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Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 88 (Smart Key System (Keyless Start) (2GR-FE) (Diagnostic Codes & Symptom Tests)) >> Smart Key System >> DTC B2278: Engine Switch Circuit Malfunction >> Description

DTC B2278: Engine Switch Circuit Malfunction: Description

WARNING: This page is about a different variant/trim than selected.

This DTC is output when 1) a malfunction is detected between the main body ECU (instrument panel junction block) and the engine switch; or 2) either of the switches inside the engine switch is malfunctioning.

HINT: 

When the main body ECU (instrument panel junction block) is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU (instrument panel junction block) is replaced, perform the registration procedures for the engine immobiliser system, refer to REGISTRATION .

DTC No. DTC Detection Condition Trouble Area
B2278 Communication is abnormal between the main body ECU (instrument panel junction block) and engine switch or the engine switch is defective
  • Engine switch
  • Main body ECU (instrument panel junction block)
  • Wire harness or connector