939003583 - D074 CRUISE CONTROL SYSTEM DOES NOT GO OFF WHEN BRAKE PEDAL PRESSED

1BRAKE PEDAL SWITCH CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the brake pedal switch is working properlyMove on to Step 21. Brake pedal switch connection faulty1. Repair the engine connections:    See E5060 CRUISE CONTROL
2. Brake pedal switch faulty2. Replace the brake pedal switch    Op. 5550D10 BRAKE LIGHT SWITCH - R+R
2ENGINE MANAGEMENT CONTROL UNIT CONNECTIONS CHECKALL OKPROBLEMS ENCOUNTEREDACTION
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 E5060 CRUISE CONTROLMove on to Step 3No voltage detectedRepair the engine connections    See E5060 CRUISE CONTROL
3CHECK ON CORRECT OPERATIONALL OKPROBLEMS ENCOUNTEREDACTION
Check that the fault is no longer present by carrying out    See Test 5580AE CRUISE CONTROL OPERATION ROAD TESTEnd of diagnosisThe fault persists: control unit defectiveReplace the engine management control unit    Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R