| Properties of the self-diagnosis |
Note | The self-diagnosis monitors only a part of the injection and ignition system. The “Current Flow Diagrams, Electrical Fault Finding and Fitting Locations” binder should always be used for fault finding. |
| The MOTRONIC engine control unit -J220- is equipped with a fault memory. |
| If malfunctions occur in the monitored sensors or components, they are stored in the fault memory with indication of the fault type. |
| After it has analysed the information the engine control unit has different fault codes → Chapter → Chapter to choose from, which are then stored until the fault memory contents are erased. |
| Faults that only occur temporarily (sporadically) are output with the suffix “sporadically occurred fault”. On the display these faults are indicated by the suffix “SP”. Possible causes of sporadic faults are e.g. a loose contact or a momentary line interruption. If a sporadic fault no longer occurs within 40 warming-up phases (engine started at a temperature of 50°C and switched off at more than 72 °C), the fault is then automatically erased fom the fault memory. |
| After the fault or faults have been rectified, it is necessary to erase the fault memory → Chapter and also to → Chapter re-generate the readiness code. |
Note | t
| The following description only relates to vehicle system tester -V.A.G 1552- using the program card - 5.0-, or higher. |
| t
| If fault read-out scan tool -V.A.G 1551 - with program card -8.0- or higher and integrated printer, or if vehicle system tester -V.A.S 5051- is used, slight variations in the readouts in the display are possible. |
|
|
|
