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Throttle Position (TP) Sensor

NOTE: To identify TP sensor terminals, see Fig 1 .
THROTTLE POSITION (TP) SENSOR RESISTANCE

Application Ohms
Standard Emissions
Between Terminals 1 & 2 (1) 0-5000
Between Terminals 1 & 2 (2) 0-5000
Between Terminals 1 & 2 (3) Infinity
Between Terminals 1 & 3 (1) 240-1140
Between Terminals 1 & 3 (4) 3170-6600
Between Terminals 1 & 4 4370-8130
Upgraded Emissions (5)
(1) Throttle valve at idle position.
(2) With .012" (.30 mm) feeler gauge installed between throttle stop screw and lever.
(3) With .035" (.89 mm) feeler gauge installed between throttle stop screw and lever.
(4) Throttle valve at fully open position.
(5) On upgraded emission vehicles, install .14" (3.5 mm) feeler gauge between throttle stop screw and throttle lever. If Idle Speed Control (ISC) motor plunger contacts throttle lever screw, bring engine to operating temperature. Using a Tech 1 connected to DLC, ensure TP sensor voltage is .98-1.02 volts. Adjust or replace TP sensor as necessary.
Fig 1: Throttle Position Sensor Terminals (Standard Emissions Shown)
G94B44371Courtesy of GENERAL MOTORS CORP.
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