FUEL SYSTEM
On-vehicle Inspection of MPI Components
AIR CONDITIONER POWER RELAY
Function
Item No. Data display
Data reading
49
Air condi-
tioner relay
state
Check condition
Engine: Idling after
warm-up
HARNESS INSPECTION
Air conditioner switch
Normal indication
OFF
OFF (compressor
clutch non-activa-
tion)
ON
ON (compressor
clutch activation)
unit harness
side connector
Measure the power supply voltage of
the air conditioner circuit.
l
Air conditioner switch: ON
l
Engine control unit connector:
Disconnected
l
Ignition switch: ON
l
Dual air conditioner switch: ON
Voltage
STOP
Check the air
conditioner
circuit.
AIR CONDITIONER INSPECTION
Refer to GROUP 55 Service Adjustment Procedures.
TSB Revision
Summary of Contents for 3000GT 1991
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