how to fix the air conditioning in my Toyota Corolla E170 (2013-2019)

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

609 words

Problem Statement

Learn how to diagnose and fix the air conditioning issues in your 2013-2019 Toyota Corolla E170. Step-by-step guide with symptoms and solutions.

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 performing any repairs.

Symptoms

•Air conditioning does not produce cold air
•Strange noises coming from the AC compressor
•AC system blows warm air
•Unpleasant odors from the vents
•AC compressor not engaging
•Visible leaks around the AC components

Diagnostic Steps

1
Check the refrigerant level using a refrigerant gauge; low levels may indicate a leak.
2
Inspect the AC compressor visually for signs of wear or damage.
3
Listen for unusual noises from the compressor when the AC is turned on.
4
Scan the vehicle's onboard computer using an OBD-II scanner for error codes related to the AC system.
5
Inspect the cabin air filter for clogs or debris that may restrict airflow.
6
Test the AC relay and fuses to ensure they are operational.

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
•Refrigerant gauge
•Screwdriver or pliers
•Multimeter
•Socket set
•Torque wrench

Parts Required

•Refrigerant canister
•Cabin air filter
•AC relay or fuses
•AC compressor (if needed)

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Diagnostic Steps

1
Check the refrigerant level using a refrigerant gauge; low levels may indicate a leak.
2
Inspect the AC compressor visually for signs of wear or damage.
3
Listen for unusual noises from the compressor when the AC is turned on.
4
Scan the vehicle's onboard computer using an OBD-II scanner for error codes related to the AC system.
5
Inspect the cabin air filter for clogs or debris that may restrict airflow.
6
Test the AC relay and fuses to ensure they are operational.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to prevent electrical shocks.
Ensure the vehicle is parked on a level surface with the engine off and cooled down.

2. Recharge Refrigerant

Tools Required: Refrigerant gauge, refrigerant canister.
Open the hood and locate the low-pressure service port on the AC system.
Attach the refrigerant gauge to the service port and check the pressure.
If low, follow the instructions on the refrigerant canister to recharge the system. Ensure you do not overcharge.

3. Replace Cabin Air Filter

Tools Required: Screwdriver or pliers (if needed).
Locate the cabin air filter access panel (usually behind the glove box).
Open the panel and carefully remove the old filter.
Install a new cabin air filter, ensuring it is oriented correctly.
Reassemble the access panel.

4. Inspect and Replace AC Relay or Fuses

Tools Required: Multimeter.
Locate the fuse box, usually beneath the dashboard or under the hood.
Use the multimeter to check the AC relay and fuses for continuity.
If any fuses are blown or the relay is not functioning, replace them with the same type and rating.

5. Inspect and Replace AC Compressor (if necessary)

Tools Required: Socket set, torque wrench, AC compressor oil.
Disconnect the electrical connector and hoses from the AC compressor.
Remove the mounting bolts securing the compressor and take out the old compressor.
Install the new compressor, making sure to add the appropriate AC compressor oil.
Reattach hoses and electrical connectors and secure with bolts to the manufacturer’s torque specifications.