Idle Speed Control (Isc) Servo (Stepper Motor) Check - Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement

Main hose
Injector
Battery
MPI – MPI –
On-vehicle Service On-vehicle Service
7. Activate the injector and check the atomized spray
Return hose
8. Stop the actuation of the injector, and check for leakage
9. Activate the injector without activating the fuel pump; then,
10. Disconnect the MUT-II.
IDLE SPEED CONTROL (ISC) SERVO
(STEPPER MOTOR) CHECK
Checking the Operation Sound
1. Check that the engine coolant temperature is 20 C or
Idle speed
control servo
2. Check that the operation sound of the stepper motor can
3. If the operation sound cannot be heard, check the stepper
Checking the Coil Resistance
1. Disconnect the idle speed control servo connector.
2. Measure the resistance between terminal 2 and either
3. Measure the resistance between terminal 5 and either
condition of the fuel.
The condition can be considered satisfactory unless it
is extremely poor.
from the injector's nozzle.
Standard value: 1 drop or less per minute
when the spray emission of fuel from the injector stops,
disconnect the special tool and restore it to its original
condition.
below.
NOTE
Disconnecting the engine coolant temperature sensor
connector and connecting the harness-side of the
connector to another engine coolant temperature sensor
that is at 20 C or below is also okay.
be heard after the ignition is switched ON. (but without
starting the motor.)
motor's activation circuit.
If the circuit is normal, it is probable that there is a
malfunction of the stepper motor or of the engine control
unit.
terminal 1 or terminal 3 of the connector at the idle speed
control servo side.
Standard value: 28–33 Ω (at 20 C)
terminal 6 or terminal 4 of the connector at the idle speed
control servo side.
Standard value: 28–33 Ω (at 20 C)
13B-75
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