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.
DTC C1650-08: CAN Signal Error ACC: General Description
The Vehicle Stability Management (VSM) is a safety function which prevents vehicle to crash or reduce damage of crashing by The ESC controlling braking force with Forward Collision-Avoidance Assist (FCA) system.
FCA makes a decision if car is about to crash by measuring the distance against the car next ahead. The ESC stands by braking when collision hazard against the car next ahead is detected.
If collision is expected, The ESC brakes the vehicle even thought the driver doesn't press brake pedal by actuating motor to reduce damage of crash.
The ABS/ESP exchanges CAN messages with ECM/PCM, TCM, FCA for normal operation of the VSM.
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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.