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 submersion monitor circuit inside the power management control ECU is detected.

Tech Tips

When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode is reset to on (IG). When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC Code DTC Detection Condition Trouble Area
B2277 A malfunction in the submersion monitor circuit inside the power management control ECU is detected.

  • Submerged power management control ECU

  • Power management control ECU

CAUTION / NOTICE / HINT

Note


  • When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the vehicle, and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.

  • Before performing the inspection, check that there are no problems related to the CAN communication system and LIN communication system.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK FOR TRACES OF WATER


    1. Check the power management control ECU, peripheral components, and wire harnesses for traces of water.

      Result
      Result Proceed to
      There are no traces of water. A
      There are traces of water. B

    A

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    B

    TAKE APPROPRIATE MEASURES AGAINST CAUSE OF WATER DAMAGE AND REPLACE POWER MANAGEMENT CONTROL ECU