B2277

4GR-FSE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: B2277: Detecting Vehicle Submersion
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.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR WATER DAMAGE

(a) 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 -- Continue to next step.

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

(a) Disconnect the ECU connector.





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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER SOURCE CONTROL ECU