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Home >> Geo >> 1995 >> Prizm LSi, 1.8 8, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 1.8L >> DTC Charts >> DTC 14, No Ignition Signal >> Notes

DTC 14, No Ignition Signal: Notes

Igniter receives 5 volts from PCM. Igniter processes voltage then returns voltage to PCM as an ignition fail-safe signal. PCM also receives a 0.7 volt ignition signal when starter is being cranked. PCM uses these signals, along with others, to determine when to pulse injectors. DTC 14 will set if ignition fail-safe signal is not received at PCM for 4 successive ignition signals.

NOTE: Test numbers refer to test numbers on diagnostic chart.
  1. Checks for 5-volt signal from PCM.
  2. Verifies 0.10-2.0 volt signal from PCM.
  3. Checks for power to igniter.
  4. Checks to see if voltage is supplied to distributor.
  5. Checks for an open in primary coil output control to igniter, for a faulty ignition coil and a faulty coil.
  6. Checks for an open in Black/Orange wire between junction block 1 and distributor or for a faulty junction block 1.
  7. Checks for an open in Red/Black wire or Black/Orange wire to ignition switch and for a faulty ignition switch.