DTC B2274: ACC Monitor Malfunction [08/2015 - 08/2019]: Description

This DTC is stored when there is a problem in the ACC output circuit, which is from the ACC output terminal of the power management control ECU to the ACC relay.

HINT:

When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode is reset to on (IG). When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC Code	DTC Detection Condition	Trouble Area
B2274	The ACC relay actuation circuit inside the power management control ECU or other related circuit is malfunctioning.	AM2 fuse Main body ECU (Driver side junction block assembly) (ACC relay) Power management control ECU Harness or connector