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.
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HOMESERVICE MANUALSHONDA2020CIVIC SPORT, 4D HATCHBACK, STANDARD TRANSREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMSCRUISE CONTROL SYSTEM - TESTING & TROUBLESHOOTINGSYMPTOM TROUBLESHOOTING INDEXADAPTIVE CRUISE CONTROL (ACC) SYMPTOM TROUBLESHOOTING INDEX (ADAPTIVE CRUISE CONTROL (ACC))
2020 Honda Civic Sport, 4D Hatchback, Standard Trans
Adaptive Cruise Control (ACC) Symptom Troubleshooting Index (Adaptive Cruise Control (ACC))
2020 Honda Civic Sport, 4D Hatchback, Standard TransSECTION Adaptive Cruise Control (ACC) Symptom Troubleshooting Index (Adaptive Cruise Control (ACC))
NOTE: The ACC system is cancelled when the VSA system is activated.
| Symptom | Diagnostic procedure | Also check for |
|---|---|---|
| Vehicle speed can be set, but there is no ACC indication on the MID | Do the gauge control module self-diagnostic function procedure . | |
| ACC OFF is displayed on the MID unexpectedly | Check the ACC system auto stop control history . | |
| Vehicle speed cannot be set when the SET switch is pressed between the 25 mph (40 km/h) and 90 mph (145 km/h) |
|
|
| Vehicle does not decelerate or accelerate accordingly when the SET or RES switch is pressed | Test the ACC combination switch . | An open in the wire |
| Set speed does not cancel when the brake pedal is pressed | Test the brake pedal position switch . | An open in the wire |
| Set speed does not cancel when the MAIN switch is turned off | Test the ACC combination switch . | An open in the wire |
| Set distance cannot be adjusted with the distance switch | Test the distance switch . | |
| Vehicle speed can be set, but vehicle decelerates | Check for DTCs in the PGM-FI system with the HDS . | Faulty ETCS |
| ACC activation indicator (on the MID) does not come on | Symptom troubleshooting . | |
| ACC activation indicator (on the MID) does not go off | Symptom troubleshooting . | |
| ACC indicator (on the MID) does not come on | Symptom troubleshooting . | |
| ACC indicator (on the MID) does not go off | Symptom troubleshooting . | |
| Senses a vehicle driving in another lane | Symptom troubleshooting . |
|
| Does not sense the vehicle driving ahead | Symptom troubleshooting . |
|
| Intermittently senses the vehicle driving ahead | Symptom troubleshooting . |
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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.