Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: 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 engine switch must be off.
  • Do not exchange the DCM (telematics transceiver) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION

    Microphone Circuit Open (B157213)
    DESCRIPTION This DTC is stored when the DCM (telematics transceiver) detects a malfunction in the telephone microphone assembly circuit. DTC No. Detection Item DTC Detection Condition Trouble ...

    GNSS Antenna Circuit Short to Ground (B15C111,B15C113)
    DESCRIPTION These DTCs are stored when a malfunction occurs in the telephone and GPS antenna (for Roof Side) circuit. DTC No. Detection Item DTC Detection Condition Trouble Area B15C111 ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Fuel System: Precaution
    PRECAUTION CAUTION: The fuel tank assembly is very heavy. Be sure to follow the procedure described in the repair manual, or the fuel tank assembly may fall off the engine lifter. To prevent serious injury due to fuel spray from the high-pressure fuel lines, always discharge fuel system pressu ...

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Shift Paddle Switch: Installation
    INSTALLATION PROCEDURE 1. INSTALL NO. 1 SWITCH WIRE HINT: Perform this procedure only when replacement of the No. 1 switch wire is necessary. (a) Engage the 6 clamps to install the No. 1 switch wire to the steering wheel assembly. (b) Engage the 2 guides. (c) Connect the steering vibration and heate ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2025 Copyright www.lexusrx.net
    0.0158