Using the TSRM and TEWD conventions for numbering pins, these are the three connectors on the pre-1989 “yellow plug” ECU for a manual transmission. This is not a change from the original configuration. It is only a documentation correction to make things easier for me to use. The Toyota documentation numbers pins left to right and top to bottom. Commonly published 3rd party documentation does not follow the Toyota convention.
Pin # Symbol Terminal 1 E01 POWER GROUND 2 No. 10 INJECTOR (No. 1 and 4) 3 STA STARTER SWITCH 4 STJ COLD START INJECTOR 5 * N/C CLUTCH SWITCH (M/T) 6 E02 POWER GROUND 7 No. 20 INJECTOR (No. 2 and 6) 8 No. 30 INJECTOR (No. 3 and 5) 9 E1 COMPUTER GROUND 10 IGdB IGNITER * For cruise Control << Don’t understand why N/C as we have Cruise Control
Pin # Symbol Terminal 1 ISC1 ISC MOTOR NO. 1 COIL 2 ISC2 ISC MOTOR NO. 2 COIL 3 G- CAM POSITION SENSOR 4 G1 CAM POSITION SENSOR 5 G2 CAM POSITION SENSOR 6 Ne CAM POSITION SENSOR 7 IG1 IGNITER 8 IGf IGNITER 9 THW WATER TEMP. SENSOR 10 ISC3 ISC MOTOR NO. 3 COIL 11 ISC4 ISC MOTOR NO, 4 COIL 12 Vf CHECK CONNECTOR 13 T CHECK CONNECTOR 14 VTA THROTTLE POSITION SENSOR 15 IDL THROTTLE POSITION SENSOR 16 IGdA IGNITER 17 KNK1 KNOCK SENSOR 18 KNK2 KNOCK SENSOR
Pin # Symbol Terminal 1 Ox OXYGEN SENSOR 2 VSV2 VSV (FPU) 3 HT OXGEN SENSOR 4 M-REL EF| MAIN RELAY (COIL) 5 EGR VSV (EGR) 6 SPD SPEEDOMETER 7 Fp FUEL PUMP RELAY 8 THA AIR TEMP SENSOR 9 HAC ALTITUDE COMPENSATION SENSOR 10 Vc AIR FLOW METER 11 Batt BATTERY 12 IG S/W IGNITION SWITCH 13 E2 SENSOR GROUND 14 L1 ECT COMPUTER 15 L2 ECT COMPUTER 16 L3 ECT COMPUTER 17 A/C A/C MAGNETIC SWITCH 18 W WARNING LIGHT 19 OIL OIL PRESSURE SWITCH 20 ECT ECT COMPUTER 21 Fc CIRCUIT OPENING RELAY 22 Ks AIR FLOW METER 23 +B EFI MAIN RELAY 24 +B1 EFI MAIN RELAY I find no place for the NSW as this is a Manual Transmission ECU NSW NEUTRAL START SWITCH (A/T) The following connector exists in the harness but does not connect to the ECU Pin # Symbol Terminal xx TIL TURBO INDICATOR xx DFG DEFOGGER RELAY xx LP HEADLIGHT RELAY The 4th yellow connector with the flying lead will not be used.