Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2025HIGHLANDER PLATINUMREPAIR AND DIAGNOSISGENERAL INFORMATIONDTC INDEXDTC INDEX (1 OF 6)CELLULAR COMMUNICATION DTCSSAFETY CONNECT SYSTEM
2025 Toyota Highlander Platinum
Safety Connect System
2025 Toyota Highlander PlatinumSECTION Safety Connect System
SAFETY CONNECT SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [12/2019 - 10/2022]
| DTC Code | Description |
|---|---|
| B1537-11 | Telephone Sub Antenna Circuit Short to Ground |
| B1537-13 | Telephone Sub Antenna Circuit Open |
| B1570-11 | Indicator (Red) Circuit Short to Ground |
| B1570-13 | Indicator (Red) Circuit Open |
| B1571-11 | Indicator (Green) Circuit Short to Ground |
| B1571-13 | Indicator (Green) Circuit Open |
| B1572-13 | Microphone Circuit Open |
| B15A8-04 | DCM System Internal Failure |
| B15C1-11 | GNSS Antenna Circuit Short to Ground |
| B15C1-13 | GNSS Antenna Circuit Open |
| B15C4-64 | Airbag Signal Signal Plausibility Failure |
| B15C5-11 | Emergency Call Switch Circuit Short to Ground |
| B15C5-13 | Emergency Call Switch Circuit Open |
| B15CB-11 | Telephone Main Antenna Circuit Short to Ground |
| B15CB-13 | Telephone Main Antenna Circuit Open |
| B15CC-49 | Backup Battery Internal Electronic Failure |
SAFETY CONNECT SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [10/2022 - 11/2024]
| DTC Code | Description |
|---|---|
| B1537-11 | Telephone Sub Antenna Circuit Short to Ground |
| B1537-13 | Telephone Sub Antenna Circuit Open |
| B1570-11 | Indicator (Red) Circuit Short to Ground |
| B1570-13 | Indicator (Red) Circuit Open |
| B1571-11 | Indicator (Green) Circuit Short to Ground |
| B1571-13 | Indicator (Green) Circuit Open |
| B1572-13 | Microphone Circuit Open |
| B15A8-04 | DCM System Internal Failure |
| B15C1-11 | GNSS Antenna Circuit Short to Ground |
| B15C1-13 | GNSS Antenna Circuit Open |
| B15C4-64 | Airbag Signal Signal Plausibility Failure |
| B15C5-11 | Emergency Call Switch Circuit Short to Ground |
| B15C5-13 | Emergency Call Switch Circuit Open |
| B15CB-11 | Telephone Main Antenna Circuit Short to Ground |
| B15CB-13 | Telephone Main Antenna Circuit Open |
| B15CC-49 | Backup Battery Internal Electronic Failure |
SAFETY CONNECT SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [11/2024 - ]
| DTC Code | Description |
|---|---|
| B1537-11 | Telephone Sub Antenna Circuit Short to Ground |
| B1537-13 | Telephone Sub Antenna Circuit Open |
| B1570-11 | Indicator (Red) Circuit Short to Ground |
| B1570-13 | Indicator (Red) Circuit Open |
| B1571-11 | Indicator (Green) Circuit Short to Ground |
| B1571-13 | Indicator (Green) Circuit Open |
| B1572-13 | Microphone Circuit Open |
| B15A8-04 | DCM System Internal Failure |
| B15C1-11 | GNSS Antenna Circuit Short to Ground |
| B15C1-13 | GNSS Antenna Circuit Open |
| B15C4-64 | Airbag Signal Signal Plausibility Failure |
| B15C5-11 | Emergency Call Switch Circuit Short to Ground |
| B15C5-13 | Emergency Call Switch Circuit Open |
| B15CB-11 | Telephone Main Antenna Circuit Short to Ground |
| B15CB-13 | Telephone Main Antenna Circuit Open |
| B15CC-49 | Backup Battery Internal Electronic Failure |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.