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)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSSECURITY SYSTEM / KEYLESS ENTRY SYSTEM - TESTING & TROUBLESHOOTING
2018 Honda Ridgeline Black Edition
Security System / Keyless Entry System - Testing & Troubleshooting
2018 Honda Ridgeline Black EditionSECTION Security System / Keyless Entry System - Testing & Troubleshooting
- Symptom Troubleshooting
- Keyless/Power Door Locks/Security System Symptom Troubleshooting - Security alarm system will not arm (2017 2018 2019)
- Keyless/Power Door Locks/Security System Symptom Troubleshooting - Security alarm system will not arm (2020 2021 2022 2023 2024 2025)
- Keyless/Power Door Locks/Security System Symptom Troubleshooting - The horn does not sound and/or the headlights do not flash when the PANIC button on the remote is pressed
- Symptom Troubleshooting Index
- Keyless Access System Symptom Troubleshooting Index (2017 2018 2019)
- Keyless Access System Symptom Troubleshooting Index (2020 2021 2022 2023 2024 2025)
- Keyless/Power Door Locks/Security System Symptom Troubleshooting Index (2017 2018 2019)
- Keyless/Power Door Locks/Security System Symptom Troubleshooting Index (2020 2021 2022 2023 2024 2025)
- Description & Operation
- Keyless Access System Description
- Keyless Access System Description - Components
- Keyless Access System Description - System Diagram (2017 2018 2019 2020)
- Keyless Access System Description - System Diagram (2021 2022 2023 2024 2025)
- Keyless/Power Door Locks/Security System Description (2017 2018 2019 2020)
- Keyless/Power Door Locks/Security System Description (2021 2022 2023 2024 2025)
- Keyless/Power Door Locks/Security System Description - Components (2017 2018 2019 2020)
- Keyless/Power Door Locks/Security System Description - Components (2021 2022 2023 2024 2025)
- Keyless/Power Door Locks/Security System Description - System Diagram (2017 2018 2019 2020)
- Keyless/Power Door Locks/Security System Description - System Diagram (2021 2022 2023 2024 2025)
- Symptom Troubleshooting Index for Viewer
- All the doors will not lock and unlock (2017 2018 2019)
- All the doors will not lock and unlock (2020 2021 2022 2023 2024 2025)
- All the doors will not lock or unlock with driver's door key cylinder or door lock switch or keyless remote (2017 2018 2019)
- All the doors will not lock or unlock with driver's door key cylinder or door lock switch or keyless remote (2020 2021 2022 2023 2024 2025)
- Auto door unlock does not work (2017 2018 2019)
- Auto door unlock does not work (2020 2021 2022 2023 2024 2025)
- Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch (2017 2018 2019)
- Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch (2020 2021 2022 2023 2024 2025)
- Cannot select ON mode with keyless access, but can select ON mode with the keyless remote touching the engine start/stop switch (2017 2018 2019)
- Cannot select ON mode with keyless access, but can select ON mode with the keyless remote touching the engine start/stop switch (2020 2021 2022 2023 2024 2025)
- Cannot select ON mode with the keyless remote touching the engine start/stop switch, but can select ON mode with keyless access (2017 2018 2019)
- Cannot select ON mode with the keyless remote touching the engine start/stop switch, but can select ON mode with keyless access (2020 2021 2022 2023 2024 2025)
- Doors automatically relock 30 seconds after being unlocked with the remote even though a door has been opened (2017 2018 2019)
- Doors automatically relock 30 seconds after being unlocked with the remote even though a door has been opened (2020 2021 2022 2023 2024 2025)
- Driver's door will not lock or unlock (2017 2018 2019)
- Driver's door will not lock or unlock (2020 2021 2022 2023 2024 2025)
- Engine does not crank (power supply is normal) (2017 2018 2019)
- Engine does not crank (power supply is normal) (2020 2021 2022 2023 2024 2025)
- Engine start/stop switch does not work (2017 2018 2019)
- Engine start/stop switch does not work (2020 2021 2022 2023 2024 2025)
- Front passenger's doors will not lock or unlock (2017 2018 2019)
- Front passenger's doors will not lock or unlock (2020 2021 2022 2023 2024 2025)
- Immobilizer indicator does not go off or does not come on (2017 2018 2019)
- Immobilizer indicator does not go off or does not come on (2020 2021 2022 2023 2024 2025)
- Keyless access indicator does not go off or does not come on (2017 2018 2019)
- Keyless access indicator does not go off or does not come on (2020 2021 2022 2023 2024 2025)
- Left rear door will not lock or unlock (2017 2018 2019)
- Left rear door will not lock or unlock (2020 2021 2022 2023 2024 2025)
- Passenger doors will not unlock with the remote or key cylinder switch, but will unlock with the inside door unlock switch (2017 2018 2019)
- Passenger doors will not unlock with the remote or key cylinder switch, but will unlock with the inside door unlock switch (2020 2021 2022 2023 2024 2025)
- Right rear doors will not lock or unlock (2017 2018 2019)
- Right rear doors will not lock or unlock (2020 2021 2022 2023 2024 2025)
- Security alarm system will not arm (2017 2018 2019)
- Security alarm system will not arm (2020 2021 2022 2023 2024 2025)
- Tailgate will not lock or unlock (2020 2021 2022 2023 2024 2025)
- 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 (2017 2018 2019)
- 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 (2020 2021 2022 2023 2024 2025)
- The doors will not unlock or lock with the keyless remote, but will unlock or lock with the door outer handles (2017 2018 2019)
- The doors will not unlock or lock with the keyless remote, but will unlock or lock with the door outer handles (2020 2021 2022 2023 2024 2025)
- The engine starts, but stalls immediately (2017 2018 2019)
- The engine starts, but stalls immediately (2020 2021 2022 2023 2024 2025)
- The horn does not sound and/or the headlights do not flash when the PANIC button on the remote is pressed (2017 2018 2019)
- The horn does not sound and/or the headlights do not flash when the PANIC button on the remote is pressed (2020 2021 2022 2023 2024 2025)
- The key-in reminder does not sound (2017 2018 2019)
- The key-in reminder does not sound (2020 2021 2022 2023 2024 2025)
- The key-in reminder sounds in vehicle OFF (LOCK) mode when door is open (2017 2018 2019)
- The key-in reminder sounds in vehicle OFF (LOCK) mode when door is open (2020 2021 2022 2023 2024 2025)
- The mode changes between ACCESSORY and ON, but it does not change to OFF (LOCK) (2017 2018 2019)
- The mode changes between ACCESSORY and ON, but it does not change to OFF (LOCK) (2020 2021 2022 2023 2024 2025)
- The mode changes between ACCESSORY and ON, but it is difficult to change to OFF (LOCK) (2017 2018 2019)
- The mode changes between ACCESSORY and ON, but it is difficult to change to OFF (LOCK) (2020 2021 2022 2023 2024 2025)
- The security system sounds randomly while the doors are locked (2017 2018 2019)
- The security system sounds randomly while the doors are locked (2020 2021 2022 2023 2024 2025)
- Test
- Door Key Cylinder Switch Test
- Door Lock Actuator Test
- Door Lock Knob Switch Test
- HomeLink Remote Control System Test (2017 2018 2019 2020)
- HomeLink Remote Control System Test (2021 2022 2023 2024 2025)
- HomeLink Switch Test
- Hood Latch Switch Test
- Keyless Access LF Antenna Function Test
- Keyless Access System Status Log (2017 2018 2019)
- Keyless Access System Status Log (2020 2021 2022 2023 2024 2025)
- Park Pin Switch Test (2017 2018 2019)
- Input Test
- Keyless Access System (Keyless Access Control Unit, Electric Steering Lock, and TPMS Control Unit) Input Test (2017 2018 2019)
- Keyless Access System (Keyless Access Control Unit, Electric Steering Lock, and TPMS Control Unit) Input Test (2020 2021 2022 2023)
- Keyless Access System (Keyless Access Control Unit, Electric Steering Lock, and TPMS Control Unit) Input Test (2024 2025)
- Keyless/Power Door Locks/Security System (MICU, Door Multiplex Control Unit, and Front Passenger's Power Window Switch) Input Test (2017 2018 2019)
- Keyless/Power Door Locks/Security System (MICU, Door Multiplex Control Unit, and Front Passenger's Power Window Switch) Input Test (2020 2021 2022 2023 2024 2025)
- 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.