TSRM/MK3 Supra/Repair Manual
Repair ManualWiring Diagrams
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FI/EFI System62 / 126
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EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE) — MK3 Supra EFI System, page 62
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FI-62 EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE) No. | Terminals | Trouble | Condition | STD Voltage 7 | STA — E1 | No voltage | Cranking | 6 — 14 V To Circuit Opening Relay (STA) Fusible Link AM1 40A ALT 100A MAIN 2.0L Ignition Switch ST1 Clutch Start Switch (M/T) (Canada A/T) Neutral Start Switch (A/T) (M/T) Starter Relay (M/T, USA A/T) To Theft Deterrent (USA) To Body Ground (Canada) ECU STA Starter E1 Battery Fusible Link AM1 (USA A/T) FJ0131 ① ECU Voltmeter E1 STA FI2768 ① There is no voltage between ECU terminals STA and E1. (IG SW START) Check starter operation. OK | BAD Check wiring between ECU terminal STA and ignition switch terminal ST1. OK | BAD Repair or replace. ② ECU Ohmmeter FI2755 ② Check wiring between ECU terminal E1 and body ground. OK | BAD Try another ECU. | Repair or replace. Check fusible links, battery, wiring, ignition switch and neutral start switch. OK | BAD Repair or replace. ③ Voltmeter Terminal 50 Starter FI6236 ③ Check that there is voltage at terminal 50 of starter. (IG SW START) STD voltage: 6 — 14 V OK | NO Check starter. | Check wiring between ignition switch terminal ST and starter terminal 50.