my Toyota Corolla E140 (2006-2013) won’t start but battery is fine what to check

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Check Fuel System

• Fuel Pump Relay and Fuse:

  • Locate the fuse box and identify the fuel pump fuse.
  • Remove the fuse and inspect it for continuity; replace if blown.
  • Check the fuel pump relay by swapping it with a similar relay in the fuse box (if available).

• Fuel Pressure Check:

  • Connect a fuel pressure gauge to the fuel rail service port.
  • Turn the ignition key to the "ON" position (do not start) and check the pressure reading.
  • If the pressure is below specifications (typically around 40-50 PSI for Corolla), the fuel pump may need replacement.

3. Inspect Ignition System

• Spark Check:

  • Remove one spark plug wire and connect a spark tester.
  • Crank the engine and observe if there is a spark; replace the ignition coil if no spark is detected.

• Crankshaft Position Sensor:

  • Locate the crankshaft position sensor (usually near the crankshaft pulley).
  • Inspect the wiring and connections for damage.
  • Use a multimeter to check the resistance of the sensor; replace if out of specification.

4. Check Starter Motor

• Inspect the starter motor and its connections.
• Use a multimeter to test the voltage at the starter terminal when the key is turned to "start."
• If no voltage is detected, trace back to the ignition switch or neutral safety switch for issues.