Red Seal Automotive Service Technician Practice Exam

What is the first step to troubleshoot an engine that won’t start?

1. Inspect the exhaust system

2. Check battery charge

3. Test the fuel injector

4. Inspect tire pressure

The correct answer is: Check battery charge

The first step in troubleshooting an engine that won’t start is to check the battery charge. A dead or weak battery is one of the most common reasons for a vehicle not starting, as it supplies the necessary voltage to engage the starter motor. If the battery does not have enough charge, the engine will not crank, making this the most logical initial step. By checking the battery charge, you can quickly assess whether the starting issue stems from a lack of electrical power. If the battery is fully charged and functioning correctly, you can move on to other potential issues, such as fuel delivery or ignition problems, but starting with the battery ensures you address the most frequent culprit first.