With Carbon Pile Tester

Vehicle ON.
Verify that no K1 14 V Power Module or B18 Battery Current Sensor DTCs are set that would cause a charging system concern.
- If an applicable DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If no applicable DTCs are set
Vehicle OFF.
Test for 12.4 V or greater at room temperature across the C1 Battery terminals.
- If not within the specified range
  Refer to Battery Inspection/Test .
- If within the specified range
Connect a carbon pile tester to the C1 Battery.
Vehicle ON, turn all accessories off. Observe the voltage reading on the tester. The voltage should read between 12.6-15.5 V.
Adjust the carbon pile tester so that the Low - Voltage Battery Current parameter on the 14 V Power Module data list of the Engine Control Module is reading 160 amps.
Verify the voltage reading remains between 12.6-15.5 V.
- If not within the specified range
  Replace the K1 14 V Power Module.
- If within the specified range
All OK.