Circuit/System Testing
WARNING: This page is about a different car, the 2013 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, verify that no K1 14V power module 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 12.4 V or greater at room temperature.
- If not within the specified range, refer to Battery Inspection/Test
- Connect a carbon pile tester to the C1 battery.
- Start and idle the engine, turn all accessories off. Observe the voltage reading on the tester. The voltage should read between 12.6-15.5V.
- Adjust the carbon pile tester so that the 12V current on the 14V power module data list is reading 120 amps. The voltage reading should remain between 12.6-15.5V.
- If not within the specified value, replace the K1 14V power module.