my Ram 1500 DT (2019-Present) won't unlock with the remote what to check

Ram 1500 DT (2019-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

494 words

Problem Statement

Learn how to diagnose and fix the key fob not unlocking issue in Ram 1500 DT (2019-Present). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the vehicle battery before working on electrical components to prevent shorts.

Symptoms

•Remote key fob not responding
•Indicator light on the key fob not illuminating
•Vehicle does not respond when pressing unlock button
•Manual key entry also fails to unlock the door
•Battery drain in the vehicle may have occurred

Diagnostic Steps

1
Check the battery in the remote key fob for charge and proper installation.
2
Inspect for any visible damage or wear on the key fob.
3
Test the key fob using a second vehicle, if available, to confirm it's not a vehicle issue.
4
Verify that the vehicle’s door locks are functioning manually using the internal lock/unlock switch.
5
Scan the vehicle’s body control module (BCM) for any error codes using an OBD-II scanner.

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

•OBD-II scanner
•Flathead screwdriver
•Multimeter
•Torx or socket set

Parts Required

•CR2032 battery

Related Faults

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Diagnostic Steps

1
Check the battery in the remote key fob for charge and proper installation.
2
Inspect for any visible damage or wear on the key fob.
3
Test the key fob using a second vehicle, if available, to confirm it's not a vehicle issue.
4
Verify that the vehicle’s door locks are functioning manually using the internal lock/unlock switch.
5
Scan the vehicle’s body control module (BCM) for any error codes using an OBD-II scanner.

Solution

1. Key Fob Battery Replacement

Remove the key fob cover: Use a small flathead screwdriver to gently pry open the fob.
Replace the battery: Remove the old battery and install a new CR2032 battery, ensuring correct polarity.
Reassemble the key fob: Snap the fob cover back together securely.

2. Reprogram Key Fob (if necessary)

Enter Programming Mode: Insert the key into the ignition and turn it to the "ON" position without starting the engine.
Press the unlock button: Press and hold the unlock button on the fob for about 10 seconds or until the locks cycle.
Test the key fob: Once the programming is complete, test the unlock function.

3. Inspect Central Locking System

Access the driver's door panel: Remove screws and clips to detach the panel.
Check wiring connections: Inspect the wiring harness for any loose or damaged connections.
Test the door lock actuator: Use a multimeter to check for continuity and function.

4. Check the Body Control Module (BCM)

Locate the BCM: Refer to the vehicle’s service manual for the exact location.
Inspect connections and grounds: Ensure all connections are secure and there are no corroded ground points.
Replace BCM if necessary: If diagnostics indicate a fault, replace the BCM with a new unit.