nsxd11102a.pdf

Idle Control System
Idle Speed Setting
Inspection/Adjustment
NOTE: (Canada) Pull the parking brake lever up.
Start the engine, then check that the head lights
are off.
1. Start the engine and warm it up to normal operating
temperature (the cooling fan comes on).
2. Connect a tachometer.
Connect a tachometer to loop of ICM second-
ary, or…
TACHOMETER
ICM
Remove the rubber cap from the tachometer
connector and connect a tachometer.
TACHOMETER
TACHOMETER
CONNECTOR
RUBBER
CAP
3. Disconnect the 2P connector from the IAC valve.
IAC VALVE
4. Start the engine with the accelerator pedal slightly
depressed, then turn the headlights and rear defog-
ger ON. After the MIL comes on, stabilize the
engine speed at 1000 rpm, then slowly release the
pedal until the engine idles.
If the engine stalls, turn the idle adjusting screw
one turn counterclockwise and recheck.
5. Check idling with the headlights and rear defogger
on.
Idle speed should be:
M/T
A/T
550 ± 50 rpm
550 ± 50 rpm (in or range)
Adjust the idle speed, if necessary, by turning
the idle adjusting screw.
If the proper idle speed cannot be achieved,
clean the throttle body port with carburetor
cleaner.
IDLE ADJUSTING
SCREW

6. Turn the ignition switch OFF.
7. Reconnect the 2P connector on the IAC valve, then
remove CLOCK fuse in the under-hood fuse/relay
box for 10 seconds to reset ECM.
8. Restart and idle the engine with no-load conditions
in which the headlights, blower fan, rear defogger,
cooling fan, and air conditioner are not operating
for one minute, then check the idle speed.
Idle speed should be:
M/T
A/T
800 50 rpm
750 50 rpm
(in or range)