how to fix the AC not working in my Toyota Corolla E170 (2013-2019)?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

553 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 to prevent short circuits.
•Wear safety goggles and gloves when handling refrigerants.

Symptoms

•AC blows warm air
•Unusual noises when the AC is turned on
•AC compressor not engaging
•Fluctuating air flow from AC vents
•Foul odor from AC system
•Dashboard warning lights (if applicable)

Diagnostic Steps

1
Check the AC system's refrigerant level using a refrigerant gauge.
2
Inspect the AC compressor for proper engagement and any visible damage.
3
Examine the AC fuses and relays for continuity and signs of failure.
4
Scan the vehicle's onboard computer for diagnostic trouble codes (DTCs) related to the AC system.
5
Inspect the cabin air filter for clogs or excessive dirt.
6
Test the AC control module and climate control settings for proper functionality.

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

•Refrigerant gauge
•Refrigerant canister
•Socket set
•Torque wrench
•Serpentine belt tool
•Small flathead screwdriver

Parts Required

•R-134a refrigerant (if low)
•AC compressor (if faulty)
•Cabin air filter

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Diagnostic Steps

1
Check the AC system's refrigerant level using a refrigerant gauge.
2
Inspect the AC compressor for proper engagement and any visible damage.
3
Examine the AC fuses and relays for continuity and signs of failure.
4
Scan the vehicle's onboard computer for diagnostic trouble codes (DTCs) related to the AC system.
5
Inspect the cabin air filter for clogs or excessive dirt.
6
Test the AC control module and climate control settings for proper functionality.

Solution

1. Preparation

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

2. Recharge Refrigerant

Tools Required: Refrigerant gauge, refrigerant canister.
Connect the refrigerant gauge to the low-pressure service port.
Check the pressure reading; if low, add refrigerant according to specifications (R-134a for this model).
Monitor the pressure until it reaches the manufacturer's recommended level.

3. Inspect and Replace AC Compressor

Tools Required: Socket set, torque wrench, serpentine belt tool.
Locate the AC compressor and visually inspect for signs of wear or leaks.
Remove the serpentine belt from the AC compressor pulley.
Disconnect the electrical connector and refrigerant lines from the compressor.
Unbolt and remove the compressor.
Install the new compressor, ensuring it is securely fastened (refer to torque specifications).
Reconnect the refrigerant lines and electrical connector.

4. Replace Cabin Air Filter

Tools Required: None (but may require a small flathead screwdriver).
Open the glove compartment and remove it by detaching the stops.
Locate the air filter housing behind the glove compartment.
Remove the old cabin air filter and install the new one, ensuring it is oriented correctly.

5. Test and Reassemble

Reconnect the battery and start the vehicle.
Turn on the AC to the highest setting and check for cold air.
Ensure there are no unusual noises or leaks from the AC system.
Reassemble any components removed during the repair.