my Toyota Corolla E170 (2013-2019) is experiencing intermittent starting issues, why?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

573 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 intermittent starting issues in the 2013-2019 Toyota Corolla E170. Step-by-step guide with diagnostic procedures 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 systems.
•Relieve fuel system pressure before disconnecting any fuel lines.

Symptoms

•Engine cranks but does not start
•No sound from the fuel pump when the ignition is turned on
•Dashboard lights dim or flicker during starting attempts
•Check engine light illuminated
•Occasional successful starts followed by subsequent failures

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Check the battery voltage with a multimeter to ensure it is within the acceptable range (12.4V or higher).
3
Inspect battery terminals and connections for corrosion or looseness.
4
Test the fuel pump relay for continuity and operation.
5
Verify fuel pressure at the fuel rail using a fuel pressure gauge.
6
Check the ignition system components (spark plugs, ignition coils) for wear or failure.

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

•OBD-II scanner
•Multimeter
•Fuel pressure gauge
•Socket set
•Torque wrench

Parts Required

•Fuel pump (if needed)
•Fuel pump relay (if needed)
•Spark plugs (if needed)
•Ignition coils (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Check the battery voltage with a multimeter to ensure it is within the acceptable range (12.4V or higher).
3
Inspect battery terminals and connections for corrosion or looseness.
4
Test the fuel pump relay for continuity and operation.
5
Verify fuel pressure at the fuel rail using a fuel pressure gauge.
6
Check the ignition system components (spark plugs, ignition coils) for wear or failure.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a flat surface and engage the parking brake.
Disconnect the negative battery terminal to ensure safety.

2. Inspect Battery and Connections

Sub-steps:
1. Remove the battery terminal covers.
2. Clean any corrosion from the terminals using a wire brush.
3. Tighten the battery terminals securely.
4. Reconnect the negative battery terminal.

3. Test and Replace Fuel Pump Relay (if necessary)

Tools Required: Multimeter
Sub-steps:
1. Locate the fuse box and identify the fuel pump relay.
2. Remove the fuel pump relay from the fuse box.
3. Test the relay for continuity using a multimeter.
4. If faulty, replace it with a new relay.

4. Check and Replace Fuel Pump (if necessary)

Tools Required: Fuel pressure gauge, socket set
Sub-steps:
1. Relieve the fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.
2. Disconnect the fuel lines and electrical connectors from the fuel pump.
3. Remove the fuel pump from the fuel tank (follow manufacturer instructions).
4. Install the new fuel pump and reconnect the fuel lines and electrical connectors.
5. Reinstall the fuel pump fuse.

5. Inspect and Replace Ignition Components (if necessary)

Tools Required: Socket set, torque wrench
Sub-steps:
1. Remove the ignition coil(s) from the spark plugs.
2. Inspect the spark plugs for wear; replace if necessary.
3. Check the ignition coils for proper operation; replace if faulty.
4. Reinstall the ignition coils and ensure they are torqued to manufacturer specifications.