89661 - 35050
: Water (coolant) and Intake Air temperature sensor signals. toyota 89661 ecu pinout
This is a technical request regarding the series ECU (Engine Control Unit). The number 89661 is Toyota’s part number prefix for engine ECUs, but it is not a single pinout . It covers hundreds of different models (Camry, Corolla, Land Cruiser, Lexus, etc.) across OBD-I, OBD-II, JDM, and USDM variants. 89661 - 35050 : Water (coolant) and Intake
| Pin | Typical Signal | Notes | |-----|----------------|-------| | A1 | IGT1 (Ignition timing signal 1) | To igniter | | A2 | IGT2 | | | A3 | IGT3 (if V6) | | | A4 | IGT4 (if V6) | | | A5 | IGF (Ignition confirmation) | From igniter | | A6 | NE+ (Crankshaft position sensor +) | Variable reluctance | | A7 | NE- (Crankshaft position sensor -) | | | A8 | G2+ (Camshaft position sensor) | | | A9 | G2- | | | A10 | THW (Engine coolant temp) | Analog input | | A11 | THA (Intake air temp) | Analog input | | A12 | VTA1 (Throttle position sensor) | Analog 0-5V | | A13 | VTA2 (TPS sub) | Redundant signal | | A14 | E2 (Sensor ground) | Common ground | | A15 | VC (Vref – 5V output) | To TPS, MAP, etc. | | A16 | KNK1 (Knock sensor 1) | | | A17 | KNK2 (Knock sensor 2) | V6 only | | A18 | OX1 (Front O2 sensor) | 0-1V or wideband | | A19 | OX2 (Rear O2 sensor) | | | A20 | STA (Starter signal input) | From ignition switch | | A21 | NSW (Neutral start switch) | Park/Neutral position | | A22 | SPD (Vehicle speed signal) | From speed sensor or ABS | | A23 | AC1 (A/C request) | | | A24 | ACMG (A/C magnetic clutch relay) | Output | | A25 | ELS (Electrical load signal) | Alternator load | | A26 | BATT (Battery backup) | Constant +12V for memory | It covers hundreds of different models (Camry, Corolla,
If you are using a pinout to solve a "No Start" condition, check these three pins in order: