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.

Vehicle in Service Mode.
Verify that DTC U2401 is not set.
- If the DTC is set
  Refer to DTC U2401 .
- If the DTC is not set
Verify each scan tool Hybrid/EV Battery 1-96 parameters are between 3.45-4.05 V and all readings are within 0.03 V of each other.
- If not between 3.45-4.05 V or not within 0.03 V of each other
  Refer to DTC P0B3B-P0BBB, P1B16-P1B2D, P1B45-P1BFE, P1E01-P1E06 or P1E4C-P1E8B .
- If between 3.45-4.05 V and within 0.03 V of each other
Verify that DTC U2603, U2604, U2605, U2606, U2617, U2618, U2619, U2620, U2621, U2622, U2623 or U2624 is not set.
- If any of the DTCs are set
  Replace the K16 Battery Energy Control Module.
- If none of the DTCs are set
All OK.