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 certification ECU (smart key ECU assembly) is detected.

Tip:

When the cable is disconnected and reconnected to the negative (-) 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 certification ECU (smart key ECU assembly) detects water submersion (1-trip detection logic*).

  • Submersion of certification ECU (smart key ECU assembly) in water

  • Certification ECU (smart key ECU assembly)

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

  • *: Only detected while a malfunction is present.

Table 1. Vehicle Condition and Fail-safe Function when Malfunction Detected

Vehicle Condition when Malfunction Detected

Fail-safe Function when Malfunction Detected

The engine switch cannot be turned off and the engine cannot be started.

-
Table 2. Related Data List and Active Test Items

DTC No.

Data List Item

Active Test Item

B2277

-

-

CAUTION / NOTICE / HINT

Note:

  • When using the GTS with the engine 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 the 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 a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click hereClick here). Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Start Function) precaution.

    Click hereClick here

  • After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

Tip:

Before proceeding with troubleshooting, check if there are any signs of water damage to the certification ECU (smart key ECU assembly). If there are any signs of water damage, replace the certification ECU (smart key ECU assembly) 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 engine switch on (IG).

    3. After 330 seconds have elapsed, check if the DTC has been output again.

    OK

    DTC B2277 is not output

    Tip:

    If there are any signs that water was present, before replacing the certification ECU (smart key ECU assembly), take measures to prevent any further water entry.

    Result

    Proceed to

    OK

    NG
    OK

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick hereClick hereClick hereClick hereClick here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)