2.2.2 System Scan This function will scan all systems of the vehicle. 2.2.3 Choose to Scan Scan the manually selected vehicle electronic control system. As an example, tap “PCM," then tap “Choose to Scan" to scan the system. Tap “PCM" and tap “Enter." The following page will appear. Note: This function will be available only if the diagnostic software supports it. A. Version Information EN I 16 This function reads the current version information of ECU.