Toyota 4afe Ecu Pinout __hot__ Access
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| Pin | Wire Color | Signal Name | Function | | :--- | :--- | :--- | :--- | | | White | IGT | Ignition Timing Signal (from ECU to igniter) | | B02 | Red/White | #10 | Fuel Injector Cylinder #1 | | B03 | Blue | #20 | Fuel Injector Cylinder #2 | | B04 | Yellow | #30 | Fuel Injector Cylinder #3 | | B05 | Brown | #40 | Fuel Injector Cylinder #4 | | B06 | Black/Yellow | FC | Circuit Opening Relay (Fuel Pump Control) | | B07 | Light Green | VSV (CC) | Charcoal Canister Purge VSV | | B08 | - | - | Empty | | B09 | Red/White | +BM | Backup power for ECU memory (constant 12V) | | B10 | Black/Orange | W | Check Engine Light (MIL) Control | | B11 | Blue/White | ACT | Air Conditioning Switch Signal (to ECU) | | B12 | Red/Black | ACMG | A/C Compressor Magnetic Clutch Relay | | B13 | Black | E1 | Sensor Ground (shared with TPS, MAP, etc.) | | B14 | Black/White | E03 | Injector Power Ground | | B15 | Black/White | E04 | Injector Power Ground | | B16 | - | TE1 | Diagnostic Jumper Pin (for flashing CEL codes) | toyota 4afe ecu pinout
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| Pin | Signal | Wire Color | Description | | :--- | :--- | :--- | :--- | | B-2 | PIM | Light Green/Red | Manifold Absolute Pressure (MAP) Sensor Signal | | B-4 | THW | (varies) | Engine Coolant Temperature (ECT) Sensor Signal | | B-6 | VTA | Light Green | Throttle Position Sensor (TPS) Signal | | B-9 | E2 | Brown | Sensor Ground (shared by MAP, ECT, TPS, etc.) | | B-11 | VTA | Light Green | Alternative TPS Signal | Can’t copy the link right now
Because the 4A-FE engine spans from the late 1980s to the early 2000s, its ECU configuration evolved from older 2-plug or 3-plug OBD-1 formats to modern OBD-2 infrastructure. This comprehensive article outlines the core pin definitions, system wiring structures, and diagnostic procedures required to successfully handle a 4A-FE ECU. 1. Understanding 4A-FE ECU Connector Generations
Count the flashes of the Check Engine Light on the dashboard to determine the fault code. Backprobing Key Pins for Faults