DME 7.8 DME 7.8 0 · 0-160.1P1354 - 911 Carrera

DME 7.8 DME 7.8 0 0-160.1P1354 - 911 Carrera Valve lift control, cylinder 4 - below limit Diagnosis conditions • Acceleration with wide-open throttle Possible fault cause ♦A valve stays at small lift ♦Several valves (various cylinders) do not switch to large lift Affected terminals - Diagnosis/troubleshooting Perform system test for large lift Warning! Test is carried out while driving. Have a second person oper- ate the Porsche System Tester 2. 1 - Select system test. 2 - Select "Request large lift". If "Valve lift diagnosis not ready" appears, a fault may have been stored. In this case, delete the fault memory. The engine must be at operating temperature. 1. Carry out acceleration with wide-open throttle in 2nd gear up to 7,000 rpm. Test in manual range for Tiptronic vehi- cles After 3,000 ignitions the Tester indicates whether a fault is present or not. In order to ensure that the fault is repaired, the flat-base tappets of the inlet valves of the entire cylinder bank should be replaced if a fault occurs. 1555 P1354 - 911 Carrera 0-160.1 page 1 Printed in Germany – 8, 2002 p1354a