Disconnect electrical connector from throttle position switch. Loosen throttle switch retaining screws. Insert a .028" (.71 mm) feeler gauge between throttle lever and stop screw. Using ohmmeter, ensure continuity exists between terminals E2 and IDL on throttle switch. See Fig 1 .
Remove feeler gauge and insert a .032" (.81 mm) feeler gauge. Ensure no continuity exists between both terminals. Adjust throttle switch as necessary. Hold throttle switch and tighten retaining screws. Recheck throttle switch adjustment. Reconnect electrical connection.

Fig 1: Identifying Throttle Switch Terminals (Prizm)

Courtesy of GENERAL MOTORS CORP.

THROTTLE SWITCH CONTINUITY

Condition ⁽¹⁾

Continuity Reading

Between Terminals E2-IDL ⁽²⁾

Continuity

Between Terminals E2-IDL ⁽³⁾

No Continuity

⁽¹⁾	Rotate throttle switch to obtain correct continuity.

⁽²⁾	With .028" (.71 mm) feeler gauge installed between stop screw and lever.

⁽³⁾	With .032" (.81 mm) feeler gauge installed between stop screw and lever.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Throttle Switch