TEST B - Throttle Position Switch
Important: If more than one hook-up is shown, it means more than one test is
required to check all parts of the switch. Do all tests shown for your switch. The
letter next to the hook-up refers to the test procedure.
Switch may be tested on or off vehicle.
Warning: Observe all safety precautions (see page ii) if testing sensor on
vehicle.
2-12
Testing Sensors
Section
2
1) Verify ignition key is OFF.
2) Check Tester battery
Refer to page 1-4. Set RANGE switch to POWER OFF when
done.
3) Disconnect wiring harness from switch - Inspect for
damage.
Some vehicles use a metal snap ring to secure wiring
harness to switch. Remove this snap ring before disconnect-
ing wiring harness.
4) Off-Car testing only: Remove switch.
IMPORTANT: Many throttle position switches require special
adjustment when reinstalled. Refer to vehicle service manual
for adjustment procedure. A good switch will not perform
properly if incorrectly adjusted.
5) Connect test leads.
Connect TEST leads according to diagram B in the compo-
nent drawing.
6) Verify test clips make good contact and do not touch
each other.
Make sure unused clips are not touching anything.
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