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Home >> Geo >> 1990 >> Prizm Base, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Tests W/Codes >> Diagnostic Circuit Check >> Code 14, Ignition Signal Circuit No Signal (VIN 6) >> Notes
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Code 14, Ignition Signal Circuit No Signal (VIN 6): Notes

The ECM receives a 12-volt signal from the ignitor on ECM terminal IGF. If this signal is not present 4 times during cranking, Code 14 will set. The ECM uses this signal to pulse the fuel injector.

NOTE: Test numbers refer to test numbers on diagnostic chart.
  1. This verifies B+ signal from the ECM.
  2. This checks for a short to ground in the Black wire.