Toyota 4afe Ecu Pinout [top] Jun 2026
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Eigentlich wollte ich nur ein Bild bei Kindle Create einfügen. Meine Freundin Melisande hatte mich gebeten, ihr bei der Formatierung ihres ersten Cozy-Fantasy-Romans Der verbotene Frühling zu helfen, weil Kindle Create bei ihr hartnäckig „Das eingefügte Bild ist ungültig oder beschädigt“ meldete. Bei mir funktionierte es. Zunächst. Später, beim Einfügen des besagten Bildes, plötzlich auch nicht mehr. Die Lösung war weder magisch noch sonderlich kompliziert – aber sie hat lange genug auf sich warten lassen, um diesen Blogpost zu rechtfertigen. Vielleicht erspart dir dieses kleine Kindle Create Tutorial ja ein paar Nerven.
Constant power from the EFI main relay to maintain ECU memory.
A highly regulated +5V output from the ECU used to power the MAP sensor and Throttle Position Sensor (TPS).
The Toyota 4A-FE engine is one of the most reliable inline-four powerplants ever built. Produced from 1987 to 2001, this 1.6-liter, 16-valve DOHC engine powered millions of vehicles globally, including the Corolla, Celica, and Carina.
: THW (Coolant Temp), THA (Intake Air Temp), PIM (Manifold Pressure/MAP), and OX (Oxygen Sensor).
The ECU grounds this pin to illuminate the malfunction indicator light on the instrument cluster.
These pins supply the ECU with electricity and complete the circuit loop back to the chassis.
Narrow-angle cylinder head, often used a Manifold Absolute Pressure (MAP) sensor or Vane Air Flow (VAF) meter depending on the region.
| 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 |
| Pin | Wire Color | Signal Name | Function & Notes | |-----|------------|--------------|--------------------| | 1 | Green-Red | PSPS (Power Steering Pressure) | 12V when steering load is high. | | 2 | Red-Black | NSS (Neutral Start Switch) | Ground in P/N for automatic. | | 3 | Yellow-Blue | SPD (Vehicle Speed Sensor) | 4-pulse per rotation signal from combination meter. | | 4 | Blue-White | O2 (Oxygen Sensor) | 0.1–0.9V fluctuating signal. | | 5 | Red-Yellow | HT (O2 Heater Control) | ECU grounds heater after warmup. | | 6 | (Not used) | - | - | | 7 | Green-White | ACT (Intake Air Temp) | Similar to THW but for IAT sensor in air cleaner. | | 8 | (Not used) | - | - | | 9 | Purple | +BM (Backup Power) | Constant 12V for diagnostic memory. | | 10 | Pink | NSW (Neutral Start Signal) | Used for idle-up during P/N. | | 11 | Light Green-Black | IDL2 (Closed Throttle 2) | Confirms idle position for A/C cut. | | 12 | Gray-Red | VF (Voltage Feedback) | To diagnostic port – shows O2 rich/lean status. | | 13 | Yellow-White | ELS (Electric Load Signal) | 12V when rear defogger or lights on. | | 14 | Black-Pink | CAN (Not used on 4AFE) | - | | 15 | Brown | TE2 (Diagnostic for Traction) | Rarely used on FWD 4AFE. | | 16 | Gray-Black | T (Transmission Control) | To TCM on automatic cars. |
If you own a 1996-1998 Corolla, the pinout changes to 2 round 28-pin connectors. Here are the critical differences:
– Especially pin A11 (G-) and A12 (IGt). The distributor signal wires become brittle near the ECU plug.
This connector focuses on sensor inputs and reference voltages.
Pin numbering is usually read Left to Right, Top to Bottom.
Viele Grüße
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Ich bin Catrina Seiler, Autorin und Bloggerin. Hier findest du Artikel rund ums Schreiben und Veröffentlichen, und wenn du lieber Geschichten liest als über sie nachzudenken, auch meine Romane.
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Toyota 4afe Ecu Pinout [top] Jun 2026
Constant power from the EFI main relay to maintain ECU memory.
A highly regulated +5V output from the ECU used to power the MAP sensor and Throttle Position Sensor (TPS).
The Toyota 4A-FE engine is one of the most reliable inline-four powerplants ever built. Produced from 1987 to 2001, this 1.6-liter, 16-valve DOHC engine powered millions of vehicles globally, including the Corolla, Celica, and Carina.
: THW (Coolant Temp), THA (Intake Air Temp), PIM (Manifold Pressure/MAP), and OX (Oxygen Sensor). toyota 4afe ecu pinout
The ECU grounds this pin to illuminate the malfunction indicator light on the instrument cluster.
These pins supply the ECU with electricity and complete the circuit loop back to the chassis.
Narrow-angle cylinder head, often used a Manifold Absolute Pressure (MAP) sensor or Vane Air Flow (VAF) meter depending on the region. Constant power from the EFI main relay to
| 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 |
| Pin | Wire Color | Signal Name | Function & Notes | |-----|------------|--------------|--------------------| | 1 | Green-Red | PSPS (Power Steering Pressure) | 12V when steering load is high. | | 2 | Red-Black | NSS (Neutral Start Switch) | Ground in P/N for automatic. | | 3 | Yellow-Blue | SPD (Vehicle Speed Sensor) | 4-pulse per rotation signal from combination meter. | | 4 | Blue-White | O2 (Oxygen Sensor) | 0.1–0.9V fluctuating signal. | | 5 | Red-Yellow | HT (O2 Heater Control) | ECU grounds heater after warmup. | | 6 | (Not used) | - | - | | 7 | Green-White | ACT (Intake Air Temp) | Similar to THW but for IAT sensor in air cleaner. | | 8 | (Not used) | - | - | | 9 | Purple | +BM (Backup Power) | Constant 12V for diagnostic memory. | | 10 | Pink | NSW (Neutral Start Signal) | Used for idle-up during P/N. | | 11 | Light Green-Black | IDL2 (Closed Throttle 2) | Confirms idle position for A/C cut. | | 12 | Gray-Red | VF (Voltage Feedback) | To diagnostic port – shows O2 rich/lean status. | | 13 | Yellow-White | ELS (Electric Load Signal) | 12V when rear defogger or lights on. | | 14 | Black-Pink | CAN (Not used on 4AFE) | - | | 15 | Brown | TE2 (Diagnostic for Traction) | Rarely used on FWD 4AFE. | | 16 | Gray-Black | T (Transmission Control) | To TCM on automatic cars. |
If you own a 1996-1998 Corolla, the pinout changes to 2 round 28-pin connectors. Here are the critical differences: Produced from 1987 to 2001, this 1
– Especially pin A11 (G-) and A12 (IGt). The distributor signal wires become brittle near the ECU plug.
This connector focuses on sensor inputs and reference voltages.
Pin numbering is usually read Left to Right, Top to Bottom.
Danke! Ich hoffe ja, dass er ein wenig hilft, wenn jemand beim Bilder einfügen die gleiche Fehlermeldung bekommt 😉