Throttle Body: Testing and Inspection

ON-VEHICLE INSPECTION

1. INSPECT THROTTLE BODY





(a) Check that the throttle linkage moves smoothly.








(b) Check the vacuum at each port.
^ Start the engine.
^ Check the vacuum with your finger.





2. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the sensor connector.
(b) Insert a thickness gauge between the throttle stop screw and stop lever.








(c) Using an ohmmeter, measure the resistance between each terminal.
(d) Reconnect the sensor connector.