Mitsubishi L200. Manual - part 847

 

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Mitsubishi L200. Manual - part 847

 

 

SPECIAL TOOL

HEATER, AIR CONDITIONER AND VENTILATION

55A-4

SPECIAL TOOL

M1551000600740

Tool

Number

Name

Use

B991367

MB991367

Special spanner

Removal and installation 
of A/C compressor 
armature mounting nut

MB991386

Pin

MB991223

a

d

c

b

DO NOT USE

BA

MB991223

a. MB991219
b. MB991220 
c. MB991221
d. MB991222

Harness set

a. Test harness
b. LED harness
c. LED harness adapter
d. Probe

Making voltage and 
resistance 
measurements during 
troubleshooting

a. Connect pin contact 

pressure inspection

b. Power circuit 

inspection

c. Power circuit 

inspection

d. Commercial tester 

connection

MB992006

MB992006

Extra fine probe

Continuity check and 
voltage measurement at 
harness wire or 
connector

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

M1554004700997

Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points .

TROUBLE SYMPTOM CHART

M1554005002265

Trouble symptom

Inspection procedure 
number

Reference page

Cool air does not come

1

P.55A-6

The blower does not work

2

P.55A-17

The blower air volume cannot be changed

3

P.55A-26

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-5

The A/C compressor and clutch assembly does not work 4

P.55A-30

Condenser fan does not operate <Vehicles with 
condenser fan>

5

P.55A-36

The rear window demister does not work

6

P.55A-42

The PTC heater does not work <Vehicles with PTC 
heater>

7

P.55A-53

Trouble symptom

Inspection procedure 
number

Reference page

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-6

SYMPTOM PROCEDURES

Inspection Procedure 1: Cool air does not come

A/C Compressor Control Circuit

IGNITION
SWITCH (IG2)

BLOWER
RELAY

BLOWER
SWITCH

A/C
SWITCH
MODULE

A/C
EVAPORATOR
AIR OUTLET
THERMISTOR

DUAL
PRESSURE
SWITCH

LOW-
PRESSURE
SIDE

HIGH-
PRESSURE
SIDE

ENGINE-ECU

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

ACB01739

ENGINE-ECU

<EURO5>

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

A/C Compressor and Clutch Assembly Circuit

IGNITION 
SWITCH (IG2)

RELAY 
BOX

A/C COMPRESSOR 
RELAY

A/C 
COMPRESSOR 
AND CLUTCH 
ASSEMBLY

ENGINE-ECU

FUSIBLE 
LINK

20

A/C 
COMPRESSOR 
CLUTCH ASSEMBLY

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-7

CIRCUIT OPERATION
While the engine is running, with the blower switch 
ON, and when the temperature control dial is set to 
MAX COOL, if cool air does not come out from the 
vents, A/C compressor control circuit system may be 
defective.

PROBABLE CAUSES

• Malfunction of the A/C evaporator air outlet ther-

mistor

• Malfunction of the dual pressure switch

• Malfunction of the engine-ECU

• Damaged the wiring harness or connectors

• Improper amount of refrigerant

 

 

 

 

 

 

 

Content   ..  845  846  847  848   ..