why is my Toyota Corolla E170 (2013-2019) AC not working during summer?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

578 words

Problem Statement

Learn how to diagnose and fix AC issues in Toyota Corolla E170 (2013-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening any components.

Symptoms

•AC blows warm air instead of cool air
•AC compressor does not engage
•Unusual noises from the AC system
•Foul odors coming from the vents
•Increased humidity inside the cabin
•"Check AC" warning light illuminated (if applicable)

Diagnostic Steps

1
Inspect the AC system for visible leaks or damage to components.
2
Check the refrigerant level using a manifold gauge set.
3
Scan for error codes using an OBD-II scanner to identify any system faults.
4
Test the AC compressor operation by checking the electrical connections and relay.
5
Inspect the cabin air filter for clogs or blockages.
6
Check the condition of the AC condenser for debris or damage.

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
•Manifold gauge set
•Vacuum pump
•Socket set
•Torque wrench

Parts Required

•Refrigerant (R-134a)
•AC compressor (if needed)
•Cabin air filter

Related Faults

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Diagnostic Steps

1
Inspect the AC system for visible leaks or damage to components.
2
Check the refrigerant level using a manifold gauge set.
3
Scan for error codes using an OBD-II scanner to identify any system faults.
4
Test the AC compressor operation by checking the electrical connections and relay.
5
Inspect the cabin air filter for clogs or blockages.
6
Check the condition of the AC condenser for debris or damage.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the vehicle's battery to ensure safety while working on electrical components.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Refrigerant Recharge

Tools Required: Manifold gauge set, refrigerant (R-134a), vacuum pump
Sub-steps:
1. Connect the manifold gauge set to the low and high-pressure ports of the AC system.
2. Check the refrigerant level; if low, proceed to recharge.
3. Use a vacuum pump to evacuate the system for at least 30 minutes to remove moisture.
4. Recharge the system with the appropriate amount of R-134a refrigerant as specified in the owner's manual.

3. AC Compressor Replacement (if necessary)

Tools Required: Socket set, torque wrench, AC compressor replacement kit
Sub-steps:
1. Remove the drive belt from the AC compressor.
2. Disconnect the electrical connector and the refrigerant lines from the compressor.
3. Remove the mounting bolts and take out the old compressor.
4. Install the new compressor, ensuring the O-rings are lubricated and properly seated.
5. Reconnect the refrigerant lines and electrical connector.
6. Reinstall the drive belt according to the routing diagram.

4. Cabin Air Filter Replacement

Tools Required: None specifically
Sub-steps:
1. Locate the cabin air filter access panel, typically under the dashboard.
2. Remove the panel and take out the old filter.
3. Install a new cabin air filter, ensuring it is oriented correctly.
4. Reinstall the access panel.