Dtc B2277 Detecting Vehicle Submersion

Engine. Lexus Is250, Is220D. Gse20 Ale20
4Gr-Fse Starting. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

INSPECTION PROCEDURE

CHECK FOR WATER DAMAGE

CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BODY GROUND)

DTC B2277 Detecting Vehicle Submersion


DESCRIPTION

This DTC is output when the submersion circuit monitor inside the power source control ECU detects that the vehicle is submerged in water.
HINT:
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC No.
DTC Detection Condition
Trouble Area
B2277
Submersion circuit monitor inside power source control ECU detects that vehicle is submerged in water
Power source control ECU

INSPECTION PROCEDURE

1.CHECK FOR WATER DAMAGE

  1. Check the power source control ECU, peripheral components, and wire harnesses for traces of water.

    OK:
    There are no traces of water.


NG
TAKE APPROPRIATE MEASURES AGAINST CAUSE OF WATER DAMAGE AND REPLACE POWER SOURCE CONTROL ECU
OK


2.CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BODY GROUND)


    Lexus Is250, Is220D. Gse20 Ale20.4Gr-Fse Starting.Starting System. Dtc B2277 Detecting Vehicle Submersion

  1. Disconnect the ECU connector.

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

    Standard resistance:
    Tester Connection (Symbols)
    		Condition
    		Specified Condition
    J55-6 (GND2) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER SOURCE CONTROL ECU