how to troubleshoot the blind spot monitoring system in Toyota Corolla E170 (2013-2019)

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

560 words

Problem Statement

Learn how to troubleshoot the blind spot monitoring system in a 2013-2019 Toyota Corolla E170. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to avoid short circuits or shocks.

Symptoms

•Blind spot monitoring indicators do not illuminate when vehicles are detected.
•Warning chimes are not sounding when vehicles are in the blind spot.
•Malfunction indicator light is illuminated on the dashboard.
•System operates intermittently or only in certain conditions.
•Visual display on the side mirrors is not functioning.

Diagnostic Steps

1
Scan the vehicle’s onboard diagnostic system using an OBD-II scanner to retrieve any error codes related to the BSM system.
2
Inspect the blind spot sensors located in the rear bumper for physical damage or obstruction (such as dirt or debris).
3
Check the wiring and connectors leading to the blind spot sensors for corrosion or loose connections.
4
Perform a visual inspection of the BSM control module for any signs of damage or water intrusion.
5
Test the sensors with a multimeter to ensure proper voltage and resistance readings.
6
Verify that the BSM system is activated through the vehicle settings in the infotainment 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

•OBD-II scanner
•Multimeter
•Socket set
•Screwdriver set
•Wire cutters
•Soldering iron
•Soft cloth
•Cleaning solution

Parts Required

•Blind spot sensors (if damaged)
•BSM control module (if faulty)
•Wiring harness (if damaged)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Symptoms

•Blind spot monitoring indicators do not illuminate when vehicles are detected.

•Warning chimes are not sounding when vehicles are in the blind spot.

•Malfunction indicator light is illuminated on the dashboard.

•System operates intermittently or only in certain conditions.

•Visual display on the side mirrors is not functioning.

Diagnostic Steps

1
Scan the vehicle’s onboard diagnostic system using an OBD-II scanner to retrieve any error codes related to the BSM system.
2
Inspect the blind spot sensors located in the rear bumper for physical damage or obstruction (such as dirt or debris).
3
Check the wiring and connectors leading to the blind spot sensors for corrosion or loose connections.
4
Perform a visual inspection of the BSM control module for any signs of damage or water intrusion.
5
Test the sensors with a multimeter to ensure proper voltage and resistance readings.
6
Verify that the BSM system is activated through the vehicle settings in the infotainment system.

Solution

1. Preparation

Gather tools and components needed for the repair.
Disconnect the vehicle battery to ensure safety while working on electrical systems.
Tools Required: OBD-II scanner, multimeter, socket set, screwdriver set, cleaning materials.

2. Inspect and Clean Sensors

Remove any debris or dirt from the blind spot sensors using a soft cloth.
If sensors are damaged, proceed to replace them.
Tools Required: Soft cloth, cleaning solution (if necessary).

3. Repair or Replace Wiring

Inspect the wiring harness connecting to the blind spot sensors.
If any wires are frayed or damaged, repair them by soldering new wire sections or replace the entire harness if necessary.
Tools Required: Wire cutters, soldering iron, heat shrink tubing.

4. Replace Control Module (if necessary)

If the control module is determined to be faulty, remove it from its mounting location.
Disconnect the wiring harness and install the new module, making sure all connections are secure.
Tools Required: Socket set, screwdriver set.

5. Reconnect Battery and Test System

Once all repairs are completed, reconnect the vehicle battery.
Check for any new error codes using the OBD-II scanner.
Tools Required: OBD-II scanner.