Toyota 89661 Ecu Pinout -

| Pin | Signal | Notes | |-----|----------------|-------| | D1 | SL1 (Shift solenoid 1) | | | D2 | SL2 (Shift solenoid 2) | | | D3 | SLT (Line pressure solenoid) | | | D4 | SLU (Lock-up solenoid) | | | D5 | OD1 (Overdrive switch input) | | | D6 | OD2 (Overdrive indicator output) | | | D7 | PNP (Park/Neutral position switch) | | | D8 | L (Low position switch) | | | D9 | 2 (Second position switch) | | | D10 | R (Reverse switch input) | | | D11 | NCO (Neutral control output) | For idle control in gear | | D12 | ATF (Transmission fluid temp) | | | D13 | S1 (Speed sensor 1 input) | | | D14 | S2 (Speed sensor 2 input) | | | D15 | L4 (4WD low switch) | SUV models | | D16 | CTRL (Center diff lock control) | | | D17-20 | Spare/Not used | |

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), forums such as Lextreme are the primary source for cross-referencing rare 28-pin or 34-pin connector configurations. Common 89661 ECU Pinout Variants Model Example Part Number Prefix Notable Pin Configuration Lexus LS400 (1UZ-FE) 89661-50xxx Often uses a 34-22-16-28 pin layout. Toyota Corolla (1ZZ-FE) 89661-02xxx Standard multi-connector OBD2 era layout. Toyota Corolla (1ZR) 89661-12xxx Focuses on D166104 component testing. Practical Tip: Capacitor Leaks toyota 89661 ecu pinout

: Water (coolant) and Intake Air temperature sensor signals. | Pin | Signal | Notes | |-----|----------------|-------|

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These standard Toyota abbreviations are typically found on the internal circuit board or in wiring manuals: Power & Ground: : Switched +12V power from the EFI main relay. : Constant +12V battery power for memory. : Switched ignition power. E01 / E02 / E1 : Main ECU grounds. : Sensor ground return. : 5V reference output for sensors (TPS, MAP). Engine Signals: #10, #20, #30, #40 : Fuel injector drive signals. IGT / IGT1-6 : Ignition timing signals sent to the igniter. : Ignition confirmation signal from the igniter. NE / NE+ / NE- : Crankshaft position sensor signal. G1 / G2 / G- : Camshaft position sensor signals. Sensor Inputs: : MAP or MAF sensor input. : Engine coolant temperature (ECT) sensor input. : Intake air temperature (IAT) sensor input. : Throttle position sensor (TPS) and idle switch signals. OX / OX1 / OX2 : Oxygen sensor inputs. Example Pinout Configurations

| Pin | Signal | Notes | |-----|----------------|-------| | C1 | CANH (CAN High) | OBD-II diagnostics | | C2 | CANL (CAN Low) | | | C3 | SIL (Serial data link) | Toyota proprietary | | C4 | TXCT (Transmit to diagnostic tool) | | | C5 | RXCT (Receive from diagnostic tool) | | | C6 | W (Warning light – MIL) | | | C7 | TACH (Tachometer output) | To cluster or diagnostic connector | | C8 | VSS (Vehicle speed output) | 4-pulse per revolution | | C9 | PSCT (Power steering signal) | Idle-up input | | C10 | STP (Stop lamp switch) | Brake pedal input | | C11 | IMI (Immobilizer signal) | From transponder key amplifier | | C12 | CODE (Immobilizer code line) | | | C13 | K-LINE (ISO 9141-2) | Older diagnostic | | C14 | L-LINE | | | C15 | IG+ (Ignition switch +12V) | Main ECU power | | C16 | E (Sensor ground return) | |