Mitsubishi Outlander GS45X. Manual — part 1012

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-75

STEP 10. Check the wiring harness between A/C
compressor clutch relay connector B-16X (terminals 2 and
4) and the fusible link (36).

• Check the A/C compressor clutch relay power supply line

for open circuit.

Q: Is the wiring harness between A/C compressor clutch

relay connector B-16X (terminals 2 and 4) 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

P.00-15

.

NO : Repair the wiring harness. Check that the A/C works

normally.

STEP 11. Check the wiring harness between A/C
compressor clutch relay connector B-16X (terminal 3) and
A/C compressor assembly connector B-17 (terminal 1).
NOTE: Also check intermediate connector A-13 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector A-13 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection

P.00E-2

.

• Check the A/C compressor assembly power supply line for

open circuit.

Q: Is the wiring harness between A/C compressor clutch

relay connector B-16X (terminal 3) and A/C compressor
assembly connector B-17 (terminal 1) in good
condition?
YES : Go to Step 12.
NO : Repair the wiring harness. Check that the A/C works

normally.

STEP 12. Check the wiring harness between powertrain
control module connector B-11 (terminal 102) and A/C
compressor clutch relay connector B-16X (terminal 1).

• Check the powertrain control module signal line for open

and short circuit.

Q: Is the wiring harness between powertrain control

module connector B-11 (terminal 102) and A/C
compressor clutch relay connector B-16X (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

P.00-15

.

NO : Repair the wiring harness. Check that the A/C works

normally.

MANUAL A/C DIAGNOSIS

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HEATER, AIR CONDITIONING AND VENTILATION

55A-76

STEP 13. Check the refrigerant temperature switch.

CAUTION

Do not heat more than necessary.
(1) Dip the metal part of the cooling temperature switch into

engine oil and increase the oil temperature using a gas
burner or similar.

(2) When the oil temperature reaches the standard value,

check that voltage is supplied between the terminals.

Standard value:

NOTE: When the oil temperature is 135

°

C (275

°

F) or more

and there is no continuity, the resistance will not be 2

Ω

or

lower until the oil temperature reduces to 120

°

C (248

°

F) or

less.

Q: Is the refrigerant temperature switch operating

properly?
YES : Go to Step 14.
NO : Replace the refrigerant temperature switch. Check

that the A/C works normally.

STEP 14. Replace the A/C-ECU.
Q: Does the A/C operate normally?

YES : No action is necessary and testing is complete.
NO : Replace the powertrain control module. Check that

the A/C works normally.

Item

Temperature

Less than 2 ohms

Slightly below 120

°C (248°F)

No continuity

135

°C (275°F) or more

AC100787

THERMOMETER

ENGINE OIL

AB

AC100810

Less than 2

Ω

No continuity

120˚C
248˚F

135˚C
275˚F

BB

Oil temperature

MANUAL A/C DIAGNOSIS

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HEATER, AIR CONDITIONING AND VENTILATION

55A-77

INSPECTION PROCEDURE 4: Blower Fan and Motor do not Turn.

37

BLOWER
RELAY

ACA02729

A/C-ECU

Blower Motor Circuit

FUSIBLE
LINK

ETACS-
ECU

BLOWER
MOTOR

POWER
TRANSISTOR

MANUAL A/C DIAGNOSIS

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HEATER, AIR CONDITIONING AND VENTILATION

55A-78

.

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.

AC702208AI

Connector: C-109, C-114, C-120

C-114

C-120

C-109 (B)

AC701632 AO

Connector: C-303, C-309, C-315

C-303

C-309 (B)

C-315