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

501 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

•Always disconnect the battery before working on electrical components.
•Handle refrigerants with care and follow local regulations for disposal.

Symptoms

•AC does not blow cold air
•Unusual noises when the AC is running
•AC compressor not engaging
•AC warning light illuminated on dashboard
•Foul smell from the AC vents

Diagnostic Steps

1
Check the AC system for refrigerant levels using a manifold gauge set.
2
Inspect the AC compressor for signs of physical damage or wear.
3
Verify the operation of the AC relay and fuse in the fuse box.
4
Use an OBD-II scanner to check for any error codes related to the AC system.
5
Inspect the AC cabin filter for clogs or contamination.
6
Examine the electrical connections to the AC compressor and control panel.

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
•Socket set
•Torque wrench
•Screwdrivers

Parts Required

•Refrigerant
•AC compressor (if faulty)
•Cabin air filter

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Diagnostic Steps

1
Check the AC system for refrigerant levels using a manifold gauge set.
2
Inspect the AC compressor for signs of physical damage or wear.
3
Verify the operation of the AC relay and fuse in the fuse box.
4
Use an OBD-II scanner to check for any error codes related to the AC system.
5
Inspect the AC cabin filter for clogs or contamination.
6
Examine the electrical connections to the AC compressor and control panel.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety during repairs.
Allow the engine to cool before starting work on the AC system.

2. Recharge Refrigerant

Tools Required: Manifold gauge set, refrigerant canister
Connect the manifold gauge set to the AC service ports (low and high).
Check pressure readings; if low, proceed to recharge.
Follow the guidelines on the refrigerant canister to add refrigerant until proper levels are reached.
Monitor the pressures to ensure they are within manufacturer specifications.

3. Inspect and Replace Components

Tools Required: Socket set, torque wrench, screwdrivers
If the compressor is suspected to be faulty, remove it:
- Disconnect the electrical connector and discharge the refrigerant from the system.
- Remove the mounting bolts and take out the compressor.
- Install the new compressor, following the manufacturer's torque specifications for the bolts.
If the cabin air filter is clogged, remove the glove compartment to access the filter housing, and replace it with a new one.

4. Test AC System

Reconnect the battery.
Start the engine and turn on the AC to check if the system is functioning properly.
Monitor for any unusual noises or warning lights.