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.
GPS Reception
The GPS receiver receives signals from GPS satellites. The global positioning system module (GPS) (16/139) sends the signals onwards via the MOST network to:
- multimedia module (MMM) (16/108)
- phone module (PHM) (16/60)
- infotainment control module (ICM) (16/1.2).
The signal to the multimedia module (MMM) is used to determine the position of the car. The signal to the phone module (PHM) is used by Volvo On Call/Volvo On Call Plus to locate the car in the event of an emergency.
The signals to the infotainment control module (ICM) is a confirmation that the control module is awake.
When starting from cold, the system must be able to determine the position of the car within 120 seconds. For warm starting the position must be available within 40 seconds.
A cold start is when the system has had no power for a long period. A warm start is where the system has been off for a shorter time, when the car has been in a short-stay car park for example. This does not apply to locations without GPS reception, for example when the car is inside a garage.
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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