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.
Serial Data Authentication Configuration
Before attempting to perform the Serial Data Authentication Configuration procedure,
- Make sure all CAN control modules are connected and communicating.
- Diagnose the following communication DTCs first: DTC U0073-U007E, U0100-U02FF, U1100-U12FF, U1600-U17FF, U1977, U1978, U2200-U23FF, and U2400-U25FF.
- If DTC U1962 is stored only as a history DTC and not retrieved as a current DTC, do not perform the Serial Data Authentication Configuration procedure.
- Ignition/Vehicle OFF, keep the key inside the vehicle.
- Access the Service Programming System (SPS) and follow the on-screen instructions.
- To the left side of the SPS Supported Controllers screen in the TIS system.
- In the lower right corner of the SPS Supported Controllers screen in the Techline Connect system.
- On the SPS Supported Controllers screen, select Serial Data Authentication Configuration button and follow the on-screen instructions.
- Ignition/Vehicle OFF, disconnect the scan tool from the vehicle, all access doors closed, all vehicle systems OFF, and all keys at least 3 m (9.8 ft) away from vehicle. Allow the vehicle to go into sleep mode.
- Ignition ON/Vehicle In Service Mode.
- Using a scan tool, clear DTCs.
The Serial Data Authentication Configuration button is located in the following location:
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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.
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