Dtc B2277 Detecting Vehicle Submersion

Lexus IS250 IS220d GSE20 ALE20 2AD-FHV STARTING

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 ConditionTrouble 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

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)
Dtc B2277 Detecting Vehicle Submersion. 2AD-FHV STARTING. Lexus IS250 IS220d GSE20 ALE20

Disconnect the ECU connector.

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

  • Standard resistance:
  • Tester Connection (Symbols)ConditionSpecified Condition
    J55-6 (GND2) - Body groundAlwaysBelow 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE POWER SOURCE CONTROL ECU