DTC    B2277    Detecting Vehicle Submersion

for Preparation Click here


DESCRIPTION

This DTC is stored when a malfunction in the water submersion detection circuit in the power management control ECU is detected.

HINT:
  1. When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) auxiliary battery terminal, the power source mode changes to on (IG).
  2. When the auxiliary battery cable is disconnected and reconnected, the power source returns to the mode it was in before the auxiliary battery cable was disconnected.


DTC Code
DTC Detection Condition
Trouble Area
DTC Output Confirmation Operation
B2277
The water submersion detection circuit in the power management control ECU detects water submersion (1-trip detection logic*).
  1. Submersion of power management control ECU in water
  2. Power management control ECU
Wait 300 seconds after connecting the battery cable.
  1. *: Only output while a malfunction is present and the power switch is on (IG)

Vehicle Condition and Fail-safe Function when Malfunction Detected 
Vehicle Condition when Malfunction Detected
Fail-safe Function when Malfunction Detected
The hybrid control system cannot be turned off and the hybrid control system cannot be started.
The power source mode changes to on (IG) and hybrid control system activation is prohibited.

INSPECTION PROCEDURE

NOTICE:
  1. When using the intelligent tester with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the intelligent tester and vehicle begins, or 2) connect the intelligent tester to the vehicle, select the vehicle type under manual mode, and then enter the following menus:
    for Power Source Control: Body / Power Source Control / DTC.
    for Entry&Start: Body / Entry&Start / DTC.
  2. The entry and start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting (Click here).
  3. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.


HINT:

Related Data List and Active Test Items 
DTC
Data List Item
Active Test Item
B2277
-
-

HINT:
Before proceeding with troubleshooting, check if there are any signs of water damage to the power management control ECU. If there are any signs of water damage, replace the power management control ECU and take measures against the cause of the water damage.

1.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Turn the power switch on (IG).

  1. After 330 seconds have elapsed, check if the DTC has been set again.

    OK:
    DTC B2277 is not output

HINT:
If there are any signs that water was present, before replacing the power management control ECU, take measures to prevent any further water entry.



NG
REPLACE POWER MANAGEMENT CONTROL ECU (Click here)
OK

USE SIMULATION METHOD TO CHECK (Click here)