Electrical / J1939 Troubleshooting Tree

Systematic troubleshooting for electrical and J1939 network faults including CAN bus communication errors, battery voltage issues, ECM faults, and sensor circuit problems.

DieselVision™ improves diagnostic accuracy by verifying photo-derived data — upload scanner screens or connector photos to auto-populate fault codes and pin assignments.

Is the scan tool unable to communicate with the ECM?

Need a more detailed guided diagnosis?

AI Diagnostic Engine

Snap a photo of your scan tool screen and let Diesel Vision interpret the fault instantly — no manual code lookup required.

Try It

Video Demo Coming Soon

Watch how fast AI Diesel Tech interprets a fault code using Diesel Vision.