Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Reading Off Volvo On-Board Diagnostic (OBD) System: Notes
Information about faults and other information can be read off using the Volvo Scan Tool (ST) connected to the data link connector (DLC).
The Volvo Scan Tool (ST) communicates with the cruise control using a standard communications interface.
The data link connector (DLC) is located on the left of the center console under the dashboard.
The Volvo Scan Tool (ST) can be used to:
- Read and erase the diagnostic trouble codes (DTCs).
- Check input signals to the control module.
- Read out the last reason that the cruise control was disengaged.
Activating Volvo on-board diagnostic (OBD) system:
- Ignition ON
- normal battery voltage.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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