DTK will not connect to the equipment
If DTK detects the datalink adapter but cannot establish communication with the vehicle or equipment, the issue may involve the diagnostic connection, vehicle power, adapter configuration, or communication network.
Expected result
DTK establishes communication with the supported equipment and identifies the available electronic control modules.
The user can access the supported diagnostic functions.
Troubleshooting steps
Step 1: Verify vehicle power
Ensure the vehicle's keyswitch is in the ON position.
For applications requiring the engine to be running, follow the appropriate service instructions.
Step 2: Verify the diagnostic connection
Ensure the datalink adapter is securely connected to the diagnostic connector.
Check for loose or damaged connections.
Step 3: Confirm adapter communication
Verify that DTK recognizes the selected adapter.
If the adapter is not detected, refer to the My Adapter Is Not Detected troubleshooting section.
Step 4: Verify equipment compatibility
Ensure the engine or equipment is supported by DTK.
Some older engine programs or communication protocols may require a different Cummins service tool.
Step 5: Restart the connection
- Disconnect from the equipment.
- Close and reopen DTK if necessary.
- Reconnect the adapter.
- Attempt to establish communication again.
Step 6: Check other applications
Ensure another diagnostic application is not actively using the same adapter.
Close other diagnostic applications and retry the connection.
DTK Mobile differences
DTK Mobile relies on a supported wireless adapter connection.
Ensure the mobile device remains within Bluetooth communication range.
If communication is interrupted, verify Bluetooth connectivity before attempting to reconnect.