LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 1982 >> Corolla Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Throttle Positioner System >> Testing >> Throttle Positioner >> Starlet
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Throttle Positioner: Starlet

  1. With engine coolant temperature below 104°F (40°C), start engine and check that throttle positioner is activated.
  2. Warm engine to normal operating temperature. If necessary, check and adjust idle speed. Allow engine to idle and note that throttle positioner diaphragm releases throttle blade.
  3. Disconnect and plug vacuum hose from throttle positioner diaphragm. Throttle positioner should now be set. Disconnect and plug vacuum hose from EGR valve.
  4. With throttle positioner activated, engine speed should be 2000 RPM. If not, correct by turning throttle positioner adjusting screw making sure cooling fan is off. Reconnect vacuum hose and see that engine returns to idle within 1-6 seconds.
scientia non olet · About LEMON Manuals