2-10
Testing Sensors
Section
2
TEST A - Throttle Position Sensor
Important: If more than one hook-up is shown, it means more than one test is
required to check all parts of the sensor. Do all tests shown for your sensor.
The letter next to the hook-up refers to the test procedure.
Sensor may be tested on or off vehicle. (Exception: On-car test only for most
Honda - sensor permanently attached to throttle body.)
Warning: Observe all safety precautions (see page ii) if testing sensor on
vehicle.
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 sensor - Inspect for
damage.
Some vehicles use a metal snap ring to secure wiring harness
to sensor. Remove this snap ring before disconnecting wiring
harness.
4) Off-Car testing only: Remove sensor.
IMPORTANT: Many throttle position sensors require special
adjustment when reinstalled. Refer to vehicle service manual
for adjustment procedure. A good sensor will not perform
properly if incorrectly adjusted.
5) Connect test leads.
Connect TEST leads according to diagram A 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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