my Toyota Corolla E170 (2013-2019) power locks not working, how can I fix it?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

591 words

Problem Statement

Learn how to diagnose and fix power locks not working in Toyota Corolla E170 (2013-2019). Step-by-step guide with symptoms, diagnostic steps, 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.

Symptoms

•Power lock switch does not respond
•Remote key fob fails to lock or unlock doors
•Indicator lights on the dashboard do not flash when attempting to lock/unlock
•Manual locking and unlocking works without issue
•Possible clicking sound from the door lock actuators
•Battery low indicator may be present on the fob

Diagnostic Steps

1
Check the battery condition of the key fob using a multimeter or replace the battery.
2
Scan for error codes using an OBD-II scanner to identify any related electrical faults.
3
Inspect the fuses related to the power door locks in the fuse box for any blown fuses.
4
Test the power lock switch for continuity using a multimeter.
5
Examine the wiring and connectors leading to the door lock actuators for damage or corrosion.
6
Inspect the door lock actuators for mechanical failure or electrical issues.

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

•Screwdriver set
•Multimeter
•Socket set
•Trim removal tool

Parts Required

•Key fob battery
•Power lock switch (if faulty)
•Door lock actuator (if faulty)
•Fuses (if blown)

Related Faults

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Symptoms

•Power lock switch does not respond

•Remote key fob fails to lock or unlock doors

•Indicator lights on the dashboard do not flash when attempting to lock/unlock

•Manual locking and unlocking works without issue

•Possible clicking sound from the door lock actuators

•Battery low indicator may be present on the fob

Diagnostic Steps

1
Check the battery condition of the key fob using a multimeter or replace the battery.
2
Scan for error codes using an OBD-II scanner to identify any related electrical faults.
3
Inspect the fuses related to the power door locks in the fuse box for any blown fuses.
4
Test the power lock switch for continuity using a multimeter.
5
Examine the wiring and connectors leading to the door lock actuators for damage or corrosion.
6
Inspect the door lock actuators for mechanical failure or electrical issues.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the battery to ensure safety during repairs.
Tools Required: Screwdriver set, multimeter, socket set.

2. Check and Replace Key Fob Battery

Open the key fob using a small flat-head screwdriver.
Remove the old battery and insert a new battery, ensuring correct polarity.
Reassemble the key fob and test the locks.

3. Inspect and Replace Fuses

Locate the fuse box (usually under the dashboard or in the engine compartment).
Identify the fuse for the power door locks and pull it out.
Inspect the fuse; if blown, replace it with a fuse of the same amperage.
Reinstall the fuse and check if the locks operate correctly.

4. Test and Replace Power Lock Switch

Remove the door panel using a screwdriver and trim tool to access the power lock switch.
Unplug the switch connector and test for continuity using a multimeter.
If there is no continuity, replace the switch with a new one.
Reassemble the door panel after the switch replacement.

5. Inspect and Replace Door Lock Actuators

If the previous steps do not resolve the issue, access the door lock actuator by removing the door panel.
Check for any visible damage or corrosion on the actuator.
Disconnect the actuator and test it with a multimeter for proper function.
If faulty, replace the door lock actuator with a new unit.
Reassemble the door panel after replacing the actuator.