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Throttle Position (TP) Sensor: Inspection

NOTE: Perform all testing procedures with engine at normal operating temperature.
  1. Disconnect negative battery cable. Disconnect electrical connector from TP sensor. Loosen TP sensor retaining screws.
  2. To check proper TP sensor operation, using ohmmeter, check resistance or continuity with selected feeler gauge thickness between throttle lever and stop screw. See Figure and Figure . See THROTTLE POSITION (TP) SENSOR RESISTANCE table.
  3. If TP sensor resistances are not as specified, adjust or replace TP sensor. See PRIZM procedure under ADJUSTMENTS. Once properly adjusted, reconnect electrical connector.
THROTTLE POSITION (TP) SENSOR RESISTANCE

Application Ohms
Prizm & Prizm LSi
Between Terminals E2 & IDL (3) 0-2300
Between Terminals E2 & IDL (1) Infinity
Between Terminals E2 & VC 4000-8500
Between Terminals E2 & VTA (4) 200-6000
Between Terminals E2 & VTA (2) 3300-10,000
(1) With .035" (.89 mm) feeler gauge installed between throttle stop screw and lever.
(2) Throttle valve at fully open position.
(3) With .016" (.40 mm) feeler gauge installed between throttle stop screw and lever.
(4) With zero clearance between throttle stop screw and lever.
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