2470 ME 7.8 Motronic engine manage- 2470 New diagnosis facilities of ME 7.8 · ment system

911 Fuel and ignition system 2 2470 ME 7.8 Motronic engine manage- 2470 New diagnosis facilities of ME 7.8 ment system Motronic As of model year 2002, the 911 Carrera is ? Compared to ME 7.2, the ME 7.8 Mo- fitted with ME 7.8 Motronic. This Motronic tronic as of software version 12.0 of the is derived from the 911 Turbo (996) and Porsche System Tester 2, extended di- adapted to the engine-specific require- agnosis facilities can by used. ments (without boost pressure control). ? To protect the converter on vehicles with Tiptronic, the engine speed with vehicle stationary is restricted to ap- prox. 4000 rpm. Actual values: ? When directly entering the actual val- ues, only a reduced number of actual values are displayed. ? The full range of actual values can be read out via the "Filter" soft key and "All Actual Values". ? The filters can also be selected ac- cording to systems or functions, or in- dividual ones can be created via "New" 2_11_01 filter. The ME 7.8 provides the following new System checkfunctions and components ? Valve stroke control, shorter stroke:? Extended diagnosis facilities of the Mo- Unlike on the 911 Turbo (996), with tronic management system this vehicle the check must be carried? On-board diagnosis (wordwide) out in a workshop, in accordance with? Actuation of continuous closed-loop instructions of the Porsche System position control of intake camshafts Tester 2.? VarioCam Plus control (valve stroke) ? Valve stroke control, longer stroke:? Modified Hall sensor signal As on the 911 Turbo (996), this test is? Oxygen sensor, LSF carried out during a test drive in accor-? Modified hot film air mass flow sensor dance with instructions of the Porsche HFM-5 System Tester 2.? Injection valves EV-6 ? Non-return fuel supply system Actuator activated ? Valve stroke control, cylinder bank 1 and 2: In this test, the engine speed must be increased to a value which will be regis- tered on the tester, otherwise the e n- gine will stall. 2002 Service Information 2 - 5