Unfasten the throttle sensor connector, then connect an ohmmeter across
the A and D terminals. The resistance should
read 3.5–6.5 ohms.
Connect the ohmmeter across the B and D terminals.
Gradually open and close the throttle valve by hand while measuring the resistance.
When fully closed, the resistance should be approximately 1k ohms. When fully
open the resistance should read 3.5–6.5k ohms.
Fig. 1: Throttle position sensor terminal locations — 929
If the resistance readings are not as specified, check the throttle sensor
idle switch adjustment.
NOTE: To adjust the throttle sensor idle switch, you will
need a set of flat blade feeler gauges.
Connect an ohmmeter across the C and D terminals,
then check for continuity across the terminals with a feeler gauge inserted
between the throttle stopper screw and throttle valve lever. With a 0.02 in.
(0.5mm) feeler gauge inserted, there should be continuity. With a 0.03 in.
(0.7mm) feeler gauge, there should be no continuity.
If the switch is not adjusted properly, loosen the throttle sensor retaining
screws and move the sensor as required until the continuity readings are as
specified. After the adjustment, seal the screws with white paint to retain
the setting.
