K 1500 Truck 4WD V8-379 6.2L DSL VIN C FI (1992)
Cold Advance: Testing and Inspection
Cold Advance System
Cold Advance System Circuit
Circuit Description:
With the key "ON," and coolant temperature below 80°F, the ECM grounds CKT 905 to the cold advance relay. Grounding CKT 905 turns "ON"
the relay, to supply 12 volts to the cold advance solenoid, in the injection pump, and the glow plug controller The cold advance solenoid is now
energized, which causes the injection timing to be advanced approximately 4°.
