DME 7.8 DME 7.8 0 · 4 - Perform acceleration with wide-open throttle in

DME 7.8 DME 7.8 0 4 - Perform acceleration with wide-open throttle in 2nd gear, until "Valve lift diagnosis completed" (max. 4000 rpm) appears. At speeds above 4000 rpm, misfires may be stored. Delete the fault memory and repeat the test. Note! ♦If a fault is detected, it is only recorded in the fault memory after 6,000 ignitions (at idling speed approx. 3 minutes waiting time). ♦It is important to observe the oxygen sensors during accelera- tion with wide-open throttle or to record their behaviour with the data logger. Diagnosis/Troubleshooting Note! ♦Do not use contact spray on the connectors to oxygen sensor. ♦If other faults (fuel supply) are stored in the memory, rectify these first. Work instruction Display OK If not OK 1 Check exhaust system for Repair exhaust sys- leaks tem → End 2 Replace oxygen sensor Note! Do not exchange oxygen sensors ahead of catalytic converter and after catalytic converter. 2469 P1145 0-122.7 page 3 Printed in Germany – 6, 2002 p1145