TSRM/MK3 Supra/Repair Manual
Repair ManualWiring Diagrams
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FI/EFI System63 / 126
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EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE) — MK3 Supra EFI System, page 63
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EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE) FI-63 No. | Terminals | Trouble | Condition | STD Voltage 8 | IGT — E1 | No voltage | Idling | 0.7 — 1.0 V [DIAGRAM: Circuit diagram showing Battery, MAIN 2.0L Fusible Link, AM2 30A, Ignition Switch with AM2 and IG2, ECU with connections to Tachometer, Igniter, IGF, IGT, and E1, with ground connections] FI0814 [DIAGRAM 1: ECU connector diagram showing Voltmeter connected to IGT and E1 terminals] 1. There is no voltage between ECU terminals IGT and E1. (Idling) 2. Check that there is voltage between ECU terminal IGT and body ground. (Idling) NO | OK 3. Check wiring between ECU terminal E1 and body ground. | BAD | Repair or replace. OK Try another ECU. FI2770 [DIAGRAM 2: ECU connector diagram showing Voltmeter connected to IGT terminal and ground] Check fusible links and ignition switch. | BAD | Repair or replace. OK Check cam position sensor. | BAD | Repair or replace. OK Check wiring between ECU and battery. | BAD | Repair or replace. OK Check igniter. | BAD | Repair or replace. FI2771 [DIAGRAM 3: ECU connector diagram showing Ohmmeter connected to E1 terminal and ground] FI2754