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Home >> Cadillac >> 2009 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> Charging System Test >> Circuit/System Testing

Circuit/System Testing

  1. Ignition ON, verify that no generator or battery current sensor DTCs are set that would cause a charging system concern.
  2. Ignition OFF, measure the voltage across the battery terminals. The voltage should read 12.0 volts or greater at room temperature.
  3. Connect a carbon pile tester to the battery.
  4. Start the engine and increase the engine speed to 2,500 RPM. Observe the voltage reading on the tester. The voltage should read between 12.6-15.0 volts.
    • If not within specified range, replace the generator.
  5. Adjust the carbon pile tester to the specified load test output value, refer to Generator Usage .
    • If not within specified value, replace the generator.
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