3360377 - Z77 WARNING LIGHTS CONTROL LINE ERROR

The diagnostic equipment signals the following error: C1507 Warning lights serial line
This error is signalled if the control unit does not manage to communicate with the instrument panel
Results of the tests
1INITIAL PANEL CHECKAll OKProblems metOperation
Turn the ignition ON and check whether the instrument panel carries out the initial check on the warning lightsContinue to Step 3Initial check not carried out Continue to Step 2
2PANEL POWER SUPPLY CHECKAll OKProblems metOperation
Check that the instrument panel is correctly connected to the network See   E4010  INSTRUMENT PANEL Continue to Step 3Panel power supply missing Restore the correct connections, if necessary, replace the instrument panel Op.   5560B10 
3ELECTRICAL CONNECTIONS CHECKAll OKProblems metOperation
Check that the connection between the instrument panel and the brake control unit is correct See   E7020  ABS Continue to Step 4Problems with the electrical connections Restore the correct connection
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Delete the errors using the diagnostic equipment.Turn the ignition OFF and then ON to make the control unit check whether there are errors present Check that the fault is no longer presentEnd of diagnosis.