2427511 - I12 TURN SIGNALS RH OR LH SIDE NOT WORKING

The turn signals on one side, LH or RH, do not work;
The turn signals are controlled and diagnosed (light operation check) directly by the body computer node.
Results of the tests
1CHECK ON BULBSAll OKProblems metOperation
Check the condition of the bulbs and that the rating is correct.Continue to Step 2Bulbs damagedReplace bulbs
2CHECK ON STEERING COLUMN SWITCH UNITAll OKProblems metOperation
Check the steering column switch unit, in particular the direction indicators and lane change functionContinue to Step 3Control not workingReplace the steering column switch unit
3CHECK ON DIRECTION INDICATORS/HAZARD LIGHTS ELECTRICAL CIRCUITAll OKProblems metOperation

Check, in order:

Continue to Step 4Defective componentReplace the component involved (if a fuse is involved, search for the cause of the problem)
Connections brokenRestore the connections
Lamps earth defectiveRenew the bulb earth: See   E2020  DIRECTION INDICATORS / HAZARD WARNING LIGHTS
4CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Connect the diagnostic equipment to the tester input and check:

  • the operation of the direciton indicator bulbs through active diagnosis
Continue to Step 4Bulbs do not come on Replace the Body Computer
5CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer present End of diagnosis