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BASIC IDLE SPEED ADJUSTMENT

NOTE

(1) The standardidlingspeed has been adjusted, by the
speed adjusting screw (SAS), by the manufacturer;
and there should usually be no need for readjustment.

(2) If the adjustment has been changed by mistake, the
idle speed may become too high or the idle speed
may drop too low when loadsfromcomponents such
as the AC are placed on the engineIf this occurs,
adjust by the following procedure

(3) The adjustment;, if made, should be made after first
confirming that the spark plugs, the injectors, the idle
speed control servo, the compression pressure, etc ,
are all normal:

Perform inspection , with the vehicles in the following
condition:
Engine coolant temperature: 80 _ 95*C
Lights and all accessories: OFF
Transmission:Neutral (P range for vehicles with
automatic transmission)

2Connect the MUT-II to the diagnosis connector (16-pin):
NOTE

When the MUT-II is connected, the diagnosis control
terminal should be earthed.

3Start the engine and run at idle
Select the item No. 30 of the MUT-II Actuator test;

NOTE

This holds the ISC servo at the basic step to adjust the
basic idle speed:

5Check the idle speed:

Standard value: 700 + 50 rlmin

NOTE

(1) The engine speed may be 20 to 100 rlmin lower than
indicatedabovefornewvehicle[driven
approximately 500 km or less], but no adjustment is
necessary

(2) If the engine stalls or the engine speed is Iow even
though the vehicle has been driven approximately 500
km or more, it is probable that deposits are adhered to
the throttle valve, s0 clean it:

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