DTC B2274: ACC Monitor Malfunction [09/2014 - ]: Description

This DTC is stored when a malfunction in the ACC output circuit is detected. The ACC output circuit is the circuit that goes from the ACC output terminal of the power management control ECU to the ACC relay.

HINT:

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC Code	DTC Detection Condition	Trouble Area	DTC Output Confirmation Operation
B2274	Malfunction in the ACC relay circuit in the power management control ECU or in the external circuit (1-trip detection logic*). HINT: When the voltage at terminal ACCD is not at the standard, the system is determined to be malfunctioning.	AM2 fuse RH ACC relay (cowl side junction block RH) Power management control ECU Wire harness or connector	Wait 10 seconds after turning the power switch on (ACC) or on (IG), and then wait another 10 seconds after turning the power switch off.

*: Only detected while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Vehicle Condition when Malfunction Detected	Fail-safe Function when Malfunction Detected
If there is a malfunction due to the relay being stuck on, the ACC relay does not turn off even though the power switch is off. If there is a malfunction due to the relay being stuck off, the ACC relay does not turn on even though the power switch is on (ACC). HINT: The power switch can be turned on (IG) and the hybrid control system can be started.	-

RELATED DATA LIST AND ACTIVE TEST ITEMS

DTC	Data List Item	Active Test Item
B2274	Power Source Control ACC Relay Monitor	-