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Home >> Mitsubishi >> 1993 >> Eclipse Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Inhibitor Switch (A/T Models)
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Inhibitor Switch (A/T Models)

  1. Switch is mounted to automatic transaxle, near shift lever mechanism. Ensure switch is adjusted properly. Switch output can be affected by improper adjustment. Using DVOM, measure resistance between selected terminals to ensure continuity between ignition switch and ECM when shift selector lever is in Park or Neutral position. See INHIBITOR SWITCH CONTINUITY CHECK  table.
  2. Using DVOM, measure power supply voltage of switch. Disconnect ECM connector. Disconnect inhibitor switch connector. Turn ignition switch to START position. Measure voltage between inhibitor switch and vehicle ground. On Galant, inhibitor switch wire color is Black/White; on Eclipse, inhibitor switch wire color is Black/Yellow. Supply voltage should be battery voltage. If voltage is within specification, go to step 3. If voltage is less than battery voltage, check and repair power supply circuit.
  3. Using DVOM, measure inhibitor switch terminal input voltage. Connect ECM connector. Ensure inhibitor switch connector is disconnected. Turn ignition switch to ON position. Measure voltage between inhibitor switch and vehicle ground. Input voltage should be battery voltage. If voltage is within specification, go to step 4. If voltage is less than battery voltage, check and repair circuit.
  4. Using DVOM, measure input voltage of ECM. Disconnect ECM connector. Connect inhibitor switch connector. Ensure shift selector lever is in "P" position. Turn ignition switch to ON position. Measure voltage between ECM connector and vehicle ground. See ECM TERMINAL ID  table. ECM input voltage should be 8 volts or greater. If voltage is within specification, system is okay. If voltage is less than 8 volts, replace ECM.
    INHIBITOR SWITCH CONTINUITY CHECK

    Application (1) Wire Color (2) Wire Color
    Eclipse Black/Yellow Black/Yellow
    Galant Black/White Black/Yellow
    (1) Ignition switch to inhibitor switch circuit.
    (2) Inhibitor switch to ECM circuit.
    ECM TERMINAL ID

    Application (1) Terminal Number
    Eclipse 104
    Galant 71
    (1) See Figure and Figure .
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