2398802 - K01 REV COUNTER NOT WORKING

With the engine started, the rev counter does not work, or it works irregularly.
Results of the tests
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the Examiner to the diagnostic socketCheck that there are no faults in the instrument panel Continue to Step 2There are errorsProceed in accordance with the instructions given by the diagnostic equipment
2CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Keeping the Examiner connected to the diagnostic socket, check the operation of the pointer in active diagnosisContinue to Step 3Rev counter is not workingReplace instrument panel Op. 5560B11
3ELECTRICAL CIRCUIT CHECKAll OKProblems metOperation
1.2 16v 1.4 16vCheck connections between instrument panel, Body Computer and engine management control unit See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT Continue to Step 4Faulty wiringRestore/replace the wiring: See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT
1.3 JTD 16vCheck connections between instrument panel, Body Computer and engine management control unit See   E5050  DIESEL ENGINES ELECTRONIC MANAGEMENT Continue to Step 4Faulty wiringRepair/replace the wiring See   E5050  DIESEL ENGINES ELECTRONIC MANAGEMENT
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer present End of diagnosis