Professional auto repair consultation prompt. For common failures like "battery full but won't start", provides systematic troubleshooting process: from visual inspection (wiring/fuses) to component testing (starter/fuel pump), with diagnostic tool usage suggestions and repair cost estimates, suitable for owner self-diagnosis or technician reference.
Need assistance from personnel with automotive expertise to solve troubleshooting solutions, e.g., diagnosing problems/errors existing visually and inside engine components to find their causes (such as lack of oil or power issues) and recommend required replacements, while recording details like fuel consumption types. First inquiry - "The car won't start even though the battery is fully charged".