Test Request button (brake) “Br” button on EDC operating element Flash code: 1x long, 4x short Fault indication: Fault is not indicated by EDC indicator lamp Fault path: Request button Effect of fault: Idle speed adjustment cannot be activated Possible cause Line break, request button defective Test precondition: EDC control unit connected Socket box connected “Ignition” switched on 49 Test Measurement Corrective measures Request button (brake) Measure voltage at socket box across pin 43 (+) and pin 19 (–) Button depressed: U-Batt Button not depressed: 0 – Check lines – Check plug connections – Replace button