why does my Toyota Corolla E170 (2013-2019) AC not blow cold air?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

544 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 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 components.
•Wear safety glasses and gloves when handling refrigerants.

Symptoms

•AC system blowing warm or hot air
•AC compressor not engaging
•Unusual noises from the AC system (clicking or hissing)
•Increased humidity inside the vehicle
•AC system does not respond to temperature adjustments

Diagnostic Steps

1
Check the AC system's refrigerant level using a gauge set.
2
Inspect the AC compressor for signs of damage or wear.
3
Test the AC control module and related electrical connections.
4
Use an OBD-II scanner to check for error codes related to the AC system.
5
Inspect the cabin air filter for clogs or restrictions.

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

•Gauge set for refrigerant
•Multimeter
•Socket set

Parts Required

•Refrigerant (R-134a)
•AC compressor (if replacement is necessary)
•AC control module (if replacement is necessary)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the AC system's refrigerant level using a gauge set.
2
Inspect the AC compressor for signs of damage or wear.
3
Test the AC control module and related electrical connections.
4
Use an OBD-II scanner to check for error codes related to the AC system.
5
Inspect the cabin air filter for clogs or restrictions.

Solution

1. Preparation

Tools Required: Gauge set for refrigerant, multimeter, socket set
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to avoid any electrical issues during repairs.

2. Check Refrigerant Level

Sub-steps:
1. Attach the low and high-pressure gauges to the AC service ports.
2. Start the engine and turn the AC to maximum cold setting.
3. Read the pressure levels on both gauges.
4. If the refrigerant level is low, proceed to recharge the system.

3. Recharge AC System

Sub-steps:
1. Connect a refrigerant canister to the low-pressure service port.
2. Open the canister valve and allow refrigerant to enter the system, observing gauge readings.
3. Stop when the correct pressure is reached (refer to vehicle specifications).
4. Disconnect the refrigerant canister.

4. Inspect AC Compressor

Sub-steps:
1. Locate the AC compressor in the engine bay.
2. Check for visible signs of damage or leaks (oil spots or cracks).
3. Use a multimeter to test the compressor clutch for continuity.
4. If the compressor is faulty, replace it.

5. Test AC Control Module

Sub-steps:
1. Locate the AC control module in the vehicle.
2. Inspect the wiring harness for damage or corrosion.
3. Use the multimeter to check for voltage at the connector when the AC is activated.
4. If there is no voltage, the control module may need replacement.