supply line for
open circuit.
Q: Is the wiring harness between rear window defogger
relay connector C-306 (terminal 1) and ETACS-ECU
C-301 (terminal 12) in good condition?
YES : Check that the rear window defogger system works
normally.
NO : Repair the wiring harness. Check that the rear
window defogger system works normally.
STEP 11. Check the wiring harness between rear window
defogger relay connector C-306 (terminal 2) and
A/C-control panel connector C-119 (terminal 6).
• Check the A/C-ECU signal line for open and short circuit.
Q: Is the wiring harness between rear window defogger
relay connector C-306 (terminal 2) and A/C-control panel
connector C-119 (terminal 6) in good condition?
YES : Go to Step 12.
NO : Repair or replace the wiring harness. Refer to
GROUP 00E, Harness Connector Inspection
. Check that the rear window defogger
system works normally.
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-96
STEP 12. Check the wiring harness between rear window
defogger relay connector C-306 (terminal 3) and rear
window defogger connector F-20 (terminal 1).
NOTE: Also check intermediate connector C-32 and D-12 for
loose, corroded, or damaged terminals, or terminals pushed
back in the connector. If intermediate connector C-32 and D-12
is damaged, repair or replace the connector as described in
GROUP 00E, Harness Connector Inspection
• Check the rear window defogger power supply line for open
circuit.
Q: Is the wiring harness between rear window defogger
relay connector C-306 (terminal 3) and rear window
defogger connector F-20 (terminal 1) 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
.
NO : Repair or replace the wiring harness. Refer to
GROUP 00E, Harness Connector Inspection
. Check that the rear window defogger
system works normally.
STEP 13. Check rear window defogger connector F-05 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is rear window defogger connector F-05 in good
condition?
YES : Go to Step 14.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
. Check
that the rear window defogger system works normally.
STEP 14. Measure the resistance at rear window defogger
connector F-05.
(1) Disconnect rear window defogger connector F-05, and
measure at the wiring harness side.
(2) Measure the resistance between terminal 1 and ground.
• The measured value should be 2 ohms or less.
Q: Does the measured resistance value correspond with
this range?
YES : Go to Step 16.
NO : Go to Step 15.
AC608254CB
Harness side: F-05
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-97
STEP 15. Check the wiring harness between rear window
defogger connector F-05 (terminal 1) and the ground.
• Check the rear window defogger ground line for open cir-
cuit.
Q: Is the wiring harness between rear window defogger
connector F-05 (terminal 1) and the ground in good
condition?
YES : Check that the rear window defogger system works
normally.
NO : Repair or replace the wiring harness. Refer to
GROUP 00E, Harness Connector Inspection
. Check that the rear window defogger
system works normally.
STEP 16. Check the rear window defogger.
(1) Let the engine run at 2,000 r/min, and check the printed
heater with the battery fully charged.
(2) Turn on the rear window defogger switch, and use a
voltmeter to measure the voltage in each printed heater at
middle point A on the rear window glass.
• The value should be approximately 6 volts.
Q: Does the rear window defogger work normally?
YES : Replace the A/C-ECU. Check that the rear window
defogger system works normally.
NO : Repair the rear window defogger.
AC407247
Positive
terminal
Voltage (V)
Voltage (V)
Normal characteristic curve
Abnormal characteristic curve
Printed
heater
line
A (Center point)
Negative
terminal
Positive
terminal
Printed
heater
line
Negative
terminal
12
6
12
6
Open circuit
point
AE
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-98
INSPECTION PROCEDURE 10: Blower Motor power supply system.
37
BLOWER
RELAY
ACA02729
A/C-ECU
Blower Motor Circuit
FUSIBLE
LINK
ETACS-
ECU
BLOWER
MOTOR
POWER
TRANSISTOR
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