PL720 4WD L4-2389cc 2.4L SOHC (Z24) (1983)
Fig. 14 Throttle valve switch adjustment
Perform throttle valve switch test as illustrated in Fig. 12.
Prior to testing, ensure choke valve is fully open. If resistances are not as specified, check and adjust throttle valve switch as follows:
1.
Disconnect throttle valve switch electrical connector from carburetor.
2.
Connect jumper wires between air/fuel ratio and anti-diesel solenoid terminals, Fig. 13.
3.
Ensure continuity does not exist between throttle valve switch electrical connector and ground, Fig. 13.
4.
Run engine at approximately 2000 RPM and ensure continuity exists between throttle valve switch electrical connector and ground.
5.
Gradually decrease engine speed to 1300-1400 RPM on 1985 models, or 1150-1450 RPM on 1986 models and ensure circuit continuity breaks.
6.
If circuit continuity is not broken at specified engine speed, adjust throttle valve switch as follows:
a. Manually open the throttle to hold engine speed at approximately 1350 RPM on 1985 models, or 1250-1350 RPM on 1986 models. Do not
use idle speed screw.
b. Slowly turn adjusting screw, Fig. 14, in either direction until ohmmeter indicates an open circuit.
c. Recheck adjustment, then adjust idle speed if necessary.