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.
Cruise Control System - Service, Testing And Troubleshooting
2023 Acura RDX BaseSECTION Cruise Control System - Service, Testing And Troubleshooting
- Symptom Troubleshooting Index
- Adaptive Cruise Control (ACC) Symptom Troubleshooting Index
- Collision Mitigation Braking System (CMBS) Symptom Troubleshooting Index (Collision Mitigation Braking System (CMBS)) (2019, 2020, 2021)
- Collision Mitigation Braking System (CMBS) Symptom Troubleshooting Index (Collision Mitigation Braking System (CMBS)) (2022, 2023)
- Lane Keeping Assist System (LKAS) Symptom Troubleshooting Index
- Circuit Diagram
- Adaptive Cruise Control (ACC) Circuit Diagram (2019, 2020, 2021)
- Adaptive Cruise Control (ACC) Circuit Diagram (2022, 2023)
- Collision Mitigation Braking System (CMBS) Circuit Diagram (2019, 2020, 2021)
- Collision Mitigation Braking System (CMBS) Circuit Diagram (2022, 2023)
- Lane Keeping Assist System (LKAS) Circuit Diagram (2019, 2020, 2021)
- Lane Keeping Assist System (LKAS) Circuit Diagram (2022, 2023)
- How to Information
- How to Troubleshoot the Adaptive Cruise Control (ACC) (2022, 2023)
- Before Troubleshooting
- System Indicator
- ACC Activation Indicator (Green)
- How to Read DTCs with the HDS
- 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
- How to Troubleshoot DTCs
- How to Troubleshoot the Lane Keeping Assist System (LKAS) (2022, 2023)
- Before Troubleshooting
- System Indicator
- LKAS Activation Indicator (Green)
- How to Read DTCs with the HDS
- Self-Diagnostic Function
- Millimeter Wave Radar
- Multipurpose Camera Unit
- Dirt or Dust Detective Function (CLEAN FRONT WINDSHIELD Indication)
- System Protect Function (High Temperature) (MULTIPURPOSE CAMERA HOT Indication)
- Multipurpose Camera Aiming Function
- CAN Communication
- How to Troubleshoot DTCs
- How to Troubleshoot the Adaptive Cruise Control (ACC) (2022, 2023)
- General Information
- Symptom Troubleshooting Index for Viewer
- ACC OFF Is Displayed On The Mid Unexpectedly
- ACC Indicator (On The MID) Does Not Come On
- ACC Indicator (On The MID) Does Not Go Off
- CMBS OFF Switch Does Not Turn On/Turn Off (CMBS Indicator Does Not Change) (Collision Mitigation Braking System (CMBS)) (2019, 2020, 2021)
- CMBS Does Not Turn On/Turn Off (Collision Mitigation Braking System (CMBS)) (2022, 2023)
- CMBS Indicator (On The MID) Does Not Come On (Collision Mitigation Braking System (CMBS)) (2019, 2020, 2021)
- CMBS Indicator (On The MID) Does Not Go Off (Collision Mitigation Braking System (CMBS)) (2019, 2020, 2021)
- Does Not Sense The Vehicle Driving Ahead
- Intermittently Senses The Vehicle Driving Ahead
- LKAS Indicator (On The Mid) Does Not Come On
- LKAS Indicator (On The Mid) Does Not Go Off
- Senses A Vehicle Driving In Another Lane
- Set Distance Cannot Be Adjusted With The Distance Switch
- Set Speed Does Not Cancel When The MAIN Switch Is Turned Off
- Set Speed Does Not Cancel When The Brake Pedal Is Pressed
- The CMBS Did Not Operate (Collision Mitigation Braking System (CMBS)) (2019, 2020, 2021)
- The CMBS Did Not Operate (Collision Mitigation Braking System (CMBS)) (2022, 2023)
- The CMBS Operated Without Danger Of Collision (Collision Mitigation Braking System (CMBS)) (2019, 2020, 2021)
- The CMBS Operated Without Danger Of Collision (Collision Mitigation Braking System (CMBS)) (2022, 2023)
- The CMBS Operates Frequently (Collision Mitigation Braking System (CMBS)) (2019, 2020, 2021)
- The CMBS Operates Frequently (Collision Mitigation Braking System (CMBS)) (2022, 2023)
- The MID Does Not Indicate When The CMBS OFF Switch Is Operated (Collision Mitigation Braking System (CMBS)) (2019, 2020, 2021)
- The MID Does Not Indicate When The Safety Support Switch Is Operated (Collision Mitigation Braking System (CMBS)) (2022, 2023)
- The MID Does Not Indicate With The CMBS Operating (Collision Mitigation Braking System (CMBS)) (2019, 2020, 2021)
- The MID Does Not Indicate With The CMBS Operating (Collision Mitigation Braking System (CMBS)) (2022, 2023)
- The Buzzer Does Not Sound When The CMBS OFF Switch Is Operated (Collision Mitigation Braking System (CMBS)) (2019, 2020, 2021)
- The Buzzer Does Not Sound When The Safety Support Switch Is Operated (Collision Mitigation Braking System (CMBS)) (2022, 2023)
- The Buzzer Does Not Sound (Collision Mitigation Braking System (CMBS)) (2019, 2020, 2021)
- The Buzzer Does Not Sound (Collision Mitigation Braking System (CMBS)) (2022, 2023)
- Vehicle Does Not Decelerate Or Accelerate Accordingly When The SET- or RES+ Button Is Pressed
- Vehicle Speed Can Be Set, But There Is No ACC Indication On The MID
- Vehicle Speed Can Be Set, But Vehicle Decelerates
- Vehicle Speed Cannot Be Set When The SET Button Is Pressed Between 25 MPH (40 KM/H) And 90 MPH (145 KM/H)
- Troubleshooting
- Adaptive Cruise Control (ACC) Symptom Troubleshooting - ACC indicator (on the MID) does not come on
- 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
- Lane Keeping Assist System (LKAS) Symptom Troubleshooting - LKAS indicator (on the MID) does not come on
- Removal and Installation
- Component Location Index
- Construction and Function
- Adaptive Cruise Control (ACC) System Description (2019 2020 2021)
- Adaptive Cruise Control (ACC) System Description (2022 2023)
- Adaptive Cruise Control (ACC) System Description - System Diagram
- Collision Mitigation Braking System (CMBS) Description
- Collision Mitigation Braking System (CMBS) Description - System Diagram
- Lane Keeping Assist System (LKAS) System Description
- Lane Keeping Assist System (LKAS) System Description - System Diagram
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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.