why does my Toyota Corolla E170 (2013-2019) AC stop working when I accelerate

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

504 words

Problem Statement

Learn how to diagnose and fix AC issues during acceleration in Toyota Corolla E170 (2013-2019). Step-by-step guide with diagnostic procedures 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 components.
•Use safety glasses and gloves when handling refrigerants.

Symptoms

•AC blows warm air during acceleration
•AC compressor does not engage
•Fluctuating AC performance at different RPMs
•Increased engine load noise when AC is turned on
•Possible dashboard warning lights illuminated

Diagnostic Steps

1
Inspect the AC system for visible leaks or damage.
2
Use an OBD-II scanner to check for any related error codes.
3
Verify the AC compressor clutch operation while the engine is running.
4
Check the refrigerant level to ensure it is within specifications.
5
Test the electrical connections to the AC compressor and relay.
6
Inspect the serpentine belt for wear or slippage.

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 set
•Multimeter
•Socket set
•Torque wrench
•Screwdrivers

Parts Required

•New AC compressor (if needed)
•AC relay (if defective)
•Refrigerant

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Diagnostic Steps

1
Inspect the AC system for visible leaks or damage.
2
Use an OBD-II scanner to check for any related error codes.
3
Verify the AC compressor clutch operation while the engine is running.
4
Check the refrigerant level to ensure it is within specifications.
5
Test the electrical connections to the AC compressor and relay.
6
Inspect the serpentine belt for wear or slippage.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Check Refrigerant Level

Connect a refrigerant gauge to the low-pressure service port.
Compare the readings to the manufacturer's specifications.
If low, recover the refrigerant and refill with the appropriate type.

3. Inspect and Replace AC Compressor

Locate the AC compressor in the engine bay.
Remove the serpentine belt by loosening the tensioner.
Disconnect the electrical connector and refrigerant lines from the compressor.
Unbolt the compressor and remove it from the engine.
Install the new compressor by reversing the removal steps and ensuring all connections are secure.
Reinstall the serpentine belt, ensuring proper routing.

4. Check and Replace AC Relay (if necessary)

Locate the AC relay in the fuse box.
Remove the relay and test it with a multimeter for continuity.
Replace the relay if defective.

5. System Recharge and Leak Test

Reconnect the negative battery terminal.
Recharge the AC system with the proper refrigerant type and amount.
Perform a leak test using a UV dye or electronic leak detector to ensure system integrity.