TSRM/MK2 Supra/Repair Manual
Repair ManualWiring Diagrams
p.033

FI/EFI System, page 34

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p.035
EFI System — MK2 Supra EFI System, page 34
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Page text (OCR transcript)
• M-REL ↔ E1

① There is no voltage between ECU terminals M-REL and E1.
(IG S/W ON)

② Check that there is voltage between ECU terminal M-REL and body ground. (IG S/W ON)

NO
Check wiring between ECU terminal E1 and body ground.

OK
BAD
Repair or replace

Check NO. 1 main relay and wiring harness.
BAD
Replace

OK
Try another ECU.