Mitsubishi Galant 9G. Manual — part 287

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-224

STEP 3. Check A/C pressure sensor connector A-30 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is A/C pressure sensor connector A-30 in good

condition?
YES : Go to Step 4.
NO : Repair or replace the connector. Refer to GROUP

00E, Harness Connector Inspection

P.00E-2

. Check

that the air conditioning works normally.

AC305206

CONNECTOR: A-30

AY

HARNESS SIDE

A-30 (B)

AC305234

CONNECTORS: C-15, C-16

C-16 (B)

HARNESS SIDE

C-16

C-15

C-15 (B)

HARNESS SIDE

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MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-225

STEP 4. Check the A/C pressure sensor.
(1) Assemble a gauge manifold on the high pressure service

valve.

(2) Disconnect the A/C pressure sensor connector and connect

special tool test harness MB991658 as shown in the
illustration.

(3) Turn ON the engine and then turn ON the air conditioner

switch.

(4) At this time, check to see that the voltage of A/C pressure

sensor terminal No. 2 reflects the specifications of the
figure.
NOTE: The allowance shall be defined as

±

5%.

Q: Is the A/C pressure sensor in good condition?

YES : Go to Step 5.
NO : Replace the A/C pressure sensor. Check that the air

conditioning works normally.

AC305034

A/C PRESSURE SENSOR

AD

AC307368

A/C
PRESSURE
SENSOR
SIDE

MB991658

AB

HARNESS SIDE

AC208297AB

REFRIGERANT PRESSURE (MPa)

OUTPUT VOLTAGE

(V)

0

1

2

3

5

4

1

2

3

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-226

STEP 5. Check A/C-ECU C-15 and C-16 for loose, corroded
or damaged terminals, or terminals pushed back in the
connector.
Q: Are A/C-ECU C-15 and C-16 in good condition?

YES : Go to Step 6.
NO : Repair or replace the connector. Refer to GROUP

00E, Harness Connector Inspection

P.00E-2

. Check

that the air conditioning works normally.

AC305206

CONNECTOR: A-30

AY

HARNESS SIDE

A-30 (B)

AC305234

CONNECTORS: C-15, C-16

C-16 (B)

HARNESS SIDE

C-16

C-15

C-15 (B)

HARNESS SIDE

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MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-227

STEP 6. Check the wiring harness between A/C-ECU
connector C-15 (terminal 12), C-16 (terminals 34 and 26)
and A/C pressure sensor connector A-30 (terminals 3, 1
and 2).

NOTE: Also check intermediate connector C-29 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-29 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection

P.00E-2

.

Q: Is the wiring harness between A/C-ECU connector C-15

(terminal 12), C-16 (terminals 34 and 26) and A/C
pressure sensor connector A-30 (terminals 3, 1 and 2) in
good condition?
YES : Repair the A/C-ECU. Check that the air conditioning

works normally.

NO : Repair the wiring harness. Check that the air

conditioning works normally.

AC305206

CONNECTOR: A-30

AY

HARNESS SIDE

A-30 (B)

AC305234

CONNECTORS: C-15, C-16

C-16 (B)

HARNESS SIDE

C-16

C-15

C-15 (B)

HARNESS SIDE

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AC305231AI

CONNECTOR: C-29