nsxb11128a.pdf

Idle Control System
Idle Speed Setting
Inspection/Adjustment
NOTE: Before setting the idle speed, check the following
items:
— The Check Engine light has not been reported on.
— Ignition timing
— Spark plugs
— Air cleaner
— PCV system
1. Start the engine. Hold the engine at 3,000 rpm with
no load (A/T in position, M/T in neutral) until
the radiator fan comes on, then turn the ignition
switch OFF.
2. Connect the SCS service connector to service check
connector.
3. Connect a OBDII scan tool (see page 11-38) or
tachometer.
• Connect a tachometer to loop of igniter unit sec-
ondary, or…
TACHOMETER
Remove the rubber cap from the tachometer
connector and connect a tachometer.
TACHOMETER
RUBBER
CAP
TACHOMETER
CONNECTOR
4. Restart the engine.
5. Check idling in no-load conditions in which the
headlights, blower fan, rear defogger, cooling fan,
and air conditioner are not operating.
NOTE: Do not depress the accelerator pedal in this
step.
Idle speed should be:
Adjust the idle speed, if necessary, by turning the
idle adjusting screw.
NOTE: After adjusting the idle speed in this step,
check the ignition timing (see section 23).
If it is out of spec, go back to step 4.
IDLE ADJUSTING
SCREW

6. Disconnect the SCS service connector.
7. Depress the accelerator pedal and stabilize the
engine speed at 1,000 rpm, then slowly release the
pedal until the engine idles, then check the idle
speed.
Idle speed should be: