DME 7.8 DME 7.8 0 · 0-PEININTRODUCTION

DME 7.8 DME 7.8 0 0DME 7.8 0-PEININTRODUCTION General The target group of this manual is trained automotive work- shop personnel who have successfully taken part in Porsche technical training on the systems concerned and possess the necessary theoretical and practical knowledge to be able to carry out work on complex systems. The basic requirement of all DME work is awareness and observance of safety instructions and warnings; these can be found in the "Notes" on the following pages. Note! The following troubleshooting diagnosis is aimed exclusively at left- hand drive vehicles and describes only these vehicle types. In some cases, specified plugs and sockets may be assigned differently in right-hand drive vehicles, which can lead to incorrect interpretations during troubleshooting and to unforeseen accidents. Therefore, no work should be performed on right-hand drive vehicles without the correct wiring diagram and troubleshooting diagnosis description. This OBDII Manual DME 7.8 applies to the following vehicles: ♦911 (996) with turbo engine as of model year 2001 ♦911 (996FL) with aspirated engine as of model year 2002 ♦Boxster (9^86FL) with aspirated engine as of model year 2003 The manual describes the diagnosis and troubleshooting for the engine control module installed in Porsche sports cars (OBD = On- Board Diagnosis). Described are the naturally aspirated engine and Turbo OBD II versions (USA), which cover the full scope of diagno- sis. This includes the EOBD (European OBD) and RoW (Rest of World) versions, which have been adapted to the respective laws and regulations from the point of view of diagnostics. The main differences of versions OBD II and EOBD are the tank leak test legally required in den USA and the criteria for fault memory entry and activation of the CHECK ENGINE lamp (hereafter abbrevi- ated CE), which is also designated as MIL (Malfunction Indication Light). The following functions are guaranteed by the OBD II system: ♦Detection of misfires 2470 INTRODUCTION 0-PEIN page 1 Printed in Germany – 14, 2003 PEIN2DME78