Smart Fortwo 451 (MHD): Ignition Stays On Without Key – Fixed!

Описание: In this video, we dive into an unusual electrical issue on a Smart Fortwo Coupe 451 1.0 MHD where the ignition stayed on even after removing the key from the ignition switch. This fault triggered a cascade of DTCs across multiple modules.

After a thorough investigation, we discovered that aftermarket dash cam wiring was back-feeding the ignition circuit, keeping it live. Once the wiring was corrected, all related symptoms were resolved.

We walk you through the diagnostics, fault codes, and the full fix. Perfect for technicians, Smart car owners, and automotive enthusiasts!

Fault codes recorded:
U0101, U0100, B1102, B1103, B1101, B1106, B1731, B1726, U1073, U1113, P0500, P0318, U0002, P20B1, P1600, U0122

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Hashtags:
#SmartFortwo #Smart451 #AutoRepair #IgnitionIssue #DTC #DiagnosticTroubleCodes #CarElectricalProblem
#U0101 #U0100 #B1102 #B1103 #B1101 #B1106 #B1731 #B1726 #U1073 #U1113 #P0500 #P0318 #U0002 #P20B1 #P1600 #U0122
Disclaimer:
this video only contains tips and recommendations that could be useful when carrying out vehicle repairs or replacement parts, STANHOPE AUTO REPAIR CENTRE WARDAK is not liable for any damage, harm injury or property damage incurred while carrying out repairs or replacement that are a result of incorrect use or misinterpretation of the provided information purposes only and does not guarantee achievement of specific result. The user is personally liable for incorrect use of repair equipment, tools or vehicle parts, in particular, when this use poses the risk of injury. STANHOPE AUTO REPAIR CENTRE WARDAK strongly recommends being careful and adhering to the safety rules when doing any repair or replacement.