Basic Troubleshooting (BMW Diagnostic System)

Personally verify customer complaint. Verify that complaint is truly a system malfunction. Perform QUICK TEST to determine if vehicle systems have logged fault codes. Call up faulted system or appropriate test schedule to verify correct control module is installed in car. Follow Diagnostic Information System (DIS) on screen instructions and perform all tests as specified. Use DIS and fault symptom diagnostic procedures. Follow appropriate test module procedures for systems that malfunction but fail to set faults in memory.