DTC B1551: HD Radio Tuner Malfunction; DTC B15A0: LAN Master Malfunction; DTC B15B3: Radio Tuner Malfunction; DTC B15B4: CD Changer Malfunction; DTC B15B7: Bluetooth Module Malfunction; DTC B15BA: XM Tuner Malfunction; DTC B15F9: UART Communication Malfunction(for A/C) [06/2018 - 09/2022]: Description

WARNING: This page is about a different car, the 2022 Lexus ES 300h, 2021 Lexus ES 300h, 2020 Lexus ES 300h, and 2019 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

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
B15B7	Bluetooth Module Malfunction	"Bluetooth" module malfunction	Radio receiver assembly
B15BA	XM Tuner Malfunction	When either of the following conditions is met: Internal IC malfunction Tuner 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