Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: DCM System Internal Failure (B15A804)

Toyota Corolla Cross (2022-2025) Service Manual / Audio & Visual & Telematics / Cellular Communication / Safety Connect System / DCM System Internal Failure (B15A804)

DESCRIPTION

This DTC is stored when an internal circuit malfunction is detected by the DCM (telematics transceiver) self check.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15A804

DCM System Internal Failure

DCM (telematics transceiver) internal malfunction

DCM (telematics transceiver)

CAUTION / NOTICE / HINT

NOTICE:

  • Regardless of whether DTC B15A804 has been output as a present or history DTC, the DCM (telematics transceiver) should be replaced.
  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Safety Connect System.

    Click here

PROCEDURE

1.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (telematics transceiver) with a new one.

Click here

NOTICE:

  • The ignition switch must be off.
  • Do not exchange the DCM (telematics transceiver) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION

    READ NEXT:

     GNSS Antenna Circuit Short to Ground (B15C111,B15C113)

    DESCRIPTION These DTCs are stored when a malfunction occurs in the roof antenna assembly circuit. DTC No. Detection Item DTC Detection Condition Trouble

     Airbag Signal Signal Plausibility Failure (B15C464)

    DESCRIPTION If the DCM (telematics transceiver) detects an error in communication between the DCM (telematics transceiver) and the airbag ECU assembly as a result of the DCM (telematics transceiv

     Emergency Call Switch Circuit Short to Ground (B15C511,B15C513)

    DESCRIPTION This DTC is stored when the DCM (telematics transceiver) detects an open or short circuit in the manual (SOS) switch. DTC No. Detection Item DTC Detect

    SEE MORE:

     Customize Parameters

    CUSTOMIZE PARAMETERS CUSTOMIZE THEFT DETERRENT SYSTEM NOTICE: When the customer requests a change in a function, first make sure that the function can be customized. Be sure to make a note of the current settings before customizing. When troubleshooting a function, first make sure tha

     RSA (Road Sign Assist)

    The RSA system detects specific road signs using the front camera and/or navigation system (when speed limit information is available) and warns the driver via displays and buzzers. WARNING ■For safe use Driving safely is solely the responsibility of the driver. Pay careful attention to the su

    © 2020-2025 Copyright www.tcorollacross.com PT NL