Test Control unit (processor afterrunning) Flash code: 3x long, 8x short Fault indication: Fault indicated by steady light at EDC indicator lamp Fault path: Control unit Processor afterrunning did not take place Effect of fault: Reduced full load delivery volume Reduced final engine speed n = 2000–2100 rpm Function: Every time the engine is turned off, afterrunning takes place auto- matically for the purpose of checking the various processor func- tions Possible cause Control unit defective, main relay defective, battery voltage switched off before “ignition” off Test precondition:
EDC control unit disconnected Socket box connected Other possible causes Engine was shut down via battery + (e.g. by disconnecting the battery or removing the fuse) Power supply fault (e.g. undervoltage, main relay K1 defective, loose contact) 62 Test Measurement Corrective measures Control unit Test same as for undervoltage (page 48) and main relay (page 54) – Switch “ignition” on and off again, delete fault code – Same as pages 48 and 54 – Replace control unit