| General notes on the injection system |
| The engine control unit is equipped with a self-diagnosis system. Before repairs and also for fault finding, first of all interrogate the fault memory. Also check the vacuum hoses and connections (unmetered air). |
| A minimum voltage of 11.5 V is required for perfect functioning of the electrical components. |
| If after fault finding, repair or inspection of components the engine starts briefly and then stops, it is possible that the immobiliser blocks the 4AV control unit. In this case the fault memory must be interrogated and if necessary the control unit must be adapted. |
| Certain inspections may cause the control unit to detect and store a fault. It is therefore necessary to interrogate the fault memory after having completed all inspections and repairs, and if necessary erase → Chapter 01-1. |
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