Step-By-Step: Using a Manufacturer-Level Scan Tool to Diagnose Faulty Aftermarket Modules
To diagnose faulty aftermarket modules with a manufacturer-level scan tool, first gather the proper tool, safety gear, and OEM guidance. Verify vehicle compatibility and module fitment, then establish a stable baseline by locking onto the correct ECU and enabling the needed PIDs. Pull live data, note baselines, and compare against factory specs. Identify DTCs, distinguish…