Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Wireless Starter Component Internal Failure (B277A96)

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System (for Start Function, Gasoline Model) / Wireless Starter Component Internal Failure (B277A96)

DESCRIPTION

If the remote engine start ECU does not respond to the certification ECU (smart key ECU assembly) or the remote engine start ID is not registered, this DTC is stored.

HINT:

Registration status of the remote engine start ECU ID can be checked using the "Wireless C Code" item in the Data List.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

B277A96

Wireless Starter Component Internal Failure

One of the following conditions is met (1 trip detection logic*):

  • A remote start communication error occurs.
  • Response is not possible.
  • Registration has not been performed.
  • CAN communication system
  • Remote engine start ECU
  • Certification ECU (smart key ECU assembly)
DTC output confirmation operation:
  • A remote start operation is performed.
  • *: Only output while a malfunction is present.
Vehicle Condition and Fail-safe Operation when Malfunction Detected

Vehicle Condition when Malfunction Detected

Fail-safe Operation when Malfunction Detected

Engine does not start with remote start operation

Engine cannot be started by remote start operation only
Related Data List and Active Test

DTC No.

Data List and Active Test

B277A96

-

CAUTION / NOTICE / HINT

NOTICE:

  • When using the GTS with the ignition 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 / Smart Key. 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 smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here

  • Before replacing the certification ECU (smart key ECU assembly), refer to Registration.

    Click here

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

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check for CAN communication system DTCs.

Click here

OK:

CAN communication DTCs are not output.

NG

GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

OK

2.

REGISTER REMOTE ENGINE STARTER ID

(a) Register the remote engine starter ID.

OK:

Registration can be completed.

NG

REPLACE SMART KEY ECU ASSEMBLY (SMART KEY ECU ASSEMBLY)

OK

3.

CHECK REMOTE ENGINE STARTER FUNCTION

(a) Check the remote engine starter function.

OK:

Remote engine starter functions operate normally.

OK

END (REMOTE ENGINE STARTER ID WAS NOT REGISTERED)
NG

REPLACE REMOTE ENGINE START ECU

    READ NEXT:

     Steering Lock System Missing Message (B278187,B278196,B278211,B278215,B279F1C)

    DESCRIPTION As this DTC is not normally output, it may be due to noise in the LIN communication system, etc. DTC No. Detection Item DTC Detection Condition Trouble Area Note B2

     Antenna Coil Circuit Voltage Out of Range (B27841C)

    DESCRIPTION When an open or short circuit is detected in the transponder key amplifier coil built into the engine switch, the certification ECU (smart key ECU assembly) stores this DTC. This DTC is al

     ID-BOX Component Internal Failure (B278D96)

    DESCRIPTION When the certification ECU (smart key ECU assembly) detects an input signal indicating that the vehicle is equipped with an ID code box even though the ID code box is not registered, the c

    SEE MORE:

     Hazard Warning Switch Circuit

    DESCRIPTION The combination meter assembly receives the hazard warning signal switch assembly on signal and controls the operation of the hazard warning lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replacing the combination meter assembly, always replace it with a new one. If a c

     Left Front Wheel Speed Sensor Signal Stuck High (C050024)

    DESCRIPTION Refer to DTC C050012 Click here DTC No. Detection Item DTC Detection Condition Trouble Area C050024 Left Front Wheel Speed Sensor Signal Stuck High The speed sensor signal is not within the specified

    © 2020-2024 Copyright www.tcorollacross.com