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Home >> Saturn >> 1994 >> SW1 Automatic >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Ignition System >> Programmable Read-Only Memory (Prom) >> Removal
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Programmable Read-Only Memory (Prom): Removal

  1. Disconnect negative battery cable. Remove ECM/PCM from vehicle. See ENGINE CONTROL MODULE (ECM)/POWERTRAIN CONTROL MODULE (PCM) . Position ECM/PCM so access cover faces upward. Remove access cover from ECM/PCM.
  2. Using thumb and forefinger, squeeze both ends of PROM inward (outward on some models) and pull PROM up from access hole.
NOTE: Note reference notch locations in PROM and ECM/PCM for reassembly reference.
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