DTC B1537-11: Telephone Sub Antenna Circuit Short to Ground; DTC B1537-13: Telephone Sub Antenna Circuit Open [08/2020 - ]: Description

WARNING: This page is about a different car, the 2022 Toyota Avalon and 2021 Toyota Avalon. 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 telephone and GPS antenna (for Front Side).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1537-11	Telephone Sub Antenna Circuit Short to Ground	Telephone antenna (sub) impedance (Ω) is lower than the malfunction threshold for 10 seconds or more when the ignition switch is ON (Short circuit)	DCM (telematics transceiver) Telephone and GPS antenna assembly (for Front Side) Telephone and GPS antenna cord (No. 4 antenna cord sub-assembly) Telephone and GPS antenna cord (No. 6 antenna cord sub-assembly)
B1537-13	Telephone Sub Antenna Circuit Open	Telephone antenna (sub) impedance (Ω) is higher than the malfunction threshold for 10 seconds or more when the ignition switch is ON (Open circuit)	DCM (telematics transceiver) Telephone and GPS antenna assembly (for Front Side) Telephone and GPS antenna cord (No. 4 antenna cord sub-assembly) Telephone and GPS antenna cord (No. 6 antenna cord sub-assembly)