Toyota Starlet Ep91 Wiring Diagram Apr 2026

You dig out a test light—barely brighter than a firefly—and probe the injector connector while your buddy cranks the engine. Nothing. No flash. No pulse.

You pull the glovebox. There it is: a silver finned thing, like a mini heatsink. You test for voltage on the brown wire at the resistor pack input. 12V. Good. Output side to injectors: 0V.

You trace back on the diagram. The light green/red wire doesn’t go straight to the ECU. It goes through a little black box near the strut tower: .

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.

You pop the hood. The 4E-FE engine stares back—1.3 liters of 90s economy engineering. Simple. Mechanical. But underneath that, a spaghetti monster of thin wires snakes across the firewall, wrapped in crumbling electrical tape. Some are blue with a red stripe. Some are black with a yellow stripe. Some are just… gray from age.