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 MANUALSBUICK2013REGAL TURBO PREMIUM, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 152 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B2625CIRCUIT/SYSTEM TESTING
2013 Buick Regal Turbo Premium, Standard Trans
Circuit/System Testing
2013 Buick Regal Turbo Premium, Standard TransSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2012 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X1 harness connector at the P17 info display module.
- Test for less than 10 Ξ© between the ground circuit terminal 2 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Ignition ON, radio ON, verify a test lamp illuminates between the remote enable signal circuit terminal 6 and ground.
- If the test lamp does not illuminate, test the remote enable signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A11 radio.
- Lights ON, set the dimming switch to full bright. Test for 1-1.5 V on the display dimming control circuit terminal 3.
- If less than the specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A11 radio.
- If greater than the specified value, test the control circuit for a short to voltage. If the circuit tests normal, replace the A11 radio.
- Use the dimming switch to decrease the dimming level to full dim. Verify the voltage increases steadily to 6-7 V at full dim.
- If less than the specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A11 radio.
- If greater than the specified value, test the control circuit for a short to voltage. If the circuit tests normal, replace the A11 radio.
- If all circuits test normal, replace the P17 info display module.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.