ENTRY AND START SYSTEM(for Start Function), Diagnostic DTC:B2277

DTC Code DTC Name
B2277 Detecting Vehicle Submersion

DESCRIPTION

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

Tech Tips

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2277 Detecting Vehicle Submersion The water submersion detection circuit in the power management control ECU detects water submersion (1-trip detection logic*).

  • Submersion of power management control ECU in water

  • Power management control ECU

DTC Output Confirmation Operation:


  • Wait 300 seconds after connecting the cable to the negative (-) auxiliary battery terminal.

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
The power switch cannot be turned off and the hybrid control system cannot be started. -

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

Tech Tips

Related Data List and Active Test Items
DTC No. Data List Item Active Test Item
B2277 - -

Tech Tips

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.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.


      Body Electrical > Power Source Control > Clear DTCs

    2. Turn the power switch on (IG).

    3. After 330 seconds have elapsed, check for DTCs.


      Body Electrical > Power Source Control > Trouble Codes
      OK
      DTC B2277 is not output.

      Tech Tips

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

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    END (USE SIMULATION METHOD TO CHECK) Click here

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU Click here