198001705 - D071 CRUISE CONTROL RECALL CONTROL NOT WORKING

After having deactivated the Cruise Control system by pressing the brake/clutch pedal, when the Cruise Control RESUME button is pressed the speed set previously is not restored
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Connect the diagnostic equipment to the engine management control unit.Check that the lever RECALL position is recognized.Check that the Cruise Control contacts are working properly in the RECALL position, carrying out    See Test 5580AC CRUISE CONTROL RECALL CONTROL CHECKMove on to Step 2No continuity for lever contactsReplace the steering wheel interface lever with built-in Cruise Control    Op. 5580A10 CRUISE CONTROL LEVER ASSEMBLY - R+R
2All OKProblems encounteredOperation
Check the electrical continuity of the wiring between the cruise control system control and the engine control unit    See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT Move on to Step 3Connections not correctRestore the correct connections    See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
3All OKProblems encounteredOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persists: engine management control unit defectiveReplace the engine management control unit    Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R