Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: HD Radio Tuner Malfunction (B1551,B15A0,B15B3-B15B5,B15B7,B15F9)

DESCRIPTION

These DTCs are stored when a malfunction occurs in the radio receiver assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1551

HD Radio Tuner Malfunction

When any of the following conditions is met:

  • "HD Radio" tuner decoder malfunction
  • "HD Radio" tuner audio output section malfunction
  • "HD Radio" tuner decoder RF/IF malfunction

Radio receiver assembly

B15A0

LAN Master Malfunction

When either of the following conditions is met:

  • Bus malfunction
  • EEPROM error

Radio receiver assembly

B15B3

Radio Tuner Malfunction

When any of the following conditions is met:

  • AM tuner PLL is unlocked
  • FM tuner PLL is unlocked
  • Tuner malfunction

Radio receiver assembly

B15B4

CD Changer Malfunction

When any of the following conditions is met:

  • Mechanism drive signal malfunction
  • Load/Eject malfunction
  • Read mechanism malfunction
  • Mechanical malfunction

Radio receiver assembly

B15B5

DVD Changer Malfunction

When any of the following conditions is met:

  • Mechanism drive signal malfunction
  • Load/Eject malfunction
  • Read mechanism malfunction
  • Mechanical malfunction

Radio receiver assembly

B15B7

Bluetooth Module Malfunction

"Bluetooth" module malfunction

Radio receiver assembly

B15F9

UART Communication Malfunction(for A/C)

When either of the following conditions is met:

  • Open in UART communication line is detected during radio receiver assembly startup routine
  • Open in UART communication line is detected based on communication error

Radio receiver assembly

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

Click here

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE RADIO RECEIVER ASSEMBLY

    Extension Module Disconnected 2 (B1543)
    DESCRIPTION If the radio receiver assembly cannot detect the navigation ECU for a certain period of time (90 seconds) after the engine switch is turned on (ACC) and the radio receiver assembly confirm ...

    Extension Module Malfunction 2 (B1556)
    DESCRIPTION This DTC is stored when a malfunction occurs in the Navigation ECU. DTC No. Detection Item DTC Detection Condition Trouble Area B1556 Extension Module Malfunction 2 When a ...

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