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Home >> Mazda >> 1994 >> MX-5 Miata Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Throttle Position (TP) Sensor >> Adjustment
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Throttle Position (TP) Sensor: Adjustment

  1. Disconnect TP sensor connector. Connect ohmmeter between TP sensor connector terminals "E" and IDL. See Fig 1. Loosen TP sensor attaching screws.
  2. Insert a .010" (.25 mm) feeler gauge between throttle lever and throttle stop screw. Rotate TP sensor clockwise about 30 degrees, then rotate counterclockwise until ohmmeter indicates continuity.
  3. Remove feeler gauge. Insert a .016" (.40 mm) feeler gauge between throttle lever and throttle stop screw. If ohmmeter indicates no continuity, go to next step. If ohmmeter indicates continuity, repeat adjustment procedure.
  4. Tighten TP sensor attaching screws. Open throttle valve fully and verify resistance between terminals "E" and Vt is about 5000 ohms.
Fig 1: TP Sensor Connector Terminal ID (A/T)
G90E18352Courtesy of MAZDA MOTORS CORP.
TP SENSOR CONTINUITY

Test Condition (1) (2) Continuity
.004" (.10 mm) Yes
.024" (.60 mm) No
(1) Insert feeler gauge of specified thickness between throttle lever and throttle stop screw.
(2) Check continuity with ohmmeter connected between TP sensor terminals "E" and IDL.


  1. Disconnect TP sensor connector. Connect ohmmeter between terminals IDL and TL/E of TP sensor connector. See Fig 1. Insert a .016" (.41 mm) feeler gauge between throttle lever and throttle stop screw.
  2. Loosen TP sensor screws. Rotate TP sensor clockwise about 30 degrees, then rotate counterclockwise until ohmmeter indicates continuity.
  3. Remove feeler gauge. Insert a .027" (.69 mm) feeler gauge between throttle lever and throttle stop screw. If ohmmeter indicates no continuity, go to next step. If ohmmeter indicates continuity, repeat adjustment procedure.
  4. Tighten TP sensor attaching screws. Open throttle valve fully a few times. Recheck TP sensor adjustment.
Fig 1: TP Sensor Connector Terminal ID (M/T)
G92I24933Courtesy of MAZDA MOTORS CORP.
TP SENSOR CONTINUITY

Condition Continuity Between IDL & TL/E Continuity Between POW & TL/E
.016" (.41 mm) (1) Yes No
.027" (.7 mm) (1) No No
WOT No Yes
(1) Insert feeler gauge of specified thickness between throttle lever and throttle stop screw.
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