DTC P0C78-63: Hybrid/EV Battery System Precharge Time Too Long - Circuit/component protection time-out: Action

WARNING: The PHEV battery pack casing must not be disassembled due to the risk of exposure to high voltage. Failure to comply with this instruction may result in personal injury or death.

Using the Jaguar Land Rover approved diagnostic equipment, check the electric power inverter converter module for related DTCs and refer to the relevant DTC index
Check the integrity of the electric power inverter converter high voltage cable connectors. Check that the connector latches are engaged fully. Rectify as necessary
Check the electric power inverter converter high voltage cable for damage. Install a new high voltage cable as necessary
Using the Jaguar Land Rover approved diagnostic equipment, run application - ECU Diagnostics/Battery Energy Control Module (BECM)/Clear DTCs. Retest. If the fault persists, raise a Technical Assistance (TA):
- Using the Jaguar Land Rover approved diagnostic equipment, run application - ECU Diagnostics/Battery Energy Control Module (BECM)/ECU Functions/Prior Approval - Display Traction Battery Data
- Attach the Pathfinder session file using 'Pathfinder Sessions'
- Use the Diagnostic Trouble Code (DTC) as a reference number in the Customer Comments field
- Describe primary and secondary diagnostics completed