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JDR – J1939 Diagnostic Readers
GAC’s JDR series of J1939 data readers, are low-cost universal devices that allow users to read Diagnostic Trouble Codes (DTC’s).  More advanced models allow users to monitor standard J1939 engine parameters, and or monitor and control Tier-IV diesel particulate regeneration function.  The JDR devices are designed for Electronic Engines (ECMs) and devices equipped with J1939 compatible Electronic Control Units (ECU).  

  • Universal J1939 Live Engine Parameter and Diagnostic Trouble Code Reader

  • Wide Temperature Range (-40˚ to +185˚F, -40˚ to +85˚C)

  • Built in CAN bus Termination Resistor

  • Self Contained, No Configuration Software Required

  • IP67 Sealed Case, Non-Fogging Display

  • Fits in 2” (51mm) Round Standard Panel Opening

  • J1939 Text Translation

  • JDR100’s Display RPM, Oil Pressure, Coolant Temperature, Fuel Level, Battery Voltage, and Engine Hours

  • Tier IV Diesel Particulate Filter Support (IV models only)

Selection Chart

ProductSupported Modes
JDR050·   J1939 DTCs
JDR050IV·   J1939 DTCs
·   Tier IV DPF Support
JDR100·   J1939 DTCs
·   Six Live Engine Parameters
JDR100IV·   J1939 DTCs
·   Seven Live Engine Parameters
·   Tier IV DPF Support