Test Control unit EEPROM computer, 1 fault Flash code: 3x long, 2x short Fault indication: Fault indicated by steady light at EDC indicator lamp Fault path: Processor 1 in control unit defective Possible cause Control unit defective, EOL programming not completed (voltage supply interrupted), e.g. during EDC tracking Effect of fault: Engine is shut down Engine will not start Caution: Do not change the control unit if the entries in the fault memory occurred in the following way: 1. Entry made when ignition is switched off. When the ignition is switched on again the fault which caused this entry to be made is cancelled again and therefore has no effect on operation. 2.
Entry after use of MAN-Cats (EOL programming). If this entry in the fault memory was generated through use of MAN-Cats, the engine can no longer be started. In this case do not change the control unit but repeat the previous work with MAN-Cats. Note: If one of these fault memory entries occurs together with the entry Main relay (flashcode: 2x long, 5x short) or Control unit computer tracking (flashcode 3x long, 8x short) the reason should be sought not in the control unit but in the power supply for the control unit. See also page 54 (main relay) and page 62 (control unit computer tracking).
59 Test Measurement Corrective measures Power supply No further test necessary – Complete EOL pro- gramming, delete fault code Control unit