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.
DTC B1412 (2014 2015 2016)
DTC B1412 : TEL Antenna Disconnected
| DTC Description | DTC |
|---|---|
| B1412 TEL Antenna Disconnected |
DTC (Telematics System)
Check the connectors for poor connections or loose terminals.
- Problem verification
-1. Clear the DTCs with the HDS.
- 2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.
- 3. Check for DTCs with the HDS.
DTC Description DTC B1412 TEL Antenna Disconnected Is DTC B1412 indicated?
YES
The failure is duplicated, go to step 2.
NO
Intermittent failure, the system is OK at this time.
- Determine possible failure area (XM/TEL antenna, others)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
XM/TEL antenna connector A (4P) - 3. Turn the vehicle to the ON mode.
- 4. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode XM/TEL antenna connector A (4P): disconnected Test circuit TEL Test point 1 XM/TEL antenna connector A (4P) No. 2 Test point 2 Body ground Is there about 3.0 V?
YES
NO
Go to step 3.
- Open wire check (TEL line)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
Telematics control unit connector C (4P) - 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode XM/TEL antenna connector A (4P): disconnected Telematics control unit connector C (4P): disconnected Test circuit TEL Test point 1 XM/TEL antenna connector A (4P) No. 2 Test point 2 Telematics control unit connector C (4P) No. 1 Is there continuity?
YES
Replace the telematics control unit .
NO
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.