C 2500 Suburban 2WD V8-350 5.7L VIN K TBI (1995)
Crank Signal Circuit
CIRCUIT DESCRIPTION
Crank signal is an ignition voltage signal to the ECM during cranking to allow enrichment and cancel diagnostics until engine is operating with 12
volts no longer on the circuit.
CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Checks for normal (cranking) voltage to terminal "C9" of ECM. Test light should be "ON" during cranking and then go "OFF" when engine is
operating.
2. Checks to determine if source of open fuse or fuse link was a faulty ECM.
