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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> Electrical >> Body Electrical >> Hybrid/EV System Energy Storage >> Repair Instructions >> Hybrid/EV Battery System Verification >> Circuit/System Testing
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Circuit/System Testing

WARNING:

Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure includes the following steps:

  • Identify how to disable high voltage.
  • Identify how to test for the presence of high voltage.
  • Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:

  • Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors.
  • Certified and up-to-date Class "0" Insulation gloves rated at 1000 V with leather protectors.
    • Visually and functionally inspect the gloves before use.
    • Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not.

Failure to follow the procedures may result in serious injury or death.

WARNING: High voltage circuits should only be tested using a digital multimeter (DMM) and test leads with at least a CAT III rating, such as the J 39200-A Digital Multimeter. Failure to follow the procedures may result in serious injury or death.
WARNING:

This vehicle is equipped with a high voltage battery that is completely isolated from the chassis ground. Never utilize AC powered test equipment to probe the high voltage system. Serious injury, death and component damage could occur if the high voltage system is grounded through the electric utility.

Failure to follow the procedure exactly as written may result in serious injury or death.

WARNING:

Damage to a Lithium Ion hybrid/EV battery pack could result in fire, loss of electrical isolation or exposure to high voltage. Until the high voltage system inspection has been completed, store the vehicle with hybrid/EV battery pack installed outside in a secure area away from buildings and other vehicles and protected from rain, snow and other moisture. Remove the hybrid/EV battery pack high voltage manual disconnect lever and store it in a secure place outside the vehicle. Cover the exposed high voltage opening with UL® listed or equivalent, insulation tape rated at a minimum of 600 V.

Failure to follow these precautions could result in personal injury, death and property damage.

  1. Connect the EL-50332-125  to the EL-50332-270  .
    NOTE: Before performing the Hybrid/EV Battery System Verification, make sure all of the external EL-50332  components are in good condition and working order.
  2. Connect the EL-50332-125  to the EL-50332  .
  3. Connect the appropriate regional power cord to the EL-50332  .
  4. Connect the power cord into a known good power outlet.
  5. Turn ON the EL-50332  using the power switch.
  6. At the MAIN MENU, select PACK INFO, press the SELECT soft key.
  7. At the PACK INFO TYPE menu, select ONE-SHOT, press the NEXT soft key.
    NOTE: Selecting One-shot will take and display a single snapshot of the battery parameters, selecting Continuous will display live parameter values.
  8. At the MANUFACTURER menu, select correct BRAND, press the NEXT soft key.
  9. At the MODEL menu, select correct MODEL, press the NEXT soft key.
  10. At the COMM CONNECTION menu, select HYBRID BATTERY CONTACTOR ASSEMBLY, press the NEXT soft key.
  11. Connect the EL-50332-135  to the A4 Hybrid/EV Battery Pack.
  12. Connect the EL-50332-135  to the EL-50332-270  , press the NEXT soft key.
  13. At the PACK INFO menu, scroll down to the DELTA VCELL parameter. Record and verify the DELTA VCELL is less than 0.1 V.
    • If the DELTA VCELL is 0.1 V or greater 

      There is an internal battery pack concern. Inspect for conditions such as improper internal wiring connections or improper cell balancing service procedures.

    • The DELTA VCELL is less than 0.1 V 
  14. Record and verify all of the battery temperature sensor readings are within 6°C (10.8°F) of each other.
    • If any of the battery temperature sensor readings are 6°C (10.8°F) or greater of each other 

      There is an internal battery pack concern. Inspect for conditions such as improper internal wiring connections or damaged components.

    • The battery temperature sensor readings are within 6°C (10.8°F) of each other 
  15. All OK.
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