my Toyota Corolla E170 (2013-2019) won’t start in cold weather, what could be the cause?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

574 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 cold weather for 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 battery before working on electrical systems
•Allow engine to cool before inspecting the coolant system

Symptoms

•Engine cranks but does not start
•Check engine light illuminated
•Weak or slow cranking
•Battery warning light on the dashboard
•Fuel smell near the engine
•Increased engine noise during cranking

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored diagnostic trouble codes (DTCs)
2
Check the battery voltage and health with a multimeter; ensure it is above 12.4 volts
3
Inspect battery terminals for corrosion and ensure they are tightly connected
4
Test the starter motor operation by bypassing the ignition circuit
5
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning
6
Inspect the engine coolant temperature sensor for proper operation and readings

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
•Wire brush
•Jumper wire

Parts Required

•New battery (if needed)
•Fuel filter (if pressure is low)
•Engine coolant temperature sensor (if faulty)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored diagnostic trouble codes (DTCs)
2
Check the battery voltage and health with a multimeter; ensure it is above 12.4 volts
3
Inspect battery terminals for corrosion and ensure they are tightly connected
4
Test the starter motor operation by bypassing the ignition circuit
5
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning
6
Inspect the engine coolant temperature sensor for proper operation and readings

Solution

1. Preparation

Gather tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is off.
Disconnect the negative terminal from the battery to prevent electrical shock.

2. Battery Inspection and Replacement

Check Battery Health
- Use a multimeter to measure the battery voltage.
- If the voltage is below 12.4 volts, proceed to charge or replace the battery.
Clean Battery Terminals
- Remove the positive and negative terminals.
- Clean any corrosion using a wire brush and a solution of baking soda and water.
- Reconnect the terminals firmly.
Replace Battery (if necessary)
- If the battery is defective, replace it with a new one that meets specifications (typically a Group 35 for this model).
- Secure the new battery and reconnect the terminals.

3. Starter Motor Check

Bypass Ignition Circuit
- Use a jumper wire to connect the positive battery terminal to the starter motor solenoid terminal.
- If the starter motor engages, the issue may lie in the ignition circuit or relay.

4. Fuel System Inspection

Check Fuel Pressure
- Connect a fuel pressure gauge to the fuel rail.
- Turn the ignition to the "On" position (without starting the engine) and check pressure.
- Ensure it meets specifications (typically around 43-50 psi for this model).
- If low, inspect the fuel pump and filter.

5. Engine Coolant Temperature Sensor Test

Inspect Sensor Operation
- Locate the engine coolant temperature sensor.
- Use a multimeter to measure resistance and compare with manufacturer specifications.
- Replace the sensor if readings are out of range.