Mike's Workshop Manuals: Service manuals for every vehicle
Home >> GMC >> 1996 >> Forward Control 7.4 J >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - Gasoline >> Computerized Engine Controls >> Input Devices >> Cranking Signal

Cranking Signal

Cranking signal is a 12-volt signal monitored by the PCM. Signal is present when ignition switch is in the START position. The PCM/VCM uses signal to determine the need for starting enrichment. PCM/VCM also cancels diagnostics until engine is running and 12-volt signal is no longer present.

scientia non olet · About Mike's Workshop Manuals