General Diagnostic FAQ’s (G4142441)

Can I still user Pathfinder?

The software on the Pathfinder equipment is no longer being updated and it is no longer a JLR approved device. Pathfinder is not to be used unless explicitly instructed to by Local Technical Support.

Which JLR Vehicles and Model Years does TOPIx Cloud Diagnostics cover?

TOPIx Cloud covers for 17MY for Discovery, Range Rover and Range Rover Sport, and 18MY onwards all vehicles excluding XJ . Use SDD for all other vehicles.

• Refer to: 6.3 Integrated diagnostics
  (Standardised Navigation/6. Vehicle diagnostics).
• Refer to: TOPIx Cloud Diagnostics
  (TOPIx User Guide/Diagnostics).

Must TOPIx Workflow or Cloud be active while a technician is doing the repair?

TOPIx workflow can be paused at any time and resume the workflow from the fault breakdown summary screen. The Diagnostic Agent must be removed while the repair is being performed. The Diagnostic Device Agent must connect again to program the module.

When logging into the Diagnostic Device Agent how do I know if my Vehicle Identification Number (VIN) is supported by TOPIx Cloud or if my vehicle predates TOPIx Cloud and is only supported with SDD?

The Diagnostic Device Agent reads the VIN, if a non-supported vehicle has been entered, a Red Cross will appear next to ‘Connecting to Vehicle’ and an error will displayed at the bottom of the login popup, informing the user the vehicle is not supported.

I am unable to add keys or program a new security module (Instrument Panel Cluster Control Module (IPC), Powertrain Control Module (PCM), Body Control Module (BCM), Gateway Module A (GWM), Remote Function Actuator (RFA))

You must be an accredited user to access security related diagnostics.

• Refer to: 1.7 Grant access to security-related RMI
  (Standardised Navigation/1. User authentication, authorisation and administration).
• Refer to: TOPIx Cloud Diagnostics
  (TOPIx User Guide/Diagnostics).

What is Secure Diagnostics and how does it work?

UNECE regulations UN R155 and UN R156 are key international standards introduced to address cybersecurity and software updates in vehicles.

Secure Diagnostics, introduced in August 2025 with the 26MY Defender and Discovery vehicles, enhances the protection of onboard diagnostic systems. It does this by restricting diagnostic communication with the vehicle’s networks until the system is unlocked by an authorized tester.

The unlocking process is fully integrated into all TOPIx applications. Users can easily check the vehicle’s lock status through a padlock icon displayed in the top banner of the TOPIx interface, next to the ‘Ready’ status.

PADLOCK ICON INDICATORS

Green Padlock: the vehicle is either not equipped with Secure Diagnostics or the module is already unlocked.

Red Padlock: the vehicle is Secure Diagnostics enabled and the module is currently locked. It will automatically unlock when a supported diagnostic application is launched.

How do I report an issue with diagnostics?

Confirm that this concern is not caused by hardware (Universal Serial Bus (USB) connections on the PC or cables).

Also read through these FAQ's and the diagnostic support information available in TOPIx:

• Refer to: 6.3 Integrated diagnostics
  (Standardised Navigation/6. Vehicle diagnostics).
• Refer to: Download and Installation (TOPIx Cloud Diagnostics).
• Refer to: TOPIx Cloud Diagnostics
  (TOPIx User Guide/Diagnostics).

If you still do not have an answer to your question, raise a support case using the link below and include the following details where available; TOPIx Technical Support

• VIN
• Model/Model Year
• Diagnostic platform used along with the version
• Diagnostic hardware detail and OS detail
• Name of application they are having trouble with
• Detail of the error/concern and has supporting information been provided?
• If applicable, SDD monitoring files must be attached
• Contact information

For further support:

(Standardised Navigation/9. Repair assistance technical support).

Can I compare data collected in a data Network Integrity Test (NIT) with historic NIT information?

This TOPIx feature allows NIT collected data to be viewed and compared with historic NIT information. This is available from the Diagnostics tab, in the right-hand pane labelled Applications And Trouble Shooting, select History.

(TOPIx Cloud Diagnostics/Overview).

I cannot get SDD to work.

