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Diagnostic programs provided by the power train component suppliers can still be used to diagnose.

The engine does not need to be running to view the ESC / BC codes.

Diagnostic fault codes will only be viewable on the Faults tab while the ignition key is in the run position.

Note these faults are only associated with modules communicating on the J1939 (CAN) Data link. The Faults tab provides a very comprehensive description of a diagnostic fault for the Body Controller / ESC including text description, probable cause, connector pin associated with the fault, and the module associated with the fault. The user can decode diagnostic fault codes directly by selecting the Faults tab. If fault codes are still active, they will repopulate the Faults tab. A window like the one shown below will appear.Ģ.Check the box next to each module that you wish to clear faults from.ģ.Click OK to clear the faults from the selected modules. To enter Diagnostic Mode, click the Diagnostic Mode icon in the toolbar.ġ.Click the Clear Faults icon in the toolbar.

When DLB is in Diagnostic Mode, it will display fault codes generated by most modules communicating on the J1939 (CAN) Data Link. When Diagnostic Mode is ON, the icon appears indented in the toolbar

This icon should show that the vehicle is connected.Ĥ.In the toolbar, click the Diagnostic Mode icon When diagnosing a vehicle using the Diamond Logic®Builder software, the first step is to connect the system to the vehicle:ġ.On the Select tab, select the vehicle to be diagnosed.Ģ.In the toolbar, click the Computer Link icon.ģ.Verify that the connection is established by checking the icon in the lower-right corner of the window. 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