how to troubleshoot my Ram 1500 DT (2019-Present) key fob not working

Ram 1500 DT (2019-Present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

570 words

Problem Statement

Learn how to troubleshoot and fix a non-working key fob for Ram 1500 DT (2019-Present). Step-by-step guide with diagnostic steps and solutions.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in park and turn off the ignition before proceeding.

Symptoms

•Key fob buttons unresponsive
•Vehicle not recognizing the key fob when near
•Warning message on the dashboard indicating 'Key Fob Not Detected'
•Inability to start the engine using the push-button ignition
•Physical wear or damage visible on the key fob

Diagnostic Steps

1
Check the Key Fob Battery: Open the key fob and inspect the battery for corrosion or low voltage.
2
Test Key Fob Functionality: Use a multimeter to check the battery voltage; it should be around 3V for CR2032 batteries.
3
Inspect for Physical Damage: Look for any visible cracks or broken components on the key fob.
4
Reprogram Key Fob: Follow the car’s manual to attempt reprogramming the key fob if the vehicle recognizes it as unprogrammed.
5
Check Vehicle Battery: Ensure the vehicle's battery is charged and in good condition; a weak battery can affect key fob operation.
6
Scan for Error Codes: Use an OBD-II scanner to check for any related error codes that may indicate a problem with the keyless entry system.

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
•CR2032 battery
•Multimeter

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the Key Fob Battery: Open the key fob and inspect the battery for corrosion or low voltage.
2
Test Key Fob Functionality: Use a multimeter to check the battery voltage; it should be around 3V for CR2032 batteries.
3
Inspect for Physical Damage: Look for any visible cracks or broken components on the key fob.
4
Reprogram Key Fob: Follow the car’s manual to attempt reprogramming the key fob if the vehicle recognizes it as unprogrammed.
5
Check Vehicle Battery: Ensure the vehicle's battery is charged and in good condition; a weak battery can affect key fob operation.
6
Scan for Error Codes: Use an OBD-II scanner to check for any related error codes that may indicate a problem with the keyless entry system.

Solution

1. Preparation

Tools Required: Flathead screwdriver, CR2032 battery, multimeter.
Safety Warnings: Ensure the vehicle is in park and turn off the ignition before proceeding.

2. Replace Key Fob Battery

Open the Key Fob:
- Use a flathead screwdriver to gently pry open the key fob, starting at the seam.
Remove Old Battery:
- Take note of the orientation of the old battery. Remove it carefully to avoid damaging the contacts.
Install New Battery:
- Insert a new CR2032 battery in the same orientation, ensuring it fits snugly.
Close the Key Fob:
- Snap the two halves of the fob back together ensuring there are no gaps.

3. Reprogram the 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 Lock and Unlock Buttons:
- Press the LOCK button for 5 seconds, then press the UNLOCK button for 5 seconds.
Test the Key Fob:
- Turn the ignition off and test the key fob functions to ensure it's working properly.

4. Check Vehicle Battery

Inspect Battery Condition:
- Open the hood and visually inspect the battery for corrosion on terminals.
Test Battery Voltage:
- Use a multimeter to check that the vehicle battery voltage is above 12.4V.
Replace Battery if Needed:
- If the battery is low, replace it with a compatible automotive battery.