Dtc B2277 Detecting Vehicle Submersion

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Theft Deterrent Keyless Entry. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

INSPECTION PROCEDURE

CHECK FOR WATER DAMAGE

DTC 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.
HINT:
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 Code
DTC Detection Condition
Trouble Area
DTC Output Confirmation Operation
B2277
The water submersion detection circuit in the certification ECU (smart key ECU assembly) detects water submersion (1-trip detection logic*).
Certification ECU (smart key ECU assembly)
Wait 300 seconds after connecting the cable to the negative (-) battery terminal.
  1. *: Only detected while a malfunction is present.

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.
-

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

INSPECTION PROCEDURE

NOTICE:
  1. 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 vehicle type under manual mode and enter the following menus:
    Body Electrical / Entry&Start. 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.
  2. 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 here). Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.
  3. Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Start Function) precaution (Click here).
  4. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
HINT:
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.
1.CHECK FOR WATER DAMAGE

  1. Check the certification ECU (smart key ECU assembly), its surrounding area and wire harnesses have no signs of water intrusion.

    Result
    Result
    		Proceed to
    No signs of water damage
    		A
    Signs of water damage
    		B



B
TAKE MEASURES AGAINST CAUSE OF WATER DAMAGE AND REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
A

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)