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Home >> Cadillac >> 2017 >> XT5 Base >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> Battery Inspection/Test >> Circuit/System Testing
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Circuit/System Testing

WARNING:

Unless directed otherwise, the ignition must be OFF with the key removed, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

For Vehicles equipped with OnStar® (UE1) with Back Up Battery:

The Back Up Battery is a redundant power supply to allow limited OnStar® functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar®module). Do not disconnect the main vehicle battery or remove the OnStar® fuse with the ignition key in any position other than OFF. Retained accessory power should be allowed to time out or be disabled (simply opening the driver door should disable retained accessory power) before disconnecting power. Disconnecting power to the OnStar® module in any way while the ignition is On or with retained accessory power activated may cause activation of the OnStar® Back-Up Battery system and will discharge and permanently damage the back-up battery. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The back-up battery is not rechargeable and once activated the back-up battery must be replaced.

  1. Verify the C1 Battery case is not cracked, broken, or damaged, which may be indicated by battery acid leakage.
    • If there is any apparent damage 

      Replace the C1 Battery.

    • If there is no damage 
  2. Verify that the battery cables are clean and tight. The battery terminal bolts should be torqued as specified in Fastener Specifications .
    • If the battery cables need to be cleaned or tightened 

      Clean as required and tighten as specified.

    • If the battery cables are clean and tight 
  3. Disconnect battery from the vehicle. There is no need to remove the battery from the vehicle.
  4. Connect the EL-50313 directly to the battery terminal posts.
  5. Select "Charging," "Diagnostic" and "Out of Vehicle" when setting up the test.
  6. Select the proper battery type, Flooded, AGM or Stop/Start AGM.
  7. Enter the CCA as shown on the battery label.
  8. Verify the test result is not REPLACE BATTERY or BAD CELL-REPLACE
    NOTE:

    Always write the test code displayed by the tester on the repair order for any warranty purposes. The number is a unique code that describes the test data for a particular battery at a particular time. The test code may occasionally repeat when you retest the same battery. More often, each test will result in a different code. Use the test code from the Out of Vehicle test.

    • If the test result is REPLACE BATTERY or BAD CELL-REPLACE 

      Replace the C1 Battery.

    • If the test result is not REPLACE BATTERY or BAD CELL-REPLACE but requires Charging 

      Conduct Charging System Test and Battery Electrical Drain/Parasitic Load Test

    • If Battery is Ok and doesn't require Charging 

      All Ok

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