Toyota 89661 Ecu Pinout [NEW]

A signal wire that tells the ECU the ignition key has been turned to the "ON" position. 2. Ground Pins

| | Symbol | Wire Color | Description | | :--- | :--- | :--- | :--- | | Connector Y (22-pin) | | 22 | BATT | R-W | Battery +12V | | 21 | | | | | 20 | | | | | 19 | | | | | 18 | | | | | 17 | W | W | Check Engine Light | | 16 | FPR | L-Y | Fuel Pressure Regulator VSV | | 15 | | | | | 14 | | | | | 13 | | | | | 12 | L | L | Idle switch signal | | 11 | P | P | Neutral start switch (A/T) | | 10 | NSW | B-R | Park/Neutral Position Switch | | 9 | +B | B-R | +12V from EFI Main Relay | | 8 | STA | R-B | Starter signal | | 7 | | | | | 6 | ACT | LG-B | A/C amplifier signal | | 5 | L1 | G-O | Lock-up solenoid (A/T) | | 4 | VF | R-W | Diagnostic test signal | | 3 | ACC | G-R | A/C cut relay signal | | 2 | S2 | | Shift solenoid #2 (A/T) | | 1 | S1 | | Shift solenoid #1 (A/T) | | Connector X (26-pin) | | 15 | G2 | | Distributor pickup #2 | | 14 | G1 | | Distributor pickup #1 | | 13 | | | | | 12 | | | | | 11 | | | | | 10 | | | | | 9 | | | | | 8 | G- | | Distributor pickup ground | | 7 | NE | | Distributor NE (360° signal) | | 6 | HT | R-B | Oxygen sensor heater | | 5 | | | | | 4 | | | | | 3 | VTA | R | TPS signal | | 2 | VC | Y-B | +5V sensor power | | 1 | E2 | BR | Sensor ground | | Connector Z (16-pin) | | 16 | OX | B | Oxygen sensor signal | | 15 | E1 | BR-B | Engine ground | | 14 | E01 | BR | Power ground | | 13 | E02 | BR | Power ground | | 12 | | | | | 11 | | | | | 10 | EVP | | EGR Vacuum VSV | | 9 | | | | | 8 | | | | | 7 | | | | | 6 | | | | | 5 | IGF | B-Y | Igniter confirmation signal | | 4 | IGT | B | Ignition timing signal | | 3 | THW | W | Coolant temperature sensor | | 2 | #30 | | Fuel injectors #1, #3 (group 1) | | 1 | #20 | | Fuel injectors #2, #4 (group 2) |

This comprehensive guide breaks down how to identify your specific 89661 ECU, understand core pin definitions, and safely navigate the wiring process. 1. Decoding the Toyota 89661 Part Number toyota 89661 ecu pinout

The full Toyota part number follows a 89661-XXXXX format. The five digits after the hyphen dictate the exact board layout, vehicle model, and engine variant.

5V reference power output clean-regulated by the ECU to power the TPS and MAP/MAF sensors. A signal wire that tells the ECU the

Sensor ground returns (isolated from chassis ground to prevent electrical noise).

89661 - 35050

Ignition Feedback signal. The igniter sends this back to the ECU to confirm a spark occurred. Crucial Note: If the ECU does not receive the IGF signal, it will cut fuel injection after roughly 3 seconds as a safety mechanism. Sensor Inputs

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. 5V reference power output clean-regulated by the ECU