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 & TROUBLESHOOTING
2020 Honda Civic Sport, 4D Hatchback, Standard Trans
Cruise Control System - Testing & Troubleshooting
2020 Honda Civic Sport, 4D Hatchback, Standard TransSECTION Cruise Control System - Testing & Troubleshooting
- Symptom Troubleshooting Index
- Adaptive Cruise Control (ACC) Symptom Troubleshooting Index (Adaptive Cruise Control (ACC))
- Collision Mitigation Braking System (CMBS) Symptom Troubleshooting Index (Collision Mitigation Braking System (CMBS))
- Cruise Control Symptom Troubleshooting Index (Cruise Control)
- Lane Keeping Assist System (LKAS) Symptom Troubleshooting Index (Lane Keeping Assist System (LKAS))
- Component Location Index
- Adaptive Cruise Control (ACC) Component Location Index
- Collision Mitigation Braking System (CMBS) Component Location Index
- Cruise Control Component Location Index
- Lane Keeping Assist System (LKAS) Component Location Index (2019 2020 2021)
- Lane Keeping Assist System (LKAS) Component Location Index (2/4-door) (2016 2017 2018)
- Lane Keeping Assist System (LKAS) Component Location Index (5-door) (2017 2018)
- Input Test
- General Information
- How to Information
- How to Troubleshoot the Adaptive Cruise Control (ACC)
- ACC Indicator (Amber)
- Multi-Information Display (MID) Indication
- Self-Diagnostic Function
- Millimeter Wave Radar
- Dirt or dust detective function (Clean Millimeter Wave Radar Indication)
- Millimeter Wave Radar Aiming
- Multipurpose Camera Unit
- Multipurpose Camera Aiming Function
- CAN Communication
- Intermittent Failures
- How to Troubleshoot DTCs
- How to Retrieve DTCs
- How to Clear DTCs
- How to Troubleshoot the Adaptive Cruise Control (ACC)
- Symptom Troubleshooting
- Adaptive Cruise Control (ACC) Symptom Troubleshooting - ACC activation indicator (on the MID) does not come on
- Adaptive Cruise Control (ACC) Symptom Troubleshooting - ACC activation indicator (on the MID) does not go off
- Adaptive Cruise Control (ACC) Symptom Troubleshooting - ACC indicator (on the MID) does not come on
- Adaptive Cruise Control (ACC) Symptom Troubleshooting - ACC indicator (on the MID) does not go off
- Adaptive Cruise Control (ACC) Symptom Troubleshooting - ACC indicator (on the MID) does not go off (2/4-door) (2019 2020 2021)
- Adaptive Cruise Control (ACC) Symptom Troubleshooting - Does not sense the vehicle driving ahead
- Adaptive Cruise Control (ACC) Symptom Troubleshooting - Intermittently senses the vehicle driving ahead
- Adaptive Cruise Control (ACC) Symptom Troubleshooting - Senses a vehicle driving in another lane
- Collision Mitigation Braking System (CMBS) Symptom Troubleshooting - CMBS indicator (on the MID) does not go off
- Lane Keeping Assist System (LKAS) Symptom Troubleshooting - LKAS activation indicator (on the MID) does not come on
- Lane Keeping Assist System (LKAS) Symptom Troubleshooting - LKAS activation indicator (on the MID) does not go off
- Lane Keeping Assist System (LKAS) Symptom Troubleshooting - LKAS indicator (on the MID) does not come on
- Lane Keeping Assist System (LKAS) Symptom Troubleshooting - LKAS indicator (on the MID) does not go off (2016 2017 2018)
- Lane Keeping Assist System (LKAS) Symptom Troubleshooting - LKAS indicator (on the MID) does not go off (2/4-door) (2019 2020 2021)
- Description & Operation
- Adaptive Cruise Control (ACC) System Description - Control/Function
- Adaptive Cruise Control (ACC) System Description - Overview (2016 2017 2018 2019)
- Adaptive Cruise Control (ACC) System Description - Overview (2019 2020 2021)
- Adaptive Cruise Control (ACC) System Description - System Diagram (2019 2020 2021)
- Adaptive Cruise Control (ACC) System Description - System Diagram (2/4-door) (2016 2017 2018 2019)
- Adaptive Cruise Control (ACC) System Description - System Diagram (5-door) (2017 2018 2019)
- Collision Mitigation Braking System (CMBS) Description - Overview (2019 2020 2021)
- Collision Mitigation Braking System (CMBS) Description - Overview (2/4-door) (2016 2017 2018 2019)
- Collision Mitigation Braking System (CMBS) Description - Overview (5-door) (2017 2018 2019)
- Collision Mitigation Braking System (CMBS) Description - System Diagram (2019 2020 2021)
- Collision Mitigation Braking System (CMBS) Description - System Diagram (2/4-door) (2016 2017 2018 2019)
- Collision Mitigation Braking System (CMBS) Description - System Diagram (5-door) (2017 2018 2019)
- Cruise Control System Description - Overview
- Cruise Control System Description - System Diagram
- Lane Keeping Assist System (LKAS) Description - Overview
- Lane Keeping Assist System (LKAS) Description - System Diagram (2019 2020 2021)
- Lane Keeping Assist System (LKAS) Description - System Diagram (2/4-door) (2016 2017 2018 2019)
- Lane Keeping Assist System (LKAS) Description - System Diagram (5-door) (2017 2018 2019)
- Symptom Troubleshooting Index for Viewer
- ACC OFF is displayed on the MID unexpectedly (Adaptive Cruise Control (ACC))
- ACC activation indicator (on the MID) does not come on (Adaptive Cruise Control (ACC))
- ACC activation indicator (on the MID) does not go off (Adaptive Cruise Control (ACC))
- ACC indicator (on the MID) does not come on (Adaptive Cruise Control (ACC))
- ACC indicator (on the MID) does not go off (Adaptive Cruise Control (ACC))
- CMBS OFF switch does not turn On/turn Off (CMBS indicator does not change) (Collision Mitigation Braking System (CMBS))
- CMBS indicator (on the MID) does not go off (Collision Mitigation Braking System (CMBS))
- CMBS indicator does not come on (Collision Mitigation Braking System (CMBS))
- Cruise control can be set, but the cruise control indicator does not come on (Cruise Control)
- Cruise control can be set, but the cruise main indicator does not come on (Cruise Control)
- Cruise control cannot be set (Cruise Control)
- Does not sense the vehicle driving ahead (Adaptive Cruise Control (ACC))
- Intermittently senses the vehicle driving ahead (Adaptive Cruise Control (ACC))
- LKAS activation indicator (on the MID) does not come on (Lane Keeping Assist System (LKAS))
- LKAS activation indicator (on the MID) does not go off (Lane Keeping Assist System (LKAS))
- LKAS indicator (on the MID) does not come on (Lane Keeping Assist System (LKAS))
- LKAS indicator (on the MID) does not go off (Lane Keeping Assist System (LKAS))
- Senses a vehicle driving in another lane (Adaptive Cruise Control (ACC))
- Set distance cannot be adjusted with the distance switch (Adaptive Cruise Control (ACC))
- Set speed does not cancel (engine RPM stays high) when the clutch pedal is pressed for more than five seconds (M/T) (Cruise Control)
- Set speed does not cancel when the CANCEL button is pressed (Cruise Control)
- Set speed does not cancel when the CRUISE button is pressed (Cruise Control)
- Set speed does not cancel when the MAIN switch is turned off (Adaptive Cruise Control (ACC))
- Set speed does not cancel when the brake pedal is pressed (Adaptive Cruise Control (ACC))
- Set speed does not cancel when the brake pedal is pressed (Cruise Control)
- Set speed does not resume when the RES+ button is pressed (with the CRUISE button pressed on, and set speed temporarily canceled by pressing the brake pedal) (Cruise Control)
- The CMBS did not operate (Collision Mitigation Braking System (CMBS))
- The CMBS operated without danger of collision (Collision Mitigation Braking System (CMBS))
- The CMBS operates frequently (Collision Mitigation Braking System (CMBS))
- The MID does not indicate when the CMBS OFF switch is operated (Collision Mitigation Braking System (CMBS))
- The buzzer does not sound when the CMBS OFF switch is operated (Collision Mitigation Braking System (CMBS))
- The buzzer does not sound (Collision Mitigation Braking System (CMBS))
- Though CMBS operates, the information is not displayed on the MID (Collision Mitigation Braking System (CMBS))
- Vehicle does not accelerate accordingly when the RES+ button is pressed (Cruise Control)
- Vehicle does not decelerate or accelerate accordingly when the SET or RES switch is pressed (Adaptive Cruise Control (ACC))
- Vehicle speed can be set, but there is no ACC indication on the MID (Adaptive Cruise Control (ACC))
- Vehicle speed can be set, but vehicle decelerates (Adaptive Cruise Control (ACC))
- Vehicle speed cannot be set when the SET switch is pressed between the 25 mph (40 km/h) and 90 mph (145 km/h) (Adaptive Cruise Control (ACC))
- Circuit Diagrams
- Adaptive Cruise Control (ACC) Circuit Diagram (2/4-door) (2016 2017 2018)
- Adaptive Cruise Control (ACC) Circuit Diagram (2/4-door) (2019 2020 2021)
- Adaptive Cruise Control (ACC) Circuit Diagram (4-door, Japan Production) (2018)
- Adaptive Cruise Control (ACC) Circuit Diagram (5-door) (2017 2018 2019)
- Adaptive Cruise Control (ACC) Circuit Diagram (5-door) (2020 2021)
- Collision Mitigation Braking System (CMBS) Circuit Diagram (2/4-door) (2016 2017 2018)
- Collision Mitigation Braking System (CMBS) Circuit Diagram (2/4-door) (2019 2020 2021)
- Collision Mitigation Braking System (CMBS) Circuit Diagram (4-door, Japan Production) (2018)
- Collision Mitigation Braking System (CMBS) Circuit Diagram (5-door) (2017 2018 2019)
- Collision Mitigation Braking System (CMBS) Circuit Diagram (5-door) (2020 2021)
- Cruise Control Circuit Diagram (2017 2018 2019 2020 2021)
- Cruise Control Circuit Diagram (2/4-door, Except Si) (2016 2017 2018)
- Cruise Control Circuit Diagram (4-door, Japan Production) (2018)
- Cruise Control Circuit Diagram (Type-R/Si) (2017 2018 2019 2020 2021)
- Lane Keeping Assist System (LKAS) Circuit Diagram (2016 2017 2018)
- Lane Keeping Assist System (LKAS) Circuit Diagram (2/4-door) (2019 2020 2021)
- Lane Keeping Assist System (LKAS) Circuit Diagram (4-door, Japan Production) (2018)
- Lane Keeping Assist System (LKAS) Circuit Diagram (5-door) (2017 2018 2019)
- Lane Keeping Assist System (LKAS) Circuit Diagram (5-door) (2020 2021)
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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.