how do I fix the interior lights staying on in my Toyota Corolla E170 (2013-2019)?

Toyota Corolla E170 (2013-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

573 words

Problem Statement

Learn how to diagnose and fix interior lights staying on in Toyota Corolla E170 (2013-2019). Step-by-step guide with tools and tips.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Interior lights stay on continuously
•Dimmed dashboard lights
•Battery drains when the vehicle is off
•Malfunctioning door switches
•Potentially illuminated warning lights on the dashboard

Diagnostic Steps

1
Inspect the door switches for proper operation; ensure they are not stuck or malfunctioning.
2
Check the vehicle's lighting control switch to ensure it is in the correct position (typically to 'Off' or 'Door').
3
Use an OBD-II scanner to check for any error codes that might indicate issues with the body control module (BCM).
4
Verify the condition of the interior light bulbs; replace any burnt-out bulbs if necessary.
5
Examine the fuse related to the interior lights to ensure it is not blown.
6
Test the battery voltage to see if the vehicle battery is functioning properly.

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
•Cleaning spray
•Socket set
•Fuse puller or needle-nose pliers
•OBD-II scanner

Parts Required

•Door switch (if defective)
•Lighting control switch (if defective)
•Interior light fuse (if blown)

Related Faults

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Diagnostic Steps

1
Inspect the door switches for proper operation; ensure they are not stuck or malfunctioning.
2
Check the vehicle's lighting control switch to ensure it is in the correct position (typically to 'Off' or 'Door').
3
Use an OBD-II scanner to check for any error codes that might indicate issues with the body control module (BCM).
4
Verify the condition of the interior light bulbs; replace any burnt-out bulbs if necessary.
5
Examine the fuse related to the interior lights to ensure it is not blown.
6
Test the battery voltage to see if the vehicle battery is functioning properly.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative terminal of the battery to prevent electrical shock or shorts.

2. Inspect and Clean Door Switches

Tools Required: Flathead screwdriver, cleaning spray
Remove the door panel using a flathead screwdriver to carefully pry off clips.
Inspect the door switch for debris or damage; clean it with a suitable cleaning spray.
Ensure the switch moves freely and returns to its original position when pressed.

3. Check Lighting Control Switch

Tools Required: None
Locate the lighting control switch (usually on the dashboard).
Rotate the switch to the "Off" position and back to "Door" to reset it.
Test the function to verify if the interior lights respond accordingly.

4. Replace Malfunctioning Components

Tools Required: Socket set, screwdrivers
If any door switches are found defective, remove the switch wiring connector and replace the switch.
If the lighting control switch is faulty, replace it by removing it from the dashboard.

5. Replace Fuse

Tools Required: Fuse puller or needle-nose pliers
Locate the fuse box (usually under the dashboard or in the engine compartment).
Identify the interior light fuse using the diagram on the fuse box cover.
Remove the blown fuse and replace it with one of the same amperage.

6. Reconnect Battery and Test

Reconnect the negative battery terminal.
Test the interior lights by opening and closing the doors and turning the lighting control switch.
Ensure all lights function correctly and turn off when doors are closed.