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 VARIANT/TRIMSECTION 14 (ENGINE ELECTRICAL SYSTEM - HYBRID (HP6))DIAGNOSTIC INFORMATION AND PROCEDURESCHARGING SYSTEM TESTCIRCUIT/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 variant/trim than selected.
- Ignition ON, verify that no G13 Generator or B18 battery current sensor DTCs are set that would cause a charging system concern.
- If DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle
- Ignition OFF, measure the voltage across the battery terminals. The voltage should read 12.0 V or greater at room temperature.
- If not within the specified value, refer to Battery Inspection/Test
- Engine ON, increase engine speed to 2,500 RPM. Verify the battery voltage is between 12.6-15.0 V.
- If not within specified range, replace the K59 Starter/Generator Control Module.
- Engine ON, increase engine speed to 2,500 RPM. Turn ON all vehicle accessories. Verify the battery voltage is between 12.6-15.0 V.
- If not within specified range, replace the K59 Starter/Generator Control Module.
NOTE:
Ensure vehicle accessories are OFF for the next step.
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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.