Volkswagen Tiguan Second Generation (2018-present) remote key fob not working what to check

Volkswagen Tiguan 2nd Gen (2018-Present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

481 words

Problem Statement

Learn how to diagnose and fix a non-working key fob for Volkswagen Tiguan (2018-present). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the vehicle battery if working on electronic systems to avoid short circuits.

Symptoms

•Remote key fob does not unlock or lock the doors
•Key fob battery warning light is illuminated
•Inability to start the vehicle using the key fob
•Physical key works but remote functions do not
•Intermittent functionality when pressing buttons

Diagnostic Steps

1
Check the battery level of the key fob using a battery tester or multimeter.
2
Replace the battery in the key fob to see if it resolves the issue.
3
Inspect the key fob for physical damage or water exposure.
4
Verify that the vehicle's central locking system is functioning correctly.
5
Use an OBD-II scanner to check for any fault codes related to the keyless entry system.
6
Reprogram the key fob to the vehicle following the manufacturer's guidelines.

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
•Small Phillips screwdriver
•New battery (typically CR2032)
•OBD-II scanner (if needed)
•Multimeter

Parts Required

•New key fob battery (CR2032)

Related Faults

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Diagnostic Steps

1
Check the battery level of the key fob using a battery tester or multimeter.
2
Replace the battery in the key fob to see if it resolves the issue.
3
Inspect the key fob for physical damage or water exposure.
4
Verify that the vehicle's central locking system is functioning correctly.
5
Use an OBD-II scanner to check for any fault codes related to the keyless entry system.
6
Reprogram the key fob to the vehicle following the manufacturer's guidelines.

Solution

1. Preparation

Gather necessary tools: flathead screwdriver, small Phillips screwdriver, new battery (typically CR2032), OBD-II scanner (if needed), and a multimeter.
Ensure the vehicle is parked on a flat surface and the ignition is turned off.

2. Battery Replacement

Open the Key Fob:
- Use a flathead screwdriver to gently pry open the key fob casing along the seam without damaging the plastic.
Remove the Old Battery:
- Carefully take out the old battery, noting the orientation (positive and negative sides).
Install New Battery:
- Insert the new battery in the same orientation as the old one.
Reassemble the Key Fob:
- Snap the key fob casing back together, ensuring it clicks into place.

3. Testing Key Fob Functions

Test the Key Fob:
- Stand within a few feet of the vehicle and press the lock/unlock buttons to check functionality.
Reprogram the Key Fob (if necessary):
- If the key fob still does not work, follow the vehicle’s manual for reprogramming the key fob, which typically involves turning the ignition on and off with the fob in the ignition slot.