User Guide

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“The standard” in the following points refers to the “Technical Standard for Electronic Logging Devices
v.1.2, October 27, 2020.”
1. Power Compliance
➢ An ELD must set a power compliance malfunction if the power data diagnostics event described
in provision 4.6.1.1(a) of the Standard indicates an aggregated driving time understatement of 30
minutes or more on the ELD over a 24-hour period across all driver profiles, including the
unidentified driver profile.
2. Engine Synchronization
➢ An ELD must set an engine synchronization compliance malfunction if connectivity to any of the
required data sources specified in provision 4.3.1 of the Standard is lost for more than 30 minutes
during a 24-hour period aggregated across all driver profiles, including the unidentified driver
profile.
3. Timing Compliance
➢ The ELD must periodically cross-check its compliance with the requirement specified in provision
4.3.1.5 of the Standard with respect to an accurate external UTC source and must record a timing
compliance malfunction when it can no longer meet the underlying compliance requirement.
4. Positioning Compliance
➢ An ELD must monitor elapsed time during periods when the ELD fails to acquire a valid position
measurement within 8 kilometers of the CMV’s movement. When such elapsed time exceeds a
cumulative 60 minutes over a 24-hour period, the ELD must set and record a positioning
compliance malfunction.
5. Data Recording Compliance
➢ An ELD must monitor the completeness of the ELD event record information in relation to the
required data elements for each event type and must record a missing data elements data
diagnostics event for the driver if any required field is missing at the time of recording.
6. Monitoring Records Recorded under the Unidentified Driver Profile
➢ If more than 30 minutes of driving in a 24-hour period show unidentified driver on the ELD, the
ELD must detect and record an unidentified driving records data diagnostic event and the data
diagnostic indicator must be turned on for all drivers authenticated into that ELD for the current
day and the following 14 days.
List of Malfunctions and Diagnostics