ECD SYSTEM > EGR Control Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

CHECK CONNECTION OF VACUUM HOSE

CHECK VACUUM

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (EGR CUT VACUUM SWITCHING VALVE)

INSPECT EGR CUT VACUUM SWITCHING VALVE

CHECK WIRE HARNESS (EGR CUT VACUUM SWITCHING VALVE - ECM)

CHECK WIRE HARNESS (EGR CUT VACUUM SWITCHING VALVE - MAIN RELAY)

CHECK ECM (EGR VOLTAGE)

CHECK OPERATION OF EGR ELECTRIC VACUUM REGULATING VALVE

INSPECT EGR ELECTRIC VACUUM REGULATING VALVE (RESISTANCE)

CHECK WIRE HARNESS (EGR ELECTRIC VACUUM REGULATING VALVE - ECM)

CHECK WIRE HARNESS (EGR ELECTRIC VACUUM REGULATING VALVE - MAIN RELAY)

INSPECT EGR VALVE ASSEMBLY

When not using intelligent tester:

CHECK CONNECTION OF VACUUM HOSE

CHECK VACUUM

INSPECT EGR CUT VACUUM SWITCHING VALVE

INSPECT EGR CUT VACUUM SWITCHING VALVE (OPERATION)

CHECK WIRE HARNESS (EGR CUT VACUUM SWITCHING VALVE - ECM)

CHECK WIRE HARNESS (EGR CUT VACUUM SWITCHING VALVE - MAIN RELAY)

CHECK ECM (EGR VOLTAGE)

INSPECT EGR ELECTRIC VACUUM REGULATING VALVE (RESISTANCE)

INSPECT EGR ELECTRIC VACUUM REGULATING VALVE (OPERATION)

CHECK WIRE HARNESS (EGR ELECTRIC VACUUM REGULATING VALVE - ECM)

CHECK WIRE HARNESS (EGR ELECTRIC VACUUM REGULATING VALVE - MAIN RELAY)

INSPECT EGR VALVE ASSEMBLY