DTC B1536: Short in Telephone SUB Antenna Circuit; DTC B1537: Open in Telephone SUB Antenna Circuit [06/2018 - 10/2019]: Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
These DTCs are stored when the DCM (Telematics Transceiver) detects an open or a short in the telephone and GPS antenna assembly (for Front Side) circuit. The DCM (Telematics Transceiver) oscillates and receives 824 - 894 MHz or 1850 - 1990 MHz radio-frequency signals through the telephone and GPS antenna assembly (for Front Side).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B1536 | Short in Telephone SUB Antenna Circuit | Telephone and GPS antenna assembly (for Front Side) impedance is lower than malfunction criterion for 10 seconds when power switch is on (IG). (Short circuit) |
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| B1537 | Open in Telephone SUB Antenna Circuit | Telephone and GPS antenna assembly (for Front Side) impedance is higher than malfunction criterion for 10 seconds when power switch is on (IG). (Open circuit) |
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