DTC    P0660    Intake Manifold Tuning Valve Control Circuit / Open (Bank 1)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST (VACUUM SWITCHING VALVE)

CHECK VACUUM HOSES (INTAKE MANIFOLD - VACUUM SWITCHING VALVE, VACUUM SWITCHING VALVE - INTAKE AIR CONTROL VALVE)

INSPECT INTAKE AIR CONTROL VALVE

INSPECT VACUUM SWITCHING VALVE (OPERATION)

CHECK WIRE HARNESS (VACUUM SWITCHING VALVE - ECM, VACUUM SWITCHING VALVE)

INSPECT INTEGRATION RELAY (EFI MAIN RELAY)