Make sure indicator lights are not simply burned out.Ĭheck References – Check all relevant service information including circuit diagrams and diagnostic charts. Are any wires loose or corroded?Īre there damaged connectors or pins? Are all components installed and installed correctly? Check to make sure the vehicle batteries are at 75% state of charge or higher. Perform Preliminary Checks – Perform a thorough visual inspection. Gather Information–What happened and when? Under what conditions? When did the symptoms begin? What else occurred at the time?Ĭheck Diagnostic Trouble Codes – Do the logged codes correlate to the symptoms and probable causes? Were the codes logged repeatedly?

Is the complaint due to misunderstood, customer-selected, programmed parameters?

Verify the Problem – Operate the complete system and list all symptoms. Before proceeding with diagnosing and troubleshooting, there are several important steps: The Diamond Logic® Builder software can be used to aid in diagnosing and troubleshooting electrical / electronic system problems.

How to Install Navistar Diamond Logic Builder (DLB) Software Navistar Diamond Logic Builder (DLB) Free Download