LI54.10-P-062091_Ver_1 PDF

A technical documentation that addresses issues with the head unit display failing after engine start due to overvoltage in the ESP control unit. It discusses the complaint related to the head unit display and other electronic stability faults, identifying potential electrical faults in the backup battery systems. Solutions such as checking the backup battery coupling relay and using diagnostic tools are proposed. Fault codes and parts involved, such as the backup battery coupling relay and auxiliary battery, are listed along with their diagnostics and repair instructions.