Honda Civic Service Manual page 492

ldle Control System
ldle Speed Setting (cont'dl
Inspeqtion/Adiustment
38 D16Y5 engine whh M/T,'99 - 00 81642 engine
NOTE: Before setting the idle speed, check the follow-
ing items;
- The MIL has not been reported on.
-
lgnition timing
-
Spark plugs
- Air cleaner
-
PCV system
'1.
Start the engine. Hold the engine at 3,000 rpm with
no load (transmission in neutral) until the radiator
fan comes on, then let it idle.
Connect a tachometer.
Disconnect the IAC valve 2P connector and the EVAP
purge controlsolenoid valve 2P connector.
EVAP PURGE
CONTROL
SOLENOID VALVE
lf the engine stalls, restart the engine with the accel-
erator pedal slightly depressed. Stabilize the rpm at
1.000, then slowly release the pedal until the engine
idles.
Check idling in no-load conditions: headlights, blower
fan, rear defogger, radiator fan, and air conditioner
are not operating.
ldl€ speed should be:
450 i 50 rpm
11-222
lf necessary, adjust the idle speed, by removrng lne
cap and turning the idle adjusting screw.
After adjusting the idle speed recheck the ignitlon
timing (see section 23). lf it is out of spec, go back
to step 4.
|DLE
6. Turn the ignition switch OFF.
7. Reconnect the 2P connectors to the IAC valve and
the EVAP purge control solenoid valve, then do the
ECM reset procedure.
8. Restart and idle the engine with no-load conditions
for one minute, then check the idle sDeed.
ldle speed should bo:
USA:
D16Y5 engine: 670 i 50 rpm
81642 engine: 700 i 50 rpm
Canada:
81642 engine: 750 t 50 rpm
NOTE: lf the idle speed increases to 8lO t 50 rpm,
this means the EVAP system is purging the canister.
To stop the purging temporarily, raise the engine
speed above 1,000 rpm with the accelerator pedal,
then slowly release the pedal.
9 . l d l e t h e e n g i n e f o r o n e m i n u t e w i t h h e a d l i g h t s
(Low) ON. and check the idle speed.
ldle speed should be:
750 i 50 rpm
1 0 . T u r n t h e h e a d l i g h t s o f f . l d l e t h e e n g i n e f o r o n e
minute with heater fan switch at Hl and air condi-
tioner on, then check the idle soeed.
ldls speed should be:
810 t 50 rpm
l f t h e i d l e s p e e d i s n o t w i t h i n s p e c i f i c a t i o n , s e e
Symptom Chart on page 11-84.