Toyota Starlet Ep91 Wiring Diagram Apr 2026

Pin 16 → Light Green/Red → Injector #1. That’s interesting. No pulse?

You’d walked past that relay ten times today, assuming it was fine because you heard click . But the diagram shows something subtle: the EFI relay has two outputs. One powers the ECU. The other powers the injectors and fuel pump via a .

It’s yours. And it won’t start. The engine turns over— chug-chug-chug —but no fire. You’ve checked the basics: fuel pump primes, there’s oil, the battery terminals aren’t corroded to hell. But when you pull a spark plug, it’s dry as a desert and bone white. Toyota Starlet Ep91 Wiring Diagram

The fuel pump primes. The ECU powers on (check engine light works). But the injectors are dead. The diagram shows a single brown wire from the EFI relay output to the injector resistor pack (on the passenger side, under the dash, hidden behind the glovebox you’ve never opened).

The title page reads: .

Pin 7 on the ECU connector (E5, gray, 22 pins, top row) → Yellow/Black wire → Goes to the ignition coil negative terminal. That’s your tach signal, not your problem. Good.

Your buddy turns the key. The engine catches on the third crank, stumbles, then smooths out to a lumpy idle. Exhaust smells like a chemistry experiment, but you don’t care. Pin 16 → Light Green/Red → Injector #1

But for now, you just sit in the driver’s seat, let the engine warm up, and listen to that little 1.3L hum. It’s not fast. It’s not pretty. But it’s yours—and you read its language now. Ten years later, you own a laptop with full EWDs for every Toyota from 1985 to 2005. But when someone asks for an EP91 diagram, you still think of that coffee-stained printout, a 10mm socket, and a humid Saturday afternoon that taught you more about patience than any car ever would.

You start tracing.