FUEL SYSTEM
VALVE>
inspection of
Components
AIR CONDITIONING SWITCH AND A/C COMPRESSOR CLUTCH RELAY
Air conditioning switch
Sub
Air conditic
clutch
Magnetic
clutch
control unit
Auto compressor
- -
Engine control
module
7
‘1
Engine control module connector
OPERATION
l
The air conditioning switch applies battery vol-
tage to the engine control module when the air
conditioning is switch is switched ON.
TROUBLESHOOTING HINTS
If the air conditioning compressor’s magnetic clutch
is not activated when the air conditioning switch is
switched ON during idling, it is probable that the
l
When the air conditioning signals are input, the
engine control module activates the idle-speed
control motor, and also switches ON the power
transistor.
a result, current flows to the
power relay coil and the relay switch is
switched ON, the air conditioning compressor’s
magnetic clutch is activated.
cause is a malfunction of the air conditioning control
system.
TSB Revision
Summary of Contents for 1989 Galant
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