29
Idle speed
Caution:
Check and adjust the idle speed after all other items of
the engine have been adjusted to the specified ranges.
For this model, the idle speed is controlled by an ECU.
Since the intake flow at idle speed has been properly
adjusted upon delivery, do not adjust the idle speed
adjusting screw as desired. In case the idle speed is
unsteady, zero or too high, find out the possible causes
with the troubleshooting method for the EMS system
and eliminate the trouble.
Under the monitoring of the maintaining and diagnostic
instrument, check whether the ignition advance angle is
between 0
°
-15
°
. If the ignition advance angle is more
than 15
°
, it indicates the throttle valve’s intake flow at
idle speed is insufficient, and at this point, the idle speed
is unstable or null; if the ignition advance angle is less
than 0
°
, it indicates the intake flow at idle speed is too
big, and at this point, the idle speed is often as high as
more than 1800 r/min. Only under the above two cases,
unscrew the retaining nut and adjust the idle speed
adjusting screw to let the intake flow reach the specified
flow.
Idle speed 1500 r/min
±
150 r/min.
After adjusting toe-in, remember to screw up the
retaining nut.
Idling speed adjusting
screw
Summary of Contents for Five Hundred 400
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