MTC-1
MANUAL AIR CONDITIONER
J AIR CONDITIONER
CONTENTS
C
D
E
F
G
H
I
K
L
M
SECTION MTC
A
B
MTC
Revision: November 2005 2005 Pathfinder
PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
Precautions for Working with HFC-134a (R-134a) ..... 4
Contaminated Refrigerant ........................................ 4
General Refrigerant Precautions .............................. 5
Precautions for Leak Detection Dye ......................... 5
A/C Identification Label ............................................ 6
Precautions for Refrigerant Connection ................... 6
FEATURES OF NEW TYPE REFRIGERANT
CONNECTION ...................................................... 6
O-RING AND REFRIGERANT CONNECTION ..... 7
Precautions for Servicing Compressor ..................... 9
Precautions for Service Equipment .......................... 9
RECOVERY/RECYCLING EQUIPMENT .............. 9
ELECTRONIC LEAK DETECTOR ........................ 9
VACUUM PUMP ................................................. 10
MANIFOLD GAUGE SET .................................... 10
SERVICE HOSES ............................................... 10
SERVICE COUPLERS .........................................11
REFRIGERANT WEIGHT SCALE .......................11
CHARGING CYLINDER .......................................11
Wiring Diagrams and Trouble Diagnosis .................11
PREPARATION ......................................................... 12
Special Service Tools ............................................. 12
HFC-134a (R-134a) Service Tools and Equipment ... 12
Commercial Service Tools ...................................... 15
REFRIGERATION SYSTEM ..................................... 16
Components ........................................................... 16
REFRIGERATION SYSTEM ............................... 16
Refrigerant Cycle ................................................... 17
REFRIGERANT FLOW ....................................... 17
FREEZE PROTECTION ..................................... 17
Refrigerant System Protection ............................... 17
REFRIGERANT PRESSURE SENSOR ............. 17
PRESSURE RELIEF VALVE ............................... 18
LUBRICANT .............................................................. 19
Maintenance of Lubricant Quantity in Compressor ...19
LUBRICANT ........................................................ 19
CHECKING AND ADJUSTING ............................ 19
AIR CONDITIONER CONTROL ............................... 21
Description ..............................................................21
Operation ................................................................ 21
AIR MIX DOOR CONTROL ................................. 21
BLOWER SPEED CONTROL ............................. 21
INTAKE DOORS CONTROL ............................... 21
MODE DOOR CONTROL ................................... 21
DEFROSTER DOOR CONTROL ........................ 21
MAGNET CLUTCH CONTROL ........................... 21
Description of Control System ................................ 23
Control Operation ................................................... 24
TEMPERATURE CONTROL DIAL (TEMPERA-
TURE CONTROL) ............................................... 24
RECIRCULATION () SWITCH ............................. 24
DEFROSTER () SWITCH .................................... 24
REAR WINDOW DEFOGGER SWITCH .............24
OFF SWITCH (BLOWER SPEED SET TO 0) ..... 24
A/C SWITCH ....................................................... 24
MODE DIAL ......................................................... 24
FRONT BLOWER CONTROL DIAL .................... 24
Discharge Air Flow ................................................. 25
FRONT ................................................................ 25
System Description ................................................. 26
SWITCHES AND THEIR CONTROL FUNCTION ...26
CAN Communication System Description .............. 27
TROUBLE DIAGNOSIS ............................................ 28
CONSULT-II Function (BCM) ................................. 28
CONSULT-II BASIC OPERATION ....................... 28
DATA MONITOR ................................................. 29
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ...................................................... 30
WORK FLOW ...................................................... 30
SYMPTOM TABLE ..............................................30
Component Parts and Harness Connector Location ... 31
ENGINE COMPARTMENT ..................................31
FRONT PASSENGER COMPARTMENT ............ 32
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