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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Data Communication System - DTC B1000 To DTC U1818 >> Diagnostic Information and Procedures >> DTC P0A1F, P1A01, P1A05 or P1A06: Battery Energy Control Module >> Circuit/System Verification

Circuit/System Verification

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 1000V 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.

  1. Vehicle in Service Mode.
  2. Verify that DTC P1A01 is not set.
    NOTE: If the power is interrupted at exactly the time the K16 Battery Energy Control Module is writing to its memory, it may set a false P1A01 DTC.
    • If DTC P1A01 is set 
    1. Vehicle OFF and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down.
    2. Vehicle in Service Mode.
    3. Verify that the DTC does not set.
      • If the DTC sets, replace the K16 Battery Energy Control Module.
      • If the DTC does not set
    4. All OK.
    • If DTC P1A01 is not set 
  3. Verify that DTC P0A1F, P1A05 or P1A06 is not set.
    • If any of the DTCs are set 

      Replace the K16 Battery Energy Control Module.

    • If none of the DTCs are set 
  4. All OK
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