EMISSION CONTROL
Evaporative Emission Control System
PURGE CONTROL SYSTEM INSPECTION <Turbo>
Canister
Purge control
valve
PI
I
I
relay
Barometric pressure sensor
Intake air temperature sensor
Engine coolant temperature sensor
I
I
I I
Air flow sensor
Engine control unit
(1) Disconnect the purge air hose from the air intake hose, and
plug the air intake hose. Then, connect the hand vacuum
pump to the purge air hose.
(2) Under the engine conditions shown below, check by
applying vacuum from a hand vacuum pump.
When engine is cold
engine coolant temperature:
(140°F) or less
Engine operating
condition
Applying vacuum
Result
Idling
375
Vacuum is maintained
3,000 rpm
(14.8
When engine is hot
engine coolant temperature:
(158°F) or higher
Engine operating
condition
Idling
3,000 rpm within
three minutes after
starting engine
3,000 rpm after
three minutes
have elapsed
after starting
engine
Applying vacuum
375
(14.8
Try applying
vacuum
375
(14.8
Result
Vacuum is
Vacuum leaks
Vacuum
be main-
tained
momentarily, after
which it will leak.
NOTE
The vacuum
leak con-
tinuously if the altitude
is 2,200 m
ft.) or
or the
temperature is 50°C
(122°F) or higher.
TSB Revision
Summary of Contents for 3000GT 1991
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Page 876: ...42 4 BODY SDecial Tools SPECIAL TOOLS M42DA remover TSB Revision...
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Page 942: ...EXTERIOR SDecial Tools SPECIAL TOOLS MBlKG I system inspectlon MB991 359 TSB Revision...
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