Throttle Position Sensor: Testing and Inspection

INSPECTION





1. Check that the throttle linkage moves smoothly.






2. Check the vacuum at each port.
^ Start the engine.
^ Check the vacuum with your finger:

Port E
at idle: no vacuum
at 3500 rpm: vacuum

Port R
at idle: no vacuum
at 3500 rpm: vacuum

Port P
at idle: no vacuum
at 3500 rpm: vacuum

3. Measure the resistance between the Throttle Position Sensor (TPS)terminals.
^ Unplug the connector from the sensor.





^ Insert a thickness gauge between the throttle stop screw and stop lever.
^ Using an ohmmeter, check the resistance between each terminal:

Between terminals VTA and E2 with 0 clearance at throttle stop screw:
0.47 and 6.1 k ohms

Between terminals IDL and E2 with 0.57 mm (0.0224 in) clearance at stop screw:
2.3 k ohms or less

Between terminals IDL and E2 with 0.85 mm (0.0335 in) clearance at stop screw:
infinity

Between terminals VTA and E2 with throttle valve fully open:
3.1 to 12.1 k ohms

Between terminals VC and E2:
3.9 to 9.0 k ohms

4. If resistance measures out of specification, adjust TPS and recheck.