smartcarofamerica.com/threads/brake-malfunction.143338/

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Forum thread: Brake malfunction? | Smart Car of America Forum

smartcarofamerica.com/threads/brake-malfunction.143338/ · p. 1 · Applies to: 451

Source: smartcarofamerica.com Topic: brake malfunction / ABS system failure Models discussed: 451 Solution status: unclear

Problem: 2014 Smart ED Passion experiencing brake malfunction error with stiff brake pedal and alarm; hydraulic brakes still functional but require excessive force. Error codes and potential ABS system failure.

Solution: unresolved

Key facts: - Vehicle is 2014 Smart ED Passion (451 model) with 13.5K miles - Brake pedal is very stiff but still provides stopping power; error message displayed with alarm - Master cylinder and ABS motor assembly located under driver footwell beneath belly pans - Generic code readers may not read ABS codes; STARR diagnostics typically needed at dealership - Suspected failures: water in ABS pump connector, failed ABS pump, or dead power booster - Vehicle still has warranty coverage (4-year warranty, close to expiration) - Power booster failure diagnosis proposed in post #11 based on symptom profile (hard pedal but still functional) - OP has brake work experience and planned to attempt basic diagnostics before dealer visit