TSRM/MK2 Supra/Repair Manual
Repair ManualWiring Diagrams
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FI/EFI System28 / 80
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TROUBLESHOOTING WITH VOLT/OHMMETER — MK2 Supra EFI System, page 28
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TROUBLESHOOTING WITH VOLT/OHMMETER PREPARATION FOR TROUBLESHOOTING 1. Remove the glove box door and glove box. 2. Remove the ECU with wire harness. EFI SYSTEM CHECK PROCEDURE NOTE: 1. The EFI circuit can be checked by measuring the resistance and voltage at the wiring connectors of the ECU. 2. Perform all voltage measurement with the connectors connected. 3. Verify that the battery voltage is 11V or above when the ignition switch is ON. Using a voltmeter, measure the voltage at each terminal of the wiring connector. NOTE: If there is any problem, see TROUBLESHOOTING FOR EFI ELECTRONIC CIRCUIT WITH VOLT/ OHMMETER. Connectors of ECU Symbol | Terminal Name | Symbol | Terminal Name | Symbol | Terminal Name E01 | ENGINE GROUND | G/O | ENGINE REVOLUTION SENSOR | A/C | A/C MAGNET SWITCH E02 | ENGINE GROUND | V+ | CHECK CONNECTOR | SPD | SPEEDMETER No.10 | INJECTOR | S | ENGINE REVOLUTION SENSOR | W | WARNING LIGHT No.20 | INJECTOR | T | CHECK CONNECTOR | THA | AIR TEMP. SENSOR STA | STARTER SWITCH | VTA | THROTTLE SWITCH | Vc | AIR FLOW METER IG11 | IGNITER | M | ENGINE REVOLUTION SENSOR | Vs | AIR FLOW METER EGR | EGR VSV | IDL | THROTTLE SWITCH | BAT | BATTERY - B E1 | ENGINE GROUND | KNK | KNOCK SENSOR | IG S/W | IGNITION SWITCH N/C | NEUTRAL START SWITCH (A/T) | IGf | IGNITER | +B | MAIN RELAY | CLUTCH SWITCH (M/T) | Ox | OXYGEN SENSOR | TCD | ECT COMPUTER ISC1 | ISC MOTOR NO.1 COIL | THW | WATER TEMP. SENSOR | OIL | OIL PRESSURE SWITCH ISC2 | ISC MOTOR NO.2 COIL | E2 | SENSOR EARTH | L1 | ECT COMPUTER ISC3 | ISC MOTOR NO.3 COIL | E3 | ENGINE GROUND | L2 | ECT COMPUTER ISC4 | ISC MOTOR NO.4 COIL | M-REL | MAIN RELAY COIL | L3 | ECT COMPUTER F10638