DTC    B2272    Ignition 1 Monitor Malfunction

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DESCRIPTION

This DTC is output when a malfunction is occurring in the IG output circuit, which is from the IG1 relay actuation circuit inside the power source control ECU to the IG1 relay.

DTC No.
DTC Detection Condition
Trouble Area
B2272
IG1 relay actuation circuit inside power source control ECU or other related circuit is malfunctioning
  1. Power source control ECU
  2. Wire harness

WIRING DIAGRAM


A106717E02


INSPECTION PROCEDURE

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


    A109233E06

  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-6 - L73-34 (IG1D)
    		Below 1 Ω
    DA-5 or DD-7 - Body ground
    		Below 1 Ω
    DD-6 or L73-34 (IG1D) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


2.CHECK COWL SIDE JUNCTION BLOCK RH (RH-IG1 RELAY)


    A109234E05

  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-14
    		When battery voltage is not applied to terminals DD-6 and DA-5 or DD-7
    		10 kΩ or higher
    DM-1 - DD-14
    		When battery voltage is applied to terminals DD-6 and DA-5 or DD-7
    		Below 1 Ω



NG
REPLACE COWL SIDE JUNCTION BLOCK RH
OK

REPLACE POWER SOURCE CONTROL ECU