TSRM/MK3 Supra/Repair Manual
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p.048

FI/EFI System — Troubleshooting with VOLT/OHMMETER (7M-GTE), page 49

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p.050
Troubleshooting with VOLT/OHMMETER (7M-GTE) — MK3 Supra EFI System, page 49
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Page text (OCR transcript)
HINT: The following troubleshooting procedures are for designed for those who suspect the system, therefore the procedure may vary somewhat. However, troubleshooting should be performed referring to the inspection methods described in this manual.

Before beginning inspection, it is best to first make a simple check of the fuses, fusible links and condition of the connectors.

The following troubleshooting procedures are based on the supposition that the trouble lies in the short or open circuit in a component outside the computer or a poor connection in the connector.

If engine check occurs even though proper operation is connected to the computer connector, then it can be assumed the computer is faulty and should be replaced.

LOCATION OF FUSES AND FUSIBLE LINKS

No. 1 Junction Block
Fuse
GAUGE 7.5A
Fuse
IGN 7.5 A

Fusible Link
AM1 40A
EFI Main Relay

Fusible Link
ALT 100A

Fusible Link
2.0L

No. 2
Junction Block

Fusible Link
AM2 30A
Fuse
EFI 15A