Throttle Position (TP) Sensor

NOTE: To identify TP sensor terminals, see Fig 1 .

THROTTLE POSITION (TP) SENSOR RESISTANCE (Tracker)

Application

Ohms

MFI

Between Terminals No. 1 & 2

⁽¹⁾ 0-500

Between Terminals No. 1 & 2

⁽²⁾ Infinity

Between Terminals No. 1 & 3

3500-6500

Between Terminals No. 1 & 4

⁽³⁾⁽⁵⁾ 300-2000

Between Terminals No. 1 & 4

⁽⁴⁾⁽⁵⁾ 2000-6500

TBI

Between Terminals No. 2 & 4

3500-6500

Between Terminals No. 3 & 4

⁽⁶⁾ 0-500

Between Terminals No. 3 & 4

⁽⁷⁾ Infinity

Between Terminals No. 4 & 5

⁽³⁾⁽⁵⁾⁽⁸⁾ 300-2000

Between Terminals No. 4 & 5

⁽⁴⁾⁽⁵⁾ 2000-6500

⁽¹⁾	With .020" (.51 mm) feeler gauge installed between throttle stop screw and lever.

⁽²⁾	With .031" (.79 mm) feeler gauge installed between throttle stop screw and lever.

⁽³⁾	Throttle valve at idle position.

⁽⁴⁾	Throttle valve at fully open position.

⁽⁵⁾	There should be more than 2000 ohms resistance in TP sensor between idle position and fully open position.

⁽⁶⁾	With .012" (.30 mm) feeler gauge installed between throttle stop screw and lever.

⁽⁷⁾	With .022" (.56 mm) feeler gauge installed between throttle stop screw and lever.

⁽⁸⁾	When checking resistance at idle position, apply 19.7 in. Hg vacuum to throttle opener to move throttle valve to idle position.

Fig 1: Throttle Position Sensor Terminals (TBI)

Courtesy of GENERAL MOTORS CORP.