Are you able to select the application in SDD to allow you program this module? If you are able to select the programing routine does the application display an error?

If you have programing concern when using a specific SDD application, raise a support case using the link below and include the following details where available; TOPIx Technical Support

SDD has the ability to record debugging files, these are known as Controller Area Network (CAN) Link monitor and SDD debug monitor. Provide these files to allow us to investigate.

• VIN
• Model/Model Year
• Diagnostic platform used along with the version
• Diagnostic hardware detail and OS detail
• Name of application you are having trouble with
• Detail of the error/concern and has supporting information been provided?
• If applicable, SDD monitoring files must be attached
• Contact information

How do I extract SDD session files for review?

1. Put a USB flash drive into a USB port on the SDD machine
2. Navigate to the SDD VIN screen
3. Select SESSIONS from the top right of the screen
4. Select the applicable VIN from the AVAILABLE SESSIONS box
5. Select EXPORT from the top left of the screen
6. Select the applicable Drive, for example '(D)'
7. Select the OVERWRITE'
8. Select SESSIONS FOR CURRENT VEHICLE icon
9. Select START EXPORT, Session files will transfer to the USB flash drive
10. Remove the USB flash drive from the USB port
11. Attach the session file zip to the e-mail.

How do I record and attach SDD monitoring files?

1. Navigate to the application you are attempting to complete
2. Select the Quick launch menu
3. Select ‘Start SDD monitoring’
4. Run the application you are attempting to complete
5. when the application has finished select Stop SDD monitoring
6. Select the PC location of where you would like the files to be saved
7. Attach the zip folder to the e-mail

I am unable to download InControl© Touch and calibration files

Check that your JLR approved diagnostic equipment is up to date, showing the correct Firewall and Antivirus Configuration. For more details on configuration of your diagnostic equipment:

• Refer to: 6.3 Integrated diagnostics
  (Standardised Navigation/6. Vehicle diagnostics).
• Refer to: TOPIx Cloud Diagnostics
  (TOPIx User Guide/Diagnostics).

How do I download SDD?

You need an active programing subscription from TOPIx to use the software. Purchase a Programing only or Programing, Documents and Workflow Subscription

1. Select SDD Manual Software Download from the TOPIx Links Page.
2. This will start a download of the latest software package to the Desktop for example, 'SDD_167.00.001_FULL.exe'. Note: the latest software package version may be different to the example given here.
3. Run the download and allow the software to install
4. The laptop is ready to use SDD
5. When you have logged into SDD select Settings /Dealer Information.
6. From the Dealer list select Independent Operator, for the Town select Independent, select your Country and then Submit.
7. From Settings, select the Network Options tab and then select the 'Active' button

(Standardised Navigation/6. Vehicle diagnostics).

How do I uninstall SDD?

1. Open the Windows start menu. Select the Uninstall SDD application
2. Select SDD Manual Software Download from the TOPIx Links Page.
3. Run the latest software package, for example, 'SDD_167.00.001_FULL.exe'. Note: the latest software package version may be different to the example given here.
4. Load all of the patches to take the machine back up to the latest level.
5. Test the operation of the Vehicle Communication Interface (VCI).

I have the JLR approved Hardware / Software - how do I set it up?

For instructions on how to set up hardware for TOPIx Cloud Diagnostics select the links below;

• Refer to: How to Set-up the Panasonic (out of the box)
  (TOPIx Cloud Diagnostics/Download and Installation).
• Refer to: Download and Installing JLR Software
  (TOPIx Cloud Diagnostics/Download and Installation).
• Refer to: How to load SDD on to a Panasonic FZ55 MK1 and MK3
  (TOPIx Cloud Diagnostics/Download and Installation).
• Refer to: Download and Installing JLR Software
  (TOPIx Cloud Diagnostics/Download and Installation).
• Refer to: Download and Installation (TOPIx Cloud Diagnostics).
• Refer to: TOPIx Cloud Diagnostics
  (TOPIx User Guide/Diagnostics).

I am unable to start a Diagnostic Device Agent session; the connection manager stops on ‘detecting device agent’ - Firewall check.

Check the Firewall setting for Diagnostic Device Agent:

1. Open the Microsoft Windows Control Panel and select either; .
   • System and Security Select ‘Allow an App through windows firewall’, or
   • Windows Defender Firewall select 'Allow an app or feature through Windows Defender Firewall'.
2. Scroll down the list until you see VCI Manager. Make sure that the Public and Private options are selected for VCI manager.
3. Scroll down the list and make sure that the Public and Private options are selected for each version of Diagnostic Device Agent.
4. Select OK when complete.

I am unable to start a Diagnostic Device Agent session; the connection manager stops on ‘detecting device agent’ - TLS Settings check.

Check TLS settings:

1. Using Windows Search, look for Internet Options. This will open a pop-up box.
2. Select the Advanced tab.
3. scroll down the list of options until you find the TLS settings TLS 1.0, TLS 1.1, TLS 1.2. Make sure that all the TLS settings are selected.

I am unable to start a Diagnostic Device Agent session; the VCI Manager does not open correctly - VCI Manager check.

If the VCI Manager does not open correctly reinstall the drivers:

1. Open the Microsoft Windows Control Panel, and select Uninstall a Program.
2. Scroll down the list, find and select BOSCH VCI Software (JLR), and then select Uninstall.
3. Follow the on-screen instructions to uninstall the software.
4. Reinstall the drivers; navigate to the TOPIx Links Page and select TOPIx Cloud VCI Drivers.
5. Follow on screen instructions to complete the installation.
6. Check that the VCI Manager now opens correctly.

I am unable to start a Diagnostic Device Agent session; the VCI Manager does not open correctly - Disable the VCI Wireless Connection.

1. Open the JLR VCI Manager.
2. Connect your VCI to the laptop using the USB cable
3. Select the connected VCI (shown in the middle of the VCI manager).
4. Select the Network Setup Tab
5. Make sure the Enable Wireless Interface option is un-checked, and select Apply.
6. Select the VCI Explore tab
7. Select Disconnect then close the VCI Manager.
8. Start the DDA application, and check that you are able to login and connect to a vehicle.

I am unable to start a Diagnostic Device Agent (DDA) session and the connection manager stops on Reading VIN or Connecting to vehicle.

Make sure that the basic vehicle checks below are completed before attempting to start a session again:

1. Make sure that there are no devices wired into the vehicles network, this includes devices connected to the diagnostic connector
2. Visually inspect the diagnostic connector:  make sure that the wires within the connector are not damaged, bent open or backing out
3. Check the wire colors in the diagnostic connector to make sure they are in the correct location.
4. Check the wiring between the diagnostic connector and the BCM / GWM, make sure that there are no concerns
5. Check the voltage on Pin 8 of the diagnostic connector, this must be live, (around 7 volts) when the Diagnostics over Internet Protocol (DoIP) VCI is connected
6. Disconnect the 2-pin green connector from the BCM, wait for 2 minutes then reconnect. Check if communications can now be established with the vehicle.

I have tried all the suggestions in the FAQ's but I am still unable to start a session on the vehicle, what do I do now?

If you are still unable to start a session on the vehicle, submit a support request, and attach the most recent application logs by completing the actions below:

1. From the cloud diagnostics toolbox menu select Logging Level. Select Trace and then close the menu.
2. Attempt to start a TOPIx cloud session.
3. Open the cloud diagnostics toolbox menu again, and select Capture Logs.
4. Navigate to C:\Users\Public\.device_agent\captured_logs.
5. Copy the most recent app logs file and attach it to the support request.

JLR Support Team

TOPIx Technical Support

When connecting the Inline Diagnostic Unit 2 (IDU2) the diagnostic device displays a red and green light.

The IDU2 communication device may not be recognized by the operating system upon connection through USB. To check status of the device, follow the process below;

• Connect the IDU2 device through a USB port on the diagnostic computer
• If the IDU2 device displays a faint red light, no further action is required
• If the IDU2 device displays a red and green light, follow the below steps
  • Log into the TOPIx Home Page
  • Click on TOPIx Links Page on the bottom left corner of the page
  • Select IDU Firmware Update v1 or later to begin the download
  • When the file is downloaded, open the file to install