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 complete" (max. 4,000 rpm) appears. At speeds above 4,000 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 sensor during acceleration with wide-open throttle or to record its behaviour with the data logger. 631 Valve lift control, cylinder 3 - signal implausible Diagnosis conditions • Speed between 2,000 and 3,320 rpm and between 5,280 and 6,520 rpm • Load between 45 and 70 % and between 125 and 190 % • Acceleration with wide-open throttle Possible fault cause ♦A valve does not switch to large lift ♦Several valves (various cylinders) do not switch to large lift and ♦A valve does not switch to small lift ♦Several valves (various cylinders) do not switch to small lift Affected terminals - Diagnosis/troubleshooting Perform system test for large lift Warning! 1555 P1355 0-161 page 5 Printed in Germany, 2000 p1355