Repair Manual

17
IGNITION AND INJECTION
17 - 9
REGULATOR OF IDLE RUNNING
This regulator (drawing 1, position 9) is used to position the valve in order to obtain
the idle rotation. It is mounted into a case together with a switch. The idle running is
realized at the moment of switch contact closing (position 4), being necessary to the
normal idle functioning or to the engine brake.
The computer sends an electric signal to the regulator through the pins 32 and 34. The
regulator will position the valve in order to obtain the idle rotation (800 ± 50 rot/min).
Components:
1 - Electric motor step by step
2 - Endless screw
3 - Endless screwed wheel
4 - Switch
5 - Protection buffer
The switch connector and the idle motion actuator consist of:
1, 2 - Actuator supply
( pin 32, pin 34 computer ).
3 - Idle motion switch
( pin 8 computer ).
4 - Mass
By connecting an ohmmeter to the
connector wires 3 and 4, one can see that
the switch positions:
-CLOSE – functioning status,
continuity
-OPEN – stand-by status, R =
Reference values measured at the
connected wires:
R
3-4
= 0 – 200 Ù – contact close
R
3-4
> 1 MÙ– contact open
R
1-2
= 4 – 250 Ù
DESCRIPTION OF THE SYSTEM
vnx.su