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.
Circuit Description
Based on data from the laser radar sensor, the distance control ECU determines a vehicle to Follow and transmits the acceleration and deceleration signal for achieving the target distance. The distance control ECU sends the shift down request signal to the ECM, and sends the brake control request and alarm request signals through the ECM to the skid control ECU.
| DTC No. | DTC Detecting Condition | Trouble Area |
|---|---|---|
| P1617/63 | Distance control ECU malfunction |
|
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.