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Home >> Infiniti >> 2007 >> M45 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Body, Lock & Security System >> Intelligent Key System/Engine Start Function >> DTC B2557: Vehicle Speed >> Self-Diagnostic Logic
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Self-Diagnostic Logic

SELF-DIAGNOSTIC LOGIC

DTC Self-diagnosis name DTC detecting condition Possible causes
B2557 VEHICLE SPEED When comparing the vehicle speed signal, that is input to the Intelligent Key unit with power supply position ON and when one signal displays 10 km/h or more, the condition that another signal displays less than 5 km/h continues for 10 seconds or more
  • Harness and connector (Open in the circuit between the units)
  • Unified meter and A/C amp.