Fault tracing a vehicle in non-guided mode

This procedure describes how to fault trace a D2 or GGD protocol-based vehicle in non-guided mode. Non-guided fault tracing is applicable when you do not have any CSC in your currently active work list. The procedure covers descriptions of parameters, activations and the graphical display functionality.

Note

This procedure is only applicable for D2 and GGD protocol-based vehicles.

This procedure is based on a case where a customer's "Check engine" light is active and you need to fault trace the vehicle in VIDA. You have already been trying to perform a guided fault tracing on the vehicle but you did not find the fault.

Connect the vehicle and check for network faults

Start by connecting the vehicle to work with.

ð	The Diagnostics tab is opened by default as soon as the vehicle is connected and assigned its own tab.

Check if there is a icon next to the Network menu item in the left-hand menu panel, indicating that there is a network problem in the vehicle. If this icon is shown, continue by fault tracing the network.

Start fault tracing

Select Vehicle Communication in the left-hand menu panel to start the non-guided fault tracing.

ð	The Vehicle Communication page is opened. Here it is possible to fault trace the vehicle by reading parameters etc.

Select the ECM (Engine Control Module) in the vehicle graphic.

ð	The list of parameters below the vehicle graphic is populated.

Select parameters to use in the fault tracing by using the checkboxes.

ð	The selected parameters are now shown under the Selected Parameters tab on the right-hand side of the screen. The parameter values are read automatically.

Select the Information tab to view the parameter descriptions. Scroll the document to find the descriptions that are relevant for the parameters you have selected.

View graph

Return to the list of selected parameters by clicking the Selected Parameters tab. Click the Graphic Display button.

ð	A pop-up is opened containing a diagram that you can use to monitor the parameters graphically.

Select parameters to monitor by ticking their checkboxes and click the Start button.

ð	The values of the selected parameters are now presented graphically in the diagram.

You can zoom all parameters and individual parameters in the diagram. To zoom all parameters in the diagram, position the cursor within the diagram area and use the scroll wheel on your mouse. To zoom an individual parameter, position the cursor on appropriate axis and use the scroll wheel on your mouse.

Run activations

For certain functions and components it is beneficial to use activations to isolate the fault when fault tracing. Click the Activations tab in the middle panel and select an appropriate activation.

Note

This tab is only enabled if there are any possible activations available for the control module selected in the Control Module panel.

ð	The selected activation is shown in the right-hand panel.

Select the Information tab in the right-hand panel to view information about the activation. Scroll the document to find and read the descriptions of the activation you have selected.
Return to the selected activation by clicking the Possible Activations tab. Set the activation (e.g. to 100%) by clicking that row in the Possible Activations table and click the Start button to verify the function.

ð	Once the control module has accepted the command to activate the component, the status is updated in the table.

Click the Advanced tab in the middle panel.

ð	A list of diagnostic sequences is shown. The sequences that are available differ between vehicles but it could e.g. be tests and checks, calibrations and reset functions.

Click a diagnostic sequence and follow the instructions in the pop-up.

Erase DTCs and finish the fault tracing

After fault tracing and repair, the DTCs should be erased and read again to verify that the customer's complaint has been remedied. To do this, select Fault Tracing in the left-hand menu panel and select the Delivery tab. It is possible to erase DTCs in one control module only by selecting it in the graphic and clicking the Erase button. To erase all DTCs in all control modules, click the Erase All DTCs button.

ð	An instruction is shown in a pop-up.

Follow the instructions in the pop-up and click the Update button when everything is done.

ð	The DTC(s) are erased. After erasing DTCs, you are asked to start the vehicle twice before a new readout is performed.

The result after an erase and readout is shown in the graphic and DTC list. Use the Read All DTCs button if you want to perform a new vehicle readout.