how to fix the remote start not working on my BMW 3 Series F30/F31 (2012-2019)

BMW 3 Series F30/F31 (2012-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

559 words

Problem Statement

The remote start feature is not functioning on a BMW 3 Series F30/F31 (2012-2019). This may be due to various issues including battery problems, key fob malfunctions, or software

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in a well-ventilated area when performing diagnostics to avoid carbon monoxide buildup.

Symptoms

•Remote start feature unresponsive when activated from key fob
•Check control message indicating a fault with the remote start system
•Engine does not crank when attempting to start remotely
•Key fob battery low or dead
•Possible warning lights illuminated on the dashboard

Diagnostic Steps

1
Check the battery level of the key fob using a multimeter.
2
Inspect the key fob for physical damage or wear.
3
Scan the vehicle’s onboard computer for error codes using an OBD-II scanner.
4
Verify that the remote start feature is enabled in the vehicle settings.
5
Check the vehicle's battery voltage to ensure it is within operational range.
6
Look for any blown fuses related to the remote start system in the fuse box.

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

•Sub-steps:**
•Use the flathead screwdriver to carefully pry open the key fob casing.
•Remove the old battery and replace it with a new CR2032 battery, ensuring correct polarity.
•Snap the fob casing back together securely.

Parts Required

•CR2032 battery
•Replacement fuse (if required)

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Diagnostic Steps

1
Check the battery level of the key fob using a multimeter.
2
Inspect the key fob for physical damage or wear.
3
Scan the vehicle’s onboard computer for error codes using an OBD-II scanner.
4
Verify that the remote start feature is enabled in the vehicle settings.
5
Check the vehicle's battery voltage to ensure it is within operational range.
6
Look for any blown fuses related to the remote start system in the fuse box.

Solution

1. Key Fob Battery Replacement

Tools Required: Small flathead screwdriver, CR2032 battery.
Sub-steps:
1. Use the flathead screwdriver to carefully pry open the key fob casing.
2. Remove the old battery and replace it with a new CR2032 battery, ensuring correct polarity.
3. Snap the fob casing back together securely.

2. Software Reset

Tools Required: OBD-II scanner.
Sub-steps:
1. Connect the OBD-II scanner to the vehicle's OBD-II port.
2. Power on the ignition without starting the engine.
3. Navigate to the "Body Control" or "Comfort Access" module on the scanner.
4. Select "Reset" or "Reboot" to clear any software glitches.
5. Disconnect the scanner and turn the ignition off and back on.

3. Fuse Inspection and Replacement

Tools Required: Fuse puller or needle-nose pliers.
Sub-steps:
1. Locate the fuse box (typically found under the dashboard or in the engine compartment).
2. Identify the fuse related to the remote start feature (refer to the owner's manual for the fuse diagram).
3. Inspect the fuse; if it is blown, remove it using the fuse puller.
4. Replace with a new fuse of the same amperage.
5. Close the fuse box securely.

4. Battery Voltage Check

Tools Required: Multimeter.
Sub-steps:
1. Set the multimeter to measure DC voltage.
2. Connect the multimeter probes to the vehicle battery terminals (red to positive, black to negative).
3. Check the voltage; it should read between 12.4V and 12.7V for optimal performance.
4. If the voltage is low, consider charging or replacing the vehicle battery.