how to diagnose why my Toyota Corolla E170 (2013-2019) won’t start?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

641 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

Learn how to diagnose and fix no-start issues in Toyota Corolla E170 (2013-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the negative battery terminal before working on electrical systems.
•Allow the engine to cool before working on any hot components.

Symptoms

•Engine cranks but fails to start
•No sound when the ignition key is turned
•Dashboard lights illuminate but engine remains off
•Clicking sound when attempting to start
•Security/immobilizer warning light is on
•Battery warning light is illuminated

Diagnostic Steps

1
Inspect the battery condition and connections for corrosion or looseness.
2
Check the fuses related to the ignition and fuel systems.
3
Use an OBD-II scanner to check for any stored trouble codes.
4
Test the starter motor operation using a multimeter.
5
Verify the fuel pump operation by listening for it to prime when the ignition is turned on.
6
Check for spark at the ignition coils or spark plugs.

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
•Battery terminal cleaner
•Wrench
•Fuse puller or needle-nose pliers
•Socket set
•Torque wrench
•Fuel pressure gauge
•OBD-II scanner

Parts Required

•New battery (if faulty)
•Ignition and fuel system fuses (if blown)
•Starter motor (if defective)
•Fuel pump (if not operational)
•Spark plugs or ignition coils (if faulty)

Related Faults

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Diagnostic Steps

1
Inspect the battery condition and connections for corrosion or looseness.
2
Check the fuses related to the ignition and fuel systems.
3
Use an OBD-II scanner to check for any stored trouble codes.
4
Test the starter motor operation using a multimeter.
5
Verify the fuel pump operation by listening for it to prime when the ignition is turned on.
6
Check for spark at the ignition coils or spark plugs.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to avoid electrical shock.
Ensure the vehicle is in a safe, well-ventilated area.

2. Battery Inspection and Replacement

Sub-steps:
1. Inspect the battery terminals for corrosion and ensure they are tight.
2. If the battery is weak (under 12.4 volts), jump-start the vehicle or replace the battery.
Tools Required:
- Multimeter
- Battery terminal cleaner
- Wrench (for terminal connections)

3. Fuse Check and Replacement

Sub-steps:
1. Locate the fuse box and identify the ignition and fuel system fuses.
2. Remove the fuses and inspect them for continuity; replace any blown fuses with the same amperage rating.
Tools Required:
- Fuse puller or needle-nose pliers

4. Starter Motor Testing and Replacement

Sub-steps:
1. Using a multimeter, check if the starter motor receives power when the key is turned.
2. If no power is detected, trace the wiring back to the ignition switch.
3. If power is present and the starter does not engage, replace the starter motor.
Tools Required:
- Multimeter
- Socket set
- Torque wrench

5. Fuel System Check

Sub-steps:
1. Turn the ignition key to the "ON" position without starting the engine and listen for the fuel pump hum.
2. If there is no sound, check the fuel pump relay and wiring.
3. If necessary, replace the fuel pump.
Tools Required:
- Fuel pressure gauge (if testing fuel pressure is needed)

6. Ignition System Check

Sub-steps:
1. Remove one spark plug and check for any signs of wear or fouling.
2. Using a spark tester, verify if there is a spark when the engine is cranked.
3. Replace the ignition coils or spark plugs if there is no spark present.
Tools Required:
- Spark tester
- Socket set for spark plug removal