Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 147 Factory Service Manual (2000-2004)22 · Fault diagnosis
22 · Diagnostics

Abs failure warning light on

Make
Alfa Romeo
Model
147 Factory Service Manual
Year
2000–2004
Section
Instrument panel › Abs failure warning light on
Fault diagnosisAbs failure warning light on

ABS FAILURE WARNING LIGHT ON

Warning light in instrument panel on

Results of the tests
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Connect the diagnostic equipment and check:

  • that there are no faults in the control unit
  • the plausibiilty of the parameters
Continue to Step 2Error detected in the control unitContinue following the instructions for the diagnostic equipment
Parameter not currentContinue following the instructions for the diagnostic equipment
2ROAD TEST WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Road test the vehicle at a speed of below 50 km/h, reproducing the conditions in which the fault arises, keeping the diagnostic equipment connected.

Verify:

  • that there are no faults in the control unit
  • the plausibiilty of the parameters
Continue to Step 3Error detected in the control unitContinue following the instructions for the diagnostic equipment
Incoherent parameterContinue following the instructions for the diagnostic equipment
3ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Carry out active diagnosis of:

  • solenoid valves
  • pump motor
Continue to Step 4Solenoid valves not workingReplace the ABS unit
Pump motor not workingReplace the ABS unit
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentFault persists, control unit defective

Replace control unit Op. 3340A12

Search for the fault starting from another symptom'

Parts & tools for this job For 2000 Alfa Romeo 147

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