198001708 - D074 CRUISE CONTROL SYSTEM DOES NOT GO OFF WHEN BRAKE PEDAL PRESSED

1BRAKE PEDAL SWITCH CHECKAll OKProblems encounteredOperation
Check that the brake pedal switch is working properly, carrying outMove on to Step 2Brake pedal switch connection faultyRestore the correct connections    See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
Brake pedal switch faultyReplace the brake pedal switch    Op. 1060G38 BRAKE PEDAL SWITCH - R.R
2ENGINE MANAGEMENT CONTROL UNIT CONNECTIONS CHECKAll OKProblems encounteredOperation
With the ignition key in the ON position and the brake pedal pressed, check for a voltage signal at the engine management control unit coming from the brake switch    See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT Move on to Step 3No voltage detectedRepair the engine connections: wiring diagram    See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
3All OKProblems encounteredOperation
Check that the fault is no longer present by carrying out    See Test 5580AE CRUISE CONTROL OPERATION ROAD TEST CHECKEnd of diagnosisThe fault persists: engine control unit defectiveReplace the engine management control unit    Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R