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.
FSM-U300066: Control Module. Algorithm Based Failures. Signal Has Too Many Transitions / Events (2007-2012): Fault-Tracing: Verification
- Ignition off for 10 seconds and then on again.
Test drive the car as follows:
- Drive the vehicle at a speed in excess of 50 km/h and activate the adaptive cruise control.
- Increase and decrease the speed using the steering wheel buttons.
- If the adaptive cruise control works, the functions have restarted and the malfunction rectified.
Click the VCT2000 symbol in VIDA (Volvo scan tool) to read diagnostic trouble codes (DTCs).
Are other diagnostic trouble codes (DTCs) stored?
- YES
OKAY: Troubleshooting has been completed.
- NO
Refer to INFORMATION
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.