TSRM/MK3 Supra/Repair Manual
Repair ManualWiring Diagrams
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FI/EFI System52 / 126
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EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE) — MK3 Supra EFI System, page 52
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FI-52 EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE) No. Terminals Trouble Condition STD Voltage 1 BATT — E1 No voltage Ignition switch ON 10 ~ 14 V IG SW — E1 No voltage Ignition switch ON 10 ~ 14 V M-REL — E1 No voltage Ignition switch ON 10 ~ 14 V +B(+B1) — E1 No voltage Ignition switch ON 10 ~ 14 V ECU BATT EFI Main Relay +B Fusible Link Fuse +B1 AM2 30A EFI 15A M-REL Fusible MAIN 2.0L Link Ignition Switch Fuse AM2 IG2 IGN 7.5A IG SW Battery E1 FI3610 BATT - E1 ECU 1 Voltmeter There is no voltage between ECU terminals BATT and E1. E1 BATT Check that there is voltage between ECU terminal BATT and body 2 ground. NO OK FI2753 Check wiring between ECU terminal E1 and body 3 ground. ECU 2 OK BAD Voltmeter Try another ECU. Repair or replace. BATT E1 BAD Check fuse and fusible links. Replace. FI2754 OK BAD Check wiring between ECU Repair or replace. terminal and battery. ECU 3 Ohmmeter E1 FI2755