Toyota 2GR-FE Manual page 919

DTC B2278
DESCRIPTION
This DTC is output when 1) a malfunction is detected between the main body ECU and the engine switch;
or 2) either of the switches inside the engine switch is malfunctioning.
HINT:
When the main body ECU 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 is replaced, perform the registration procedures for the engine immobiliser
system (See page EI-8).
DTC No.
Communication is abnormal between the main body
B2278 ECU and engine switch or the engine switch is
defective
2GR-FE STARTING – SMART KEY SYSTEM
Engine Switch Circuit Malfunction
DTC Detection Condition Trouble Area
• Engine switch
• Main body ECU
• Wire harness or connector
ST–57
ST