TSRM/MK2 Supra/Repair Manual
Repair ManualWiring Diagrams
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BE/Body Electrical System — Inspection of Source Circuit, page 90

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p.091
Inspection of Source Circuit — MK2 Supra Body Electrical System, page 90
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Page text (OCR transcript)
A    INSPECTION OF SOURCE CIRCUIT

Turn ignition switch on.

Is DOME fuse normal?

No → Replace fuse.
Is operation normal?

No → Short circuit in wire harness between fuse and terminal 5 of computer.

Yes

Yes → Fuse faulty

Is C/G fuse normal?

No → Replace fuse.
Is operation normal?

No → Short circuit in wire harness between fuse and terminal 4 of computer.

Yes

Yes → Fuse faulty

BACK DOOR S/W

INSPECT GROUND CONNECTION
Is there continuity between back door switch body and body ground?

No → Body ground faulty.

Yes

INSPECT BACK DOOR SWITCH OPERATION
Is there continuity between terminal 1 and body ground with back door switch turned on?

No → Inspect back door switch.

Yes

BACK DOOR
KEY S/W

INSPECT GROUND CONNECTION
Is there continuity between terminal 3 and body ground?

No → • Open circuit in wire harness between terminal 3 and body ground.
• Body ground