184000438 - H30 ELECTRIC STEERING NOT WORKING / CITY

When the CITY button is pressed, the function is not activated and greater power assistance for the electric steering is not obtained
Results of the tests
1FUNCTIONAL CHECKAll OKProblems metOperation

When pressing the CITY button, check that:

  • The LED in the actual button comes on.
  • The corresponding symbol in the NQS lights up.
Continue to Step 2Signal in button and symbol off constantly.Continue to Step 5
The LED in the button is constantly off whilst the symbol lights upContinue to Step 3
The LED in the button lights up, but the symbol does not.Continue to Step 8
2CHECK ON CITY FUNCTIONAll OKProblems metOperation
Carry out a road test to check that a difference in power assistance takes place when the CITY button on the control panel is pressed See Test 4110A Electric steering operation check End of diagnosisLED and symbol are working whilst the servo assistance does not alterContinue as instructed See table H25 NO ELECTRIC STEERING POWER ASSISTANCE WITH FAILURE WARNING LIGHT NOT ON
3OPERATION CHECKAll OKProblems metOperation
Check that the CITY button and signal are working properly See E7045 ELECTRIC STEERING Continue to Step 4Component not working.Restore correct operation
4CHECK ON CONNECTIONSAll OKProblems metOperation
Check the continuity of the wiring between the CITY button and the Body Computer Node See E7045 ELECTRIC STEERING End of diagnosisElectrical connections not working.Restore damaged electrical connection.
5CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Using the Examiner, check, in the Body Computer Node ambient, that there are no errors and that the specific parameter varies.Continue to Step 7Impossible to connect with the Body Computer control unit.Continue to Step 6
Errors present.Continue according to the instructions for the diagnostic equipment
The parameter values do not changeContinue to Step 3
6ELECTRIC POWER SUPPLY CHECKAll OKProblems metOperation
Check that the Body Computer Node electrical power supply is correct.Continue to Step 7Positive and/or earth electrical power supply fault.Replace the defective component (if a fuse is involved, search for the cause of the problem).
7CHECK ON CONNECTIONSAll OKProblems metOperation
Check that the CITY button and wiring with the Body Computer Node are working properly See E7045 ELECTRIC STEERING Continue to Step 8Button faultyReplace faulty component
Electrical wiring not workingRenew the damaged wiring.
8CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Using the Examiner, check the possibility of connecting with the Body Computer Node.End of diagnosisImpossible to connect with the Body Computer control unit.Replace the Body Computer Node Op. 5505A32
9CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Using the Examiner check, in the Instrument Panel Node ambient, that there are no errors and the following parameters are present.Continue to Step 13Impossible to connect with the Instrument Panel control unitContinue to Step 10
Errors present.Continue according to the instructions for the diagnostic equipment
10ELECTRIC POWER SUPPLY CHECKAll OKProblems metOperation
Check that the Instrument Panel Node electrical power supply is correct.Continue to Step 11Positive and/or earth electrical power supply fault.Replace the defective component (if a fuse is involved, search for the cause of the problem).
11CHECK ELECTRICAL CONNECTIONSAll OKProblems metOperation
Check the electrical connections between the Body Computer and the Instrument Panel, in particular that each individual pin is correctly connected.Continue to Step 12Electrical connections not working.Restore damaged electrical connection.
12CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Using the Examiner, check whether it is possible to connect with the Instrument Panel Node.Continue to Step 4Impossible to connect with the Instrument Panel control unit.Replace the Instrument Panel Node control unit Op. 5560B11
13CHECK WITH ACTIVE DIAGNOSISAll OKProblems metOperation
With the Examiner in the Instrument Panel Node ambient, check, in active diagnosis, that the steering failure warning light is correctly activatedContinue to Step 14The component in question is not activated.Replace the Instrument Panel Node control unit Op. 5560B11
14CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persists.Continue to Step 1