Throttle Position (TP) Sensor: Adjustment

Disconnect TP sensor connector. Connect ohmmeter between TP sensor connector terminals "E" and IDL. See Fig 1 . Loosen TP sensor attaching screws.
Insert a .006" (.15 mm) feeler gauge (MX-3 1.8L) or .010" (.25 mm) feeler gauge (all other models) between throttle lever and throttle stop screw. Rotate TP sensor clockwise about 30 degrees, then rotate counterclockwise until ohmmeter indicates continuity.
Remove feeler gauge. Insert a .020" (.50 mm) feeler gauge (MX-3 1.8L) or .016" (.40 mm) feeler gauge (all other models) between throttle lever and throttle stop screw. If ohmmeter indicates no continuity, go to next step. If ohmmeter indicates continuity, repeat adjustment procedure.
Tighten TP sensor attaching screws. Open throttle valve fully and verify resistance between terminals "E" and Vt is about 5000 ohms.

NOTE: TP sensor on MX-6 2.0L and 626 2.0L is not adjustable.

Fig 1: TP Sensor Conn. Term. ID (MX-3 1.6L A/T & 1.8L, Protege A/T, 323 A/T)

Courtesy of MAZDA MOTORS CORP.

TP SENSOR CONT

Test Condition ⁽¹⁾

⁽²⁾ Continuity

MX-3 1.8L,

.006" (.15 mm)

Yes

.020" (.50 mm)

All Others

.004" (.10 mm)

Yes

.024" (.60 mm)

⁽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.

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.
Loosen TP sensor screws. Rotate TP sensor clockwise about 30 degrees, then rotate counterclockwise until ohmmeter indicates continuity.
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.
Tighten TP sensor attaching screws. Open throttle valve fully a few times. Recheck TP sensor adjustment.

Fig 1: TP Sensor Conn. Terminal ID (MX-3 1.6L, Protege & 323 - M/T)

Courtesy of MAZDA MOTORS CORP.

TP SENSOR CONTINUITY

Condition

Continuity Between IDL & TL/E

Continuity Between POW & TL/E

Miata

.016" (.41 mm) ⁽¹⁾

Yes

.027" (.7 mm) ⁽¹⁾

WOT

Yes

MX-3 1.6L, Protege & 323

.004" (.10 mm) ⁽¹⁾

Yes

.039" (1.0 mm) ⁽¹⁾

WOT

Yes

⁽¹⁾	Insert feeler gauge of specified thickness between throttle lever and throttle stop screw.