Toyota 4afe Ecu Pinout (2024)

One of the 4A-FE’s clever features is its (FC or FPR pin). The ECU grounds this pin only when it sees a cranking or running RPM signal. This safety feature cuts power to the fuel pump if the engine stalls while the ignition is on—a critical detail that the pinout makes clear. Without knowing that FC pin is a ground-side switch, a novice might wrongly condemn a fuel pump.

Diagnostic test terminals (used with E1 to read CEL codes). VF1: Oxygen sensor voltage feedback for monitoring. STA: Starter signal (tells ECU engine is cranking). Wiring & Diagnostic Notes Corolla 4AfE 1 6 Ecu Pinout PDF - Scribd toyota 4afe ecu pinout

The 4AFE engine is a 1.6-liter inline-four cylinder engine produced by Toyota from 1985 to 1992. It's commonly found in various Toyota models, such as the Corolla AE86, Sprinter Trueno, and MR2. One of the 4A-FE’s clever features is its (FC or FPR pin)

Constant power from the EFI main relay to maintain ECU memory. Without knowing that FC pin is a ground-side

For those performing a 2nd Gen 4A-FE swap , specific colors and pin assignments are vital for a successful "wire-up":

: Verify 12V at the +B terminal and check that the STA (Starter Signal) pin receives voltage during cranking.