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Home >> Geo >> 1993 >> Prizm Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> DIAGNOSTIC CODE CHARTS (EXCEPT LSi) >> Code 14, Ignition Signal Circuit, No Signal >> Notes
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Code 14, Ignition Signal Circuit, No Signal: Notes

Igniter receives 5 volts from ECM. Igniter processes voltage then returns voltage to ECM as a ignition fail-safe signal. ECM also receives a .7 volt ignition signal when starter is being cranked. If ignition fail-safe signal is not present 4 successive times during cranking, Code 14 will set. ECM uses these signals to pulse injectors.

NOTE: Test numbers refer to test numbers on diagnostic chart.
  1. Checks for 5-volt signal from ECM.
  2. Verifies .10-2 volt signal from ECM.
  3. Checks for power to distributor.
  4. Checks for open in Black/Orange wire between junction block 1 and distributor or a faulty junction block 1.
  5. Checks for open in power feed to igniter, or a faulty ignition coil or igniter.
  6. Checks for open in Red/Black or Black/Orange wires to ignition switch and a faulty ignition switch.