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MPI SYSTEM
SERVICE ADJUSTMENT PROCEDURES
Y31DJOA
Idle Speed Check Procedure
CAUTION
The improper setting (throttle valve opening) will increase
exhaust gas temperature at deceleration. reducing catalyst life
greatly and deteriorating exhaust gas cleaning performance.
It also has effect on fuel consumption and engine braking.
Checking conditions:
Z31DKOB
o
Engine coolant temperature is 80 to 95°C (176 to 205°F).
o
Lights, electric cooling fan and all accessories are off.
o
Transaxle is in neutral ["P" or "N" range for AIT vehicles).
o
Steering wheel is a straight ahead position (Vehicles with
power steering).
1.
Install the tachometer and the timing light, or connect the
multi-use tester to the diagnostic connector in the fuse box.
2.
Run the engine at curb idle speed.
3.
Check the basic ignition timing and adjust if necessary.
Refer to Group 27.
4.
Run the engine for more than 5 seconds at an engine speed
of 2,000 to 3,000 rpm.
5.
Run the engine at idle for 2 minutes.
6.
Read the idling rpm. If the multi-use tester is used, press
code No.22 and read the idling rpm. If it is not within the
specified valve, check the idle speed control system.
Curb idle rpm
750
±
100 rpm
31-28
09273-24000
31Z282
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