my Toyota Corolla E170 (2013-2019) power locks are not responding, what should I check?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

529 words

Problem Statement

Learn how to diagnose and fix power locks not responding in Toyota Corolla E170 (2013-2019). 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 prevent shocks or short circuits.

Symptoms

•Power locks do not respond to the key fob or door switches
•No audible click or noise when attempting to lock/unlock
•Check engine light may be illuminated (indirectly related)
•Battery may be dead or showing low voltage
•Locking mechanism may be stuck or jammed

Diagnostic Steps

1
Inspect the key fob battery and replace if necessary.
2
Check the vehicle battery voltage to ensure it is above 12.4 volts.
3
Test the power window switches for functionality, as they may share the same circuit.
4
Use an OBD-II scanner to check for any fault codes related to the body control module (BCM).
5
Inspect fuses related to the power locks in the fuse box.
6
Visually inspect the wiring and connectors at the door for any signs of damage or corrosion.

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
•Fuse puller
•Screwdrivers

Parts Required

•Replacement fuse (if blown)
•Replacement lock actuator (if faulty)
•Key fob battery (if dead)

Related Faults

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Diagnostic Steps

1
Inspect the key fob battery and replace if necessary.
2
Check the vehicle battery voltage to ensure it is above 12.4 volts.
3
Test the power window switches for functionality, as they may share the same circuit.
4
Use an OBD-II scanner to check for any fault codes related to the body control module (BCM).
5
Inspect fuses related to the power locks in the fuse box.
6
Visually inspect the wiring and connectors at the door for any signs of damage or corrosion.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the battery to ensure safety while working on electrical components.

2. Check and Replace Fuses

Locate the fuse box (usually under the dashboard or hood).
Remove the fuse for the power locks using a fuse puller or pliers.
Inspect the fuse for continuity; if blown, replace it with a fuse of the same amperage.

3. Inspect and Repair Wiring

Remove any door panels as needed to access the wiring harness.
Check for frayed wires, broken connectors, or any corrosion.
Repair any damaged wires by splicing in new wire and using heat-shrink tubing for insulation.

4. Test Power Lock Actuators

With the door panel removed, use a multimeter to check the voltage at the lock actuator connector while pressing the lock/unlock button.
If there is no voltage present, the issue may be with the BCM or further upstream in the circuit.
If voltage is present but the actuator does not respond, replace the lock actuator.

5. Reassemble and Reconnect

Reattach the door panel securely.
Reconnect the battery and ensure all electrical connections are secure.