3022590 - D71 CRUISE CONTROL RECALL CONTROL NOT WORKING

After deactivating the Cruise Control system by pressing the brake/clutch pedal, using the 'RESUME' button on the Cruise Control, the speed set previously is not restored.
Results of the tests
1CHECK ON RESUME COMMANDAll OKProblems metOperation
Check that the Cruise Control contacts work properly in the RESUME positionContinue to Step 2Lack of continuityReplace stalk unit lever with built-in Cruise Control system control Op.   5580A10 
2CHECK CONNECTIONS TO ENGINE MANAGEMENT CONTROL UNITAll OKProblems metOperation
With the ignition and Cruise Control knob set to 'ON' and 'RESUME', check that there is a voltage signal from the Cruise Control system control to the engine management control unit: See   E5060  CRUISE CONTROL Continue to Step 3No voltage foundRestore the connections: See   E5060  CRUISE CONTROL
3CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentThe fault persists: control unit faultyReplace the engine management control unit Op.   1056B82  Search for the fault starting from another symptom'