K 3500 Truck 4WD V8-379 6.2L DSL VIN C FI (1992)
EPR Solenoid Diagnostic Chart
Test Description:
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Checks for short to ground or a faulty ECM signal to EPR solenoid. Test light should normally be "OFF."
2. Checks for signal to energize EPR solenoid with engine at idle. If the test light is "ON," electrical circuits to the solenoid are OK.
3. Checks for voltage or an open circuit from terminal "B" to the ECM, terminal "C 12".
