Mitsubishi Colt Ralliart. Manual - part 533

 

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Mitsubishi Colt Ralliart. Manual - part 533

 

 

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-40

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness.

Step 6. Drive belt tension check 
Refer to GROUP 11A 

− Engine adjustment 

P.11A-6

.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Replace the drive belt.

Step 7. Check the magnetic clutch for A/C 
compressor
 Refer to 

P.55A-64

.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Replace the magnetic clutch.

Step 8. Check the air gap.

AC208396

Thickness 
gauge

AB

Use a feeler gauge and check that the air gap is 
within the standard value.

Standard value: 0.25 

 0.5 mm

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Adjust the air gap.

Step 9. Check the refrigerant temperature switch
(1) Remove the refrigerant temperature switch. 

Refer to 

P.55A-65

.

(2) Refer to 

P.55A-66

 and check it.

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Replace the refrigerant temperature switch.

Step 10. Check the refrigerant level.
 Refer to 

P.55A-50

.

Q: Is the refrigerant level correct?

YES : 

Go to Step 11.

NO : 

Correct the refrigerant level (Refer to 
On-vehicle Service 

P.55A-50

).

Step 11. Replace the A/C compressor assembly
(1) Replace the A/C compressor assembly.
(2) Operates the A/C.
(3) Check that the A/C indicator lamp does not flash.

Q: Is the check result normal?

YES : 

This diagnosis is complete.

NO : 

Replace the combination meter (meter and 
A/C-ECU).

Main

Index

Group

TOC

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-41

Inspection Procedure 10: A/C pressure sensor system

A/C PRESSURE
SENSOR

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

COMBINATION
METER

SENSOR CIRCUIT

METER AND A/C-ECU

A/C Pressure Circuit

COMMENTS ON TROUBLE SYMPTOM

If the A/C pressure sensor is defective, the damaged 
wiring harness between the A/C pressure sensor and 
the combination meter (meter and A/C-ECU) may be 
suspected.

POSSIBLE CAUSES

• Malfunction of A/C pressure sensor

• Malfunction of the combination meter (meter and 

A/C-ECU)

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. M.U.T.-III data list
Check that the following service data display con-
tents are normal. (Refer to 

P.55A-44

.)

• Item 04: Pressure sensor

Q:  Is the check result normal?

YES : 

Go to Step 6.

NO : 

Go to Step 2.

Step 2. Connector check: A-02 A/C pressure 
sensor connector

AC313797

Connector: A-02

Harness side

AF

A-02 (B)

Q:  Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the connector.

Step 3. Inspection of A/C pressure sensor
 Refer to 

P.55A-51

.

Q:  Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the A/C pressure sensor.

Main

Index

Group

TOC

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-42

Step 4. Connector check: B-14 and B-15 
combination meter connector

AC401056

AI

Connectors: B-14, B-15

Harness side

B-15 (B)

B-15

B-14 (B)

Harness side

B-14

Q:  Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the connector.

Step 5. Check the wiring harness between B-14, 
B-15 combination meter connector (terminals 8, 
34 and 30) and A-02 A/C pressure sensor 
connector (terminals 2, 1 and 3).

AC313797

Connector: A-02

Harness side

AF

A-02 (B)

AC401056

AI

Connectors: B-14, B-15

Harness side

B-15 (B)

B-15

B-14 (B)

Harness side

B-14

Main

Index

Group

TOC

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-43

NOTE: 

AC401053

AD

Connector: B-41

Prior to the wiring harness inspection, check interme-
diate connector B-41, and repair if necessary.

• Check the input line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness.

Step 6. Recheck the trouble symptom

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00, How to 
Cope with Intermittent Malfunction 

P.00-13

).

NO : 

Replace the combination meter (meter and 
A/C-ECU).

Main

Index

Group

TOC

 

 

 

 

 

 

 

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