Auxiliary Air Valve - Toyota 4A-FE Repair Manual

4A-FE
EFI SYSTEM - Air Induction System
Fl-131
Auxiliary Air Valve
t
Coolant
Auxiliary Air Valve
Valve
ON-VEHICLE INSPECTION
INSPECT AIR VALVE OPERATION
(w/o Air Flow Meter)
(a) Remove the air cleaner hose.
F10897
(b)
Check the engine rpm
by
closing the air port on the
throttle body.
At low temp. (Coolant temp.: below 80°C (176°F))
• The engine RPM should drop.
After warm-up
• Check that engine RPM does not drop more than
100 rpm.
(c)
Install
the
air cleaner hose.
If operation
is
not
as
specified, replace the air valve.
(w/ Air Flow Meter)
Check the engine rpm by fully screwing in the idle speed
adjusting screw.
At low temp . (Coolant temp.: below 80°C (176°F)}
• When the
idle speed adjusting screw is in, the
engine rpm should drop.
After warm-up
• When the idle speed adjusting screw is in, the
engine rpm should drop below idle speed duel
stop.
If operation is not as specified, replace the air valve .