DTC    B2274    ACC Monitor Malfunction

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DESCRIPTION

This DTC is output when a malfunction is occurring in the ACC output circuit, which is from the ACC relay actuation circuit inside the power source control ECU to the ACC relay.

DTC No.
DTC Detection Condition
Trouble Area
B2274
ACC relay actuation circuit inside power source control ECU or other related circuit is malfunctioning
  1. Power source control ECU
  2. Wire harness

WIRING DIAGRAM


A106710E02


INSPECTION PROCEDURE

1.CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK RH - ECU AND BODY GROUND)


    A109233E07

  1. Disconnect the DA and DD junction block connectors.

  1. Disconnect the L73 ECU connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    DD-2 - L73-11 (ACCD)
    		Below 1 Ω
    DA-5 - Body ground
    		Below 1 Ω
    DD-7 - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


2.CHECK COWL SIDE JUNCTION BLOCK RH (ACC RELAY)


    A109234E06

  1. Disconnect the DD and DM junction block connectors.

  1. Measure the resistance of the junction block connectors.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    DM-1 - DD-27 or DD-26
    		When battery voltage is not applied to terminals DD-2 and DD-7 or DA-5
    		10 kΩ or higher
    DM-1 - DD-27 or DD-26
    		When battery voltage is applied to terminals DM-1 and DD-7 or DA-5
    		Below 1 Ω



NG
REPLACE COWL SIDE JUNCTION BLOCK RH
OK

REPLACE POWER SOURCE CONTROL ECU