Throttle Position (TP) Sensor

Disconnect negative battery cable and TP sensor connector. See Fig 1 . Using an ohmmeter, check resistance between indicated terminals. See the THROTTLE POSITION (TP) SENSOR RESISTANCE table.
If resistance is not as specified, adjust TP sensor. See appropriate ADJUSTMENTS article. If resistance is not as specified after adjustment, replace TP sensor. For further diagnostic procedures, see appropriate BASIC TESTING article. Since many computer-controlled and monitored components set a Diagnostic Trouble Code (DTC) if they malfunction, also perform procedures in appropriate TESTS W/CODES article.

THROTTLE POSITION (TP) SENSOR RESISTANCE

Application

Ohms

Between Terminals "A" & "C"

⁽¹⁾ 100-20,000

Between Terminals "A" & "D"

2870-5330

⁽¹⁾	Varies with throttle position.

Fig 1: Identifying Throttle Position (TP) Sensor Terminals

Courtesy of GENERAL MOTORS CORP.