Test Control unit, after-running watchdog fault Flash code: 3x long, 9x short Fault indication: Fault indicated by steady light at EDC indicator lamp Fault path: Control unit defective (watchdog test) Effect of fault: Reduced full load delivery volume Reduced final engine speed n = 2000–2100 rpm 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) 63 Test Measurement Corrective measures Control unit No further test necessary – Replace control unit