Vauxhall Workshop Service and Repair Manuals

B-08, F8: ECU CONTROL TEST
Test	Work Order Description		Nominal Value
T02	Tester Display   EGR CONTROL
	•  Engine running at idle speed, operating temperature   •  Selector lever in position P-N   •  Vehicle stationary   •  All consumers turned off   •  Press corresponding key in the system main menu to call up ECU Control tests, select the desired test and confirm with YES. Follow the instructions in the diagnostic tester display.   •  Press F9 key to activate the snapshot mode.   •  After the test is started, the corresponding actuator can be actuated using the CURSOR keys.   •  Press keys YES and NO to view the corresponding datalist parameters.		Test okay?
	Note:   The behaviour of the engine at various different exhaust gas recirculation rates may tell you if the exhaust gas recirculation valve is working properly. Depending on the opening of the exhaust gas recirculation valve a certain amount of exhaust gas flows back into the intake system, enters the cylinders with the next opening of the intake valve, and is included in the next combustion cycle. If a high amount of exhaust gas is recirculated, the engine will not have enough oxygen for proper combustion (the oxygen sensor recognises lean combustion, injection time is increased). The engine will start to jerk. Recirculation rates of more than 30 % will cause clearly noticeable engine jerk which will increase in proportion to the amount of recirculated exhaust gas. The engine will stall if the recirculation rate is greater than 60 %.
	Concerned Terminals:   D1
	Yes: T03	No: C-22