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Home >> Geo >> 1993 >> Metro Base, 2D Hatchback, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> TCM Gear Signal (A/T)
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TCM Gear Signal (A/T)

On A/T applications, the ECM monitors voltage signal sent from the TCM when transaxle is in any gear except Park or Neutral. The ECM uses this input signal to help control fuel injector and Idle Air Control (IAC) valve.