B2277

THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2277: Detecting Vehicle Submersion
B2277 - Detecting Vehicle Submersion

DESCRIPTION

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

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





* *: Only output while a malfunction is present and the engine switch is on (IG)

Vehicle Condition and Fail-safe Function when Malfunction Detected





INSPECTION PROCEDURE

NOTICE:
* When using the Techstream with the engine 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 Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Key / Trouble Codes.
* The smart key 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 How to Proceed With Troubleshooting.
* 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





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

PROCEDURE

1. CHECK FOR WATER DAMAGE

(a) Check for any signs of water damage to the power source control ECU, surrounding parts, wire harnesses and connectors.

Result





B -- TAKE MEASURES AGAINST CAUSE OF WATER DAMAGE AND REPLACE POWER SOURCE CONTROL ECU

A -- REPLACE POWER SOURCE CONTROL ECU Removal