LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2024 >> Sierra EV >> Repair and Diagnosis >> Electrical >> Charging Systems >> Plug-In Charging >> Diagnostic Information and Procedures >> DTC P0CF9 >> 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 On
  2. Verify DTC P0CF5, P0CF6 is not set
    • Go to next step: If the DTC is not set 
  3. Verify that DTC P0CF9 is the only DTCs set.
    • If the DTC is set 

      Replace the component: K16A Battery Energy Control Module 1

    • Go to next step: If the DTC is not set 
  4. Verify that no other DTC(s) are set.
    • Go to next step: If no DTC is set 
  5. All OK.