my Toyota Corolla E170 (2013-2019) makes a buzzing noise when starting what's wrong

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

531 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Diagnose and fix buzzing noise during start in Toyota Corolla E170 (2013-2019). Step-by-step guide with diagnostic steps and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before starting any repair work.

Symptoms

•Buzzing noise when the ignition key is turned to the start position
•Possible dimming of dashboard lights during starting
•Engine cranking slowly or not at all
•Clicking sound in addition to buzzing noise
•No start condition despite battery being charged

Diagnostic Steps

1
Check the battery voltage using a multimeter to ensure it is above 12.4 volts.
2
Inspect battery terminals for corrosion or loose connections.
3
Test the starter motor by applying direct power from the battery.
4
Use an OBD-II scanner to check for any stored error codes that may indicate related issues.
5
Examine the fuel pump relay and fuse for any signs of failure.
6
Verify the operation of the ignition switch by checking for continuity when in the start position.

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

•Multimeter
•Socket set
•Wire brush
•Jumper cables
•Fuse puller

Parts Required

•Starter motor (if faulty)
•Fuel pump relay (if faulty)
•Fuses (if blown)

Related Faults

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Diagnostic Steps

1
Check the battery voltage using a multimeter to ensure it is above 12.4 volts.
2
Inspect battery terminals for corrosion or loose connections.
3
Test the starter motor by applying direct power from the battery.
4
Use an OBD-II scanner to check for any stored error codes that may indicate related issues.
5
Examine the fuel pump relay and fuse for any signs of failure.
6
Verify the operation of the ignition switch by checking for continuity when in the start position.

Solution

1. Preparation

Ensure the vehicle is in a safe and stable position (parked on a level surface).
Disconnect the negative terminal of the battery to prevent electrical shocks.
Gather necessary tools and parts.

2. Inspect and Clean Battery Connections

Tools Required: Wire brush or battery terminal cleaner, wrench.
Remove the battery terminals (negative first, then positive).
Clean the terminals and battery posts thoroughly to remove corrosion.
Reconnect the terminals (positive first, then negative).

3. Test and Replace the Starter Motor

Tools Required: Socket set, multimeter, jumper cables.
Remove the starter motor from the vehicle.
Test the starter motor by connecting it directly to the battery using jumper cables.
- If it does not engage, the starter motor should be replaced.
Install a new starter motor and torque bolts to the manufacturer’s specifications (typically around 10-15 ft-lbs).

4. Check the Fuel Pump Relay and Fuses

Tools Required: Fuse puller or needle-nose pliers.
Locate the fuse box and check the fuel pump relay and fuse.
Replace any blown fuses and a faulty relay with new components.

5. Reconnect Battery and Test

Reconnect the negative battery terminal.
Start the vehicle to verify the issue has been resolved.