EGR System Control Test

1. Make a thorough visual check of E.G.R. control system. If necessary, wipe away oil to facilitate inspection. If any hoses are cracked or broken, replace.
2. With engine stopped, inspect E.G.R. control valve for any indication of binding or sticking by moving diaphragm of control valve upwards with a finger.








3. With engine running, inspect E.G.R. control system operation referring to the table above.
When checking E.G.R. control valve operation, place a finger on the diaphragm of the valve.