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Home >> Lexus >> 2011 >> LS 600hL >> Repair and Diagnosis (Single Page) >> Electrical >> Starter >> Smart Access System With Push-Button Start (Keyless Start) (Diagnostic Codes & Symptom Tests) >> Smart Access System With Push-Button Start >> DTC B2278: Power Switch Circuit Malfunction >> Description

DTC B2278: Power Switch Circuit Malfunction: Description

This DTC is output when: 1) a malfunction is detected between the main body ECU and the power switch; or 2) either of the switches inside the power switch is malfunctioning.

DTC Code Detection Condition Trouble Area
B2278 Communication is abnormal between main body ECU and power switch or power switch is defective
  • Main body ECU
  • Power switch
  • Harness or connector
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