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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Theft Deterrent / Keyless Entry) >> Engine Immobilizer System >> DTC B278A: Short to GND in Immobilizer System Power Source Circuit >> Description

DTC B278A: Short to GND in Immobilizer System Power Source Circuit: Description

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

This DTC is output when the engine switch power source supply line is open or shorted.

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
B278A Engine switch power source supply line is open or shorted
  • Wire harness or connector
  • Engine switch
  • Certification ECU (Smart key ECU assembly)
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