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.
Keyless Access LF Antenna Function Test
- Before testing, check for DTCs. If any DTCs are indicated, troubleshoot the indicated DTCs first.
- Some models have the rear outer handle touch sensor. Perform the troubleshooting flow where applicable.
1. Connect the HDS to the data link connector (DLC) - Refer to: How to Troubleshoot the Body Electrical (2017 2018 2019 2020), or How to Troubleshoot the Body Electrical (2016), or How to Troubleshoot the Body Electrical (2014 2015)
2. Turn the vehicle to the ON mode.
3. Select KEYLESS ACCESS CONTROL UNIT from the ONE-PUSH START system select menu with the HDS.
4. Select the SELF CHECK and if any malfunction is found, troubleshoot it first.
5. Select the FUNCTIONAL TESTS, and do the antenna driving test by checking the transmitting areas (A) between the LF antenna and the keyless remote.
| LF Antenna Location | HDS Indication (Functional Tests) |
|---|---|
| Left-front LF antenna/initiator | Driver (Door) Antenna Driving |
| Right-front LF antenna/initiator | Front Passenger (Door) Antenna Driving |
| Left-rear LF antenna/initiator | Driver Side Rear (Door) Antenna Driving |
| Right-rear LF antenna/initiator | Passenger Side Rear (Door) Antenna Driving |
- Functional Tests cannot operate at the same time, check the LF antennas one at a time.
- Test the transmitting area at about 90 cm (35.4 in) height from the ground.
- The LED will blink when the keyless remote is within the shaded areas.
6. Select the FUNCTIONAL TESTS, and do the antenna driving test by checking the transmitting areas (A) between the LF antenna and the keyless remote (except on the dashboard, in the glove box, door pockets, console box, and other enclosed areas).
| LF Antenna Location | HDS Indication (Functional Tests) |
|---|---|
| Front interior LF antenna | Front Interior Antenna Driving |
| Rear interior LF antenna | Rear Interior Antenna Driving |
Use the Manual With the Right Hardware
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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.
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