08-184-26

Flash: Electric Vehicle Control Unit (EVCU) Updates - PCR8A3 Customers may experience the following:
• The vehicle will not start and cannot be keyed off. NOTE: The vehicles 12V system remains powered up.
• Engine Stop/Start (ESS) bumps or lack of refinement.
• Rough Road Cruise Control (RRCC) function inoperable.
• Vehicle rolls back during low-speed Advanced Driver Assistance Systems (ADAS) usage when on a hill. The following software enhancements are also available:
• Diagnostic improvements for DTCs P061B, P3034 and U0111.
• Improved torque transitions when changing drive modes.
• Improved torque management for garage shifts.
• Improved fault reactions, allowing better limp-home functionality with critical faults.
• Improved ESS refinement.
• Updated Data Identifier Diagnostics to report target values of actuators.
• Coordinated change with Battery Pack Control Module (BPCM) to prevent High Voltage battery draining during module flashing.
• Improved CAN bus management, fixing conditions that prevent customer from starting the car and/or keying-off.
• Rough Road Cruise Control (RRCC) feature enablement.
• Improved torque control to prevent "bump" or "sailing" feel during downhill coasting.
• Torque control enhancement to prevent vehicle rollback during low-speed ADAS usage. This bulletin involves inspecting and possibly reprogramming the Battery Pack Control Module (BPCM), Drive Motor Power Inverter (DMPI), EVCU and Powertrain Control Module (PCM) with the latest available software.