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 MANUALSHONDA2018RIDGELINE BLACK EDITIONREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSKEYLESS ACCESS SYSTEM - TESTING & TROUBLESHOOTING
2018 Honda Ridgeline Black Edition
Keyless Access System - Testing & Troubleshooting
2018 Honda Ridgeline Black EditionSECTION Keyless Access System - Testing & Troubleshooting
- Connector View
- HomeLink Unit Connector for Inputs and Outputs (2017 2018 2019 2020)
- HomeLink Unit Connector for Inputs and Outputs (2021 2022 2023 2024 2025)
- Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2017 2018 2019)
- Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2020 2021 2022 2023)
- Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2024 2025)
- Check
- Service Procedure
- General Information
- Circuit Diagram
- HomeLink Remote Control System Circuit Diagram (2017 2018 2019 2020)
- HomeLink Remote Control System Circuit Diagram (2021 2022 2023 2024 2025)
- Keyless Access System Circuit Diagram (2017 2018)
- Keyless Access System Circuit Diagram (2019)
- Keyless Access System Circuit Diagram (2020)
- Keyless Access System Circuit Diagram (2021 2022 2023)
- Keyless Access System Circuit Diagram (2024 2025)
- Keyless/Power Door Locks/Security System Circuit Diagram (2017 2018)
- Keyless/Power Door Locks/Security System Circuit Diagram (2019)
- Keyless/Power Door Locks/Security System Circuit Diagram (2020)
- Keyless/Power Door Locks/Security System Circuit Diagram (2021 2022 2023)
- Keyless/Power Door Locks/Security System Circuit Diagram (2024 2025)
- Component Location Index
- HomeLink Remote Control System Component Location Index (2017 2018 2019 2020)
- HomeLink Remote Control System Component Location Index (2021 2022 2023 2024 2025)
- Keyless Access System Component Location Index (2017 2018 2019)
- Keyless Access System Component Location Index (9-Speed A/T) (2020 2021 2022 2023 2024 2025)
- Keyless/Power Door Locks/Security System Component Location Index (2017 2018 2019)
- Keyless/Power Door Locks/Security System Component Location Index (9-Speed A/T) (2020 2021 2022 2023 2024 2025)
- Symptom Troubleshooting
- Keyless Access System Symptom Troubleshooting - All the doors will not lock and unlock
- Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch (2017 2018 2019)
- Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch (2020 2021 2022 2023 2024 2025)
- Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access, but can select ON mode with the keyless remote touching the engine start/stop switch
- Keyless Access System Symptom Troubleshooting - Immobilizer indicator does not go off or does not come on
- Keyless Access System Symptom Troubleshooting - Keyless access indicator does not go off or does not come on
- Keyless Access System Symptom Troubleshooting - The doors will not unlock or lock with the door outer handle touch sensor or lock switch, but will unlock or lock with the keyless remote
- Keyless Access System Symptom Troubleshooting - The doors will not unlock or lock with the keyless remote, but will unlock or lock with the door outer handles
- Keyless Access System Symptom Troubleshooting - The engine starts but stalls immediately
- Keyless Access System Symptom Troubleshooting - The key-in reminder does not sound
- Keyless Access System Symptom Troubleshooting - The key-in reminder sounds in vehicle OFF (LOCK) mode when door is open
- Keyless/Power Door Locks/Security System Symptom Troubleshooting - AUTO DOOR UNLOCK does not work (2017 2018 2019)
- Keyless/Power Door Locks/Security System Symptom Troubleshooting - AUTO DOOR UNLOCK does not work (2020 2021 2022 2023 2024 2025)
- Keyless/Power Door Locks/Security System Symptom Troubleshooting - Doors automatically relock 30 seconds after being unlocked with the remote even though a door has been opened
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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.