Mitsubishi Outlander GS45X. Manual — part 1010
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-67
STEP 4. Check the wiring harness between A/C-ECU
connector C-109 (terminal 15) and ETACS-ECU connector
C-317 (terminal 5).
• Check the A/C-ECU power supply line for open circuit.
Q: Is the wiring harness between A/C-ECU connector
C-109 (terminal 15) and ETACS-ECU connector C-317
(terminal 5) 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 the wiring harness. Check that the A/C works
normally.
STEP 5. Measure the voltage at A/C-ECU connector C-109.
(1) Disconnect A/C-ECU connector C-109 and measure the
voltage at the harness side.
(2) Measure the voltage between terminal 13 and ground.
• The measured value should be approximately 12 volts
(battery positive voltage).
Q: Is the measured voltage approximately 12 V?
YES : Go to Step 7.
NO : Go to Step 6.
STEP 6. Check the wiring harness between A/C-ECU
connector C-109 (terminal 13) and the fusible link (36).
NOTE: Also check ETACS-ECU connectors C-307 and C-317
for loose, corroded, or damaged terminals, or terminals pushed
back in the connector. If ETACS-ECU connector C-317 is dam-
aged, repair or replace the connector as described in GROUP
00E, Harness Connector Inspection
• Check the A/C-ECU power supply line for open circuit.
Q: Is the wiring harness between A/C-ECU connector
C-109 (terminal 13) and the fusible link (36) 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 the wiring harness. Check that the A/C works
normally.
AC608254BU
Harness side: C-109
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-68
STEP 7. Measure the resistance at A/C-ECU connector
C-109.
(1) Disconnect A/C-ECU connector C-109, and measure at the
wiring harness side.
(2) Measure the resistance between terminal 14 and ground.
• The measured value should be 2 ohms or less.
Q: Does the measured resistance value correspond with
this range?
YES : Replace the A/C-ECU, and check that the A/C works
normally.
NO : Go to Step 8.
STEP 8. Check the wiring harness between A/C-ECU
connector C-109 (terminal 14) and the ground.
• Check the A/C-ECU ground line for open circuit.
Q: Is the wiring harness between A/C-ECU connector
C-109 (terminal 14) 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
.
NO : Repair the wiring harness. Check that the A/C works
normally.
AC608812
Harness side: C-109
EF
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-69
INSPECTION PROCEDURE 3: The Compressor does not Work.
A/C Compressor Assembly Circuit
A/C
COMPRESSOR
CLUTCH RELAY
A/C
COMPRESSOR
ASSEMBLY
A/C
REFRIGERANT
TEMPERATURE
SWITCH
A/C
COMPRESSOR
CLUTCH
ENGINE-ECU
RELAY
BOX
FUSIBLE
LINK
36
ACA02728
MANUAL A/C DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-70
.
FUNCTION
Compressor that recovers the refrigerant, which
evaporated in the evaporator and became a
high-temperature and high-pressure gas, and turns it
into liquid again.
.
PROBABLE CAUSES
• Insufficient refrigerant
• Malfunction of connector.
• Malfunction of the harness (A/C compressor cir-
cuit is open/shorted to ground)
• Malfunction of the A/C pressure sensor.
• Malfunction of the A/C compressor.
• Malfunction of the A/C compressor clutch relay.
• Malfunction of the A/C-ECU.
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB992006: Extra Fine Probe
• MB991658: Test Harness Set
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
AC702634
Connector: B-17
B-17 (B)
AB
AC803380
AB
Connector: B-16X <2.4L>
B-16X
AC702636 AC
Connector: B-16X <3.0L>
B-16X
AC702370AC
Connector: A-13
AC702635AC
Connector: B-11
B-11 (GR)
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