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.
Synchronize And Register ONSTAR After Replacing Parts (ASN 1103-03)
Reference number: ASN 1103-03
SYNCHRONIZE AND REGISTER ONSTAR AFTER REPLACING PARTS
TECHNICAL SERVICE BULLETIN
| ACURA: | All models |
| CATEGORY: | Acura Service News |
| APPLIES TO: | All models |
SERVICE INFORMATION
If you replace an OnStar radio frequency (RF) unit or an OnStar control unit, you must synchronize the RF unit to the control unit. You must also register the new unit(s) with OnStar. If you don't synchronize and register, OnStar won't work.
To synchronize, start the engine, then press and hold the "dot" button on the rearview mirror. The OnStar LED indicator changes from green to red, then back to green. The total process only takes about 20 seconds. When the LED turns back to green, the synchronization, sometimes called a handshake, is complete.
To register, call OnStar dealer support (not using OnStar) at their new number, 888-390-4050, and register the new serial numbers: STID and ESN. Make sure you remind the support staff to update the customer's OnStar personal calling profile.
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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.