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Home >> Buick >> 2019 >> Regal Base >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> Charging System Test >> Circuit/System Verification

Circuit/System Verification

NOTE:

Do not have a battery charger connected during the generator testing.

  1. Ignition - On/Vehicle - In Service Mode
  2. Verify the charge indicator is On while the instrument cluster performs the bulb check. Approximately 4 seconds.
    • If the indicator is Off during the bulb check. Approximately 4 seconds 

      Replace P16 Instrument Cluster

    • Go to next step: If the indicator is On during the bulb check. Approximately 4 seconds 
  3. Verify there are no DTCs set related to the following system/component:
    • B18 Battery Current Sensor (If applicable)
    • B110 Battery Sensor Module (If applicable)
    • G13 Generator
    • Energy Management
    • Stop/Start System (KL9)
    • Go to next step: If no DTC is set 
  4. Increase the engine speed slowly to 2500 RPM. All accessories OFF.
  5. Verify the scan tool Battery Voltage parameter is between 12.0 - 15.8 V
    • If not between 12.0 - 15.8 V 

      Refer to Circuit System Testing

    • Go to next step: If between 12.0 - 15.8 V 
  6. Turn the following components ON:
    • Headlamps
    • Rear Defogger
    • Blower Motor at maximum speed
  7. Increase the engine speed slowly to 2500 RPM. Verify the scan tool Battery Voltage parameter is between 12.6 - 15.8 V.
    • If not between 12.6 - 15.8 V 

      Refer to Circuit System Testing

    • Go to next step: If between 12.6 - 15.8 V 
  8. Verify the charge indicator on the instrument cluster is Off and the Driver Information Center (DIC) does not display any charging system error message.
    • If the indicator is On 

      Refer to Circuit System Testing

    • Go to next step: If the indicator is Off 
  9. Verify the scan tool Body Control Module Battery Voltage parameter increases when controlling the Body Control Module Generator Regulator Setpoint from 40% to 80% with a scan tool. It may take up to 10 s for the battery voltage to stabilize between each Setpoint change.

    Refer to Charging System Description and Operation .

    • If the battery voltage does not increase 

      Refer to Circuit/System Testing.

    • Go to next step: If the battery voltage increases 
  10. All OK.
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