The JDR100 CAN bus reader from Governors America displays live engine parameters including RPM, oil pressure, coolant temperature, battery voltage, engine run hours, and fuel level as well as standard J1939 diagnostic trouble codes. The universal reader displays active and stored codes for up to 10 ECUs and is fully operational through three buttons. Suitable for various engine manufacturers and sizes, the rugged JDR100 installs easily, measuring 2.75 x 2.75 x 2.127 in (70 x 70 x 54 mm), and features a built-in CAN bus termination resistor and no configuration software. Internal memory maintains engine run hours, and a three-line LCD display shows fault codes and operating functions. The controller’s design offers a low power draw of 0.25 A at 12 V, allowing it to be connected to the battery or the ignition for power. Operating temperature range is -40 to +185°F (-40 to +85°C).