Garmin ELOG, Owner'S Manual

Diagnostic Definitions

Power Data Diagnostic Event: The adapter did not receive power, or was not fully functional, for a period of 

time.

1

Check the vehicle diagnostic port connections.

2

Verify the adapter is firmly plugged into the vehicle diagnostic port.

3

Review all affected driver logs for missing or incorrect data.

Engine Synchronization Data Diagnostic Event: The adapter failed to synchronize with the vehicle engine 

computer to record required engine data for driver logs.

1

Check the vehicle diagnostic port connections.

2

Verify the adapter is firmly plugged into the vehicle diagnostic port.

3

Review all affected driver logs for missing or incorrect data.

Missing Required Data Elements Data Diagnostic Event: The Garmin eLog system failed to obtain one or more 

required data elements when recording driver logs.

1

Check the vehicle diagnostic port connections.

2

Verify the adapter is firmly plugged into the vehicle diagnostic port.

3

Check the Bluetooth settings on the device running the Garmin eLog app, and verify the device and the 
adapter are connected.

4

Check the GPS settings on the device running the Garmin eLog app, and verify the device settings allow 
location positions to be shared with the Garmin eLog app.

5

Review all affected driver logs for missing or incorrect data.

Data Transfer Data Diagnostic Event: A failure occurred with the method for transferring roadside inspection 

reports.
Perform the following actions:

1

Check the Bluetooth settings on the device running the Garmin eLog app, and verify the device and the 
adapter are connected.

2

Verify all USB storage devices used to transfer roadside inspection reports are operating correctly.

3

If you have not performed a data backup within the previous seven days, back up your recorded Garmin 
eLog data to a USB storage device.

Unidentified Driving Records Data Diagnostic Event: At least 30 minutes of unidentified driving was recorded 

within the current 24 hour period, and over the previous 7 days.
• Drivers: Review and claim the unidentified driving time.
• Administrator: Review and assign the unidentified driving time to the respective drivers.

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Diagnostics and Malfunctions