In the video below, we demonstrate how to test the distributor, ignition coil, and igniter of a Toyota 3AU engine. You’ll learn the correct wiring setup for this Toyota 3AU ignition test, with a simple diagram to help you follow along. See how the ignition system works — live and in action!
toyota 3au ignition test – what to expect
If you’re troubleshooting ignition problems on a Toyota engine with a 3AU distributor, this video is for you! We’ll be testing a Toyota 3AU distributor, ignition coil, and igniter, showing how the system functions and the proper wiring setup needed for testing. This Toyota 3AU ignition test includes a wiring diagram to help you understand the connections. Watch the full test in action!
For more in-depth diagnostic tutorials like this, check out our Automotive Parts Testing section — it’s packed with guides on testing essential vehicle components.
Live Test & Expected Results
Once the wiring is set up, you can perform the Toyota 3AU ignition test by spinning the distributor manually or cranking the engine (if installed).
What You Should See in a Working System:
✔️ A strong, consistent spark at the spark plug when the distributor spins.
✔️ The ignition coil should properly charge and discharge voltage.
✔️ No intermittent misfires or weak sparks.
Signs of a Failing Ignition Coil or Distributor:
❌ No spark at all – Could be a dead coil, faulty igniter, or bad wiring.
❌ Weak or irregular sparks – Might indicate a failing coil or igniter.
❌ Sparks but no engine start – Other ignition or fuel system issues may be present.
Performing a Toyota 3AU ignition test on the distributor, igniter, and ignition coil is a straightforward process if you have the right setup. By following the correct wiring diagram and running a live test, you can diagnose potential ignition problems before replacing any parts unnecessarily.
If you’re looking to keep your vehicle in top shape beyond the ignition system, don’t miss our Car Maintenance Tips for practical advice on everyday upkeep and troubleshooting.
Where to Get Quality Ignition Parts
If you’re looking for reliable surplus ignition and electrical components, Laguna Surplus Trading offers a selection of imported Japanese distributors, ignition coils, igniters and other automotive parts. Contact us for inquiries or visit our website to explore our inventory. 🚗🔧
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