my Toyota Corolla E170 (2013-2019) AC stops blowing cold air how to fix it

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

532 words

Problem Statement

Learn how to diagnose and fix AC not blowing cold air 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 systems.
•Wear safety glasses and gloves when handling refrigerant.

Symptoms

•Warm air blowing from the AC vents
•AC compressor not engaging
•Unusual noises from the AC system
•Condensation on the AC lines
•"Check AC" warning light illuminated on the dashboard

Diagnostic Steps

1
Check the AC system's refrigerant level using a manifold gauge set.
2
Inspect the AC compressor for any visible damage or leaks.
3
Verify that the AC fuse is intact and functioning.
4
Test the AC clutch for engagement using a multimeter.
5
Scan for any error codes using an OBD-II scanner to identify specific 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

•Manifold gauge set
•Refrigerant canister
•Multimeter
•Socket set
•Torque wrench

Parts Required

•Refrigerant (R134a)
•AC compressor (if faulty)
•AC clutch (if faulty)

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Diagnostic Steps

1
Check the AC system's refrigerant level using a manifold gauge set.
2
Inspect the AC compressor for any visible damage or leaks.
3
Verify that the AC fuse is intact and functioning.
4
Test the AC clutch for engagement using a multimeter.
5
Scan for any error codes using an OBD-II scanner to identify specific issues.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to ensure safety during repairs.

2. Recharge the AC System

Connect Manifold Gauge Set
- Attach the high and low-pressure gauges to the AC service ports.
- Ensure the vehicle is off during this connection.
Check Refrigerant Level
- Start the engine and turn the AC to the maximum setting.
- Observe the pressure readings; refer to specifications for proper levels.
- If low, proceed to the next step.
Recharge AC System
- Connect a refrigerant canister to the low-pressure side of the manifold.
- Open the canister valve and allow refrigerant to flow into the system until proper pressure is reached.
- Monitor the gauges to avoid overcharging.

3. Inspect and Replace Components

Inspect AC Compressor
- Check for any signs of wear or damage.
- If the compressor is faulty, disconnect the electrical connector and remove the mounting bolts.
- Replace with a new compressor, using the manufacturer’s specifications for torque.
Check AC Clutch
- If the clutch is not engaging, it may need to be replaced. Disconnect the electrical connector, then remove the clutch retaining bolts.
- Install the new clutch assembly and reconnect the electrical connector.

4. System Check

After recharging and replacing parts, reconnect the battery.
Start the engine and run the AC to ensure it is blowing cold air.
Check for any leaks around the components using a UV leak detection dye if necessary.