DTC    B2274    ACC Monitor Malfunction

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DESCRIPTION

This DTC is output when a malfunction occurs in the ACCD output circuit, which is between the D-ACC relay actuation circuit inside the main body ECU and the D-ACC relay.

DTC Code
Detection Condition
Trouble Area
B2274
D-ACC relay actuation circuit inside main body ECU or other related circuit is malfunctioning
  1. Main body ECU
  2. Wire harness or connector

WIRING DIAGRAM


A149373E02


INSPECTION PROCEDURE

1.READ VALUE OF INTELLIGENT TESTER (D-ACC RELAY MONITOR)

  1. Use the Data List to check if the D-ACC relay is functioning properly.

    Main body ECU 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    ACC Relay Monitor
    		D-ACC relay monitor/ON or OFF
    		ON: Engine switch on (IG)
    OFF: Engine switch off
    		-

OK:
When the engine switch is turned on (IG), ON is displayed on the tester.



NG
Перейдите к шагу 3
OK


2.CHECK ENGINE SWITCH (SWITCH CONDITION)

  1. Ensure the key is inside the cabin.

  1. Check that the power source mode changes as shown below each time the engine switch is pushed.

    OK:
    off → on (ACC) → on (IG) → off



NG
GO TO POWER SOURCE MODE DOES NOT CHANGE (Нажмите здесь)
OK

NORMAL 

3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BODY GROUND)

A150545E03

  1. Disconnect the L13, DF and DA main body ECU connectors.

  1. Measure the resistance and voltage according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L13-22 (ACCD) - DA-19
    		Always
    		Below 1 Ω
    L13-22 (ACCD) or DA-19 - Body ground
    		Always
    		10 kΩ or higher
    DA-40 - Body ground
    		Always
    		Below 1 Ω

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    DF-1 - Body ground
    		Always
    		11 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU