The clicking sound is likely the internal vehicle communication relay. This indicates the VCI is attempting to communicate but failing, often due to an incompatible firmware version for that particular car model.
If your firmware update fails or the device is unresponsive, follow these troubleshooting steps: Ensure Stable Power: Always connect the VCI to a stable 12V power supply
Troubleshooting the Delphi DS100E Firmware Update Problem: A Comprehensive Guide delphi ds100e firmware update problem full
What are you trying to connect with? Are you using a genuine device or a clone hardware unit?
One final warning: counterfeit DS100E units (common on eBay and Amazon Marketplace) never update correctly. If your device’s serial number does not validate on the official Delphi portal, throw it away—no firmware tweak will save it. The clicking sound is likely the internal vehicle
Select . The software should detect the tester, even if it says the firmware is outdated. Click the Update button.
: If the device is unresponsive, some users resolve this by manually replacing the firmware files in the C:\Program Files\Delphi\Firmware Are you using a genuine device or a clone hardware unit
Before diving into technical fixes, check these three physical bottlenecks:
The DS100E was discontinued in 2021 for most markets. Spare parts are drying up. You should consider a replacement device (e.g., Autel MaxiCOM Ultra, Launch X431 V+, or the newer Delphi DS150E sequel) if:
Users experiencing this issue typically report the following behaviors:
Ensure the vehicle battery voltage is above 12.6V during the update process. Try a different USB port.