my Ram 1500 DT (2019-Present) key fob won’t unlock the doors what should I try

Ram 1500 DT (2019-Present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

558 words

Problem Statement

Learn how to diagnose and fix a key fob that won't unlock doors on a Ram 1500 DT (2019-Present). Step-by-step guide with troubleshooting and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is turned off before working on electrical components.

Symptoms

•Key fob buttons do not respond
•Doors do not unlock when pressing the fob
•Key fob LED light does not illuminate when buttons are pressed
•Manual unlocking works with the physical key
•Check engine light may be illuminated in some cases

Diagnostic Steps

1
Check Key Fob Battery: Open the key fob and inspect the battery for corrosion or low charge.
2
Test the Key Fob: Use a multimeter to measure the battery voltage; it should be around 3 volts.
3
Inspect Fob for Damage: Look for any physical damage to the key fob casing or buttons.
4
Reprogram the Key Fob: Follow the manufacturer's instructions for reprogramming the fob to the vehicle.
5
Check Vehicle Receiver: Inspect the receiver module in the vehicle for any faults or damage.
6
Test Alternate Key Fob: If available, test a second key fob to determine if the issue is with the fob or the vehicle itself.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Flathead screwdriver
•Multimeter

Parts Required

•Replacement key fob battery (CR2032)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check Key Fob Battery: Open the key fob and inspect the battery for corrosion or low charge.
2
Test the Key Fob: Use a multimeter to measure the battery voltage; it should be around 3 volts.
3
Inspect Fob for Damage: Look for any physical damage to the key fob casing or buttons.
4
Reprogram the Key Fob: Follow the manufacturer's instructions for reprogramming the fob to the vehicle.
5
Check Vehicle Receiver: Inspect the receiver module in the vehicle for any faults or damage.
6
Test Alternate Key Fob: If available, test a second key fob to determine if the issue is with the fob or the vehicle itself.

Solution

1. Preparation

Tools Required: Flathead screwdriver, multimeter, replacement key fob battery (CR2032).
Ensure the vehicle is in a safe location and turn off the ignition.

2. Replace Key Fob Battery

Open the Key Fob: Use a flathead screwdriver to gently pry open the key fob casing.
Remove the Old Battery: Take out the old battery and dispose of it properly.
Insert New Battery: Place the new CR2032 battery into the fob, ensuring the positive (+) side is facing up.
Reassemble the Key Fob: Snap the casing back together securely.

3. Reprogram the Key Fob

Enter Programming Mode: Insert the key into the ignition and turn it to the "On" position without starting the engine.
Press Lock and Unlock: Press and hold the "Lock" and "Unlock" buttons on the key fob simultaneously for about 5 seconds.
Turn Off Ignition: Turn the ignition to the "Off" position to exit programming mode.
Test the Key Fob: Try using the fob to unlock the doors.

4. Inspect Receiver Module (if needed)

Access the Receiver: Locate the receiver module, typically found under the dashboard or near the steering column.
Check Connections: Ensure all wiring and connectors are secure and free from corrosion.
Test the Module: If available, use a scan tool to check for any error codes related to the keyless entry system.