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 2023 OWNER’S MANUAL 
DIAGNOSTICS
All engine, PDM, EPDM and Tab diagnostic information can be 
found under DIAGNOSTICS on the main menu. Tap one of the four 
diagnostic options to pull up system diagnostics. 
Engine Diagnostics 
Shows the number of both Active and Stored faults and which fault 
number is currently being displayed. To advance to the next fault, 
touch NEXT. Touch PREVIOUS to go back to the previous fault. 
SPN — Suspect Parameter Number — fault code. If not translated 
into text by the display, see the engine manufacturer’s literature 
for the definition of the SPN number.
FMI — Failure Mode Indicator — fault code. The FMI is defined by 
SAE J1939. If not translated into text, see the SAE standard, or the 
engine manufacturer’s literature.
Description Field — Most common SPNs and FMIs have text for 
the description stored in the display. If there is no text, refer to the 
engine manufacturer or the SAE J1939 standard. NOTE: This field 
is only used with certain engine models.
Corrective Action — Tap GET FAULTS. This queries the engine(s) 
ECU for feedback on diagnostic codes activated and stored in the 
ECU for service needs.
PDM Diagnostics 
PDM Diagnostics displays faults for outputs, inputs and CAN 
communications for PDM modules. XT Series models have two 
PDMs. X Series models have three. To check all PDMs for faults, 
tap PDM 1, PDM 2 or PDM 3 on the PDM Diagnostics page. Faults 
on each PDM will be displayed on their respective pages. To reset 
existing faults, touch RESET FAULTS.
Faults are color coded as follows:
•  Red - Short Circuit or 
Out of Range
•  Orange - Open Circuit 
•  Yellow - Over-Current
•  Green - No Faults / 
Active / In Range