TSRM/MK3 Supra/Repair Manual
Repair ManualWiring DiagramsCommunity Fixes
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FI/EFI System, page 63

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EFI System — MK3 Supra EFI System, page 63
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Page text (OCR transcript)
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