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AUTOMATIC AIR CONDITIONING SYSTEM
(T2031 4-7
T TROUBLESHOOTING
1 . Precautions
1) Never connect the battery in reverse polarity.
o The Auto A/C control unit will be destroyed instantly .
2) Do not disconnect the battery terminals while the
engine is running .
0 A large counter electro motive force will be gener-
ated in the alternator, and this voltage may damage
electronic parts such as Auto amp . (Auto A/C control
unit)
3) Before disconnecting the connectors of each sensor
and the Auto amp ., be sure to turn off the ignition
switch .
Otherwise, the Auto amp . may be damaged .
4) Every Auto A/C-related part is a precision part . Do
not drop them .
2. Pre-inspection
Before troubleshooting check the following items .
1 . POWER SUPPLY
1) Measure battery voltage and specific gravity of elec-
trolyte .
Standard voltage: 12V
Specific gravity : Above 1 .260
2) Check the condition of the fuses for A/C . heater and
other fuses.
3) Check the condition of the harnesses and harness
connectors connection .
2. REFRIGERANT LINE
1) Check contact for refrigerant line .
2) Check amount of refrigerant .
Refer to the Sight Glass Inspection .
3. CONTROL LINKAGE
1) Check state of mode door control rod and linkage.
2) Check state of air mix door control rod and linkage.
3) Check state of intake door control rod and linkage.
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Table of Contents
Troubleshooting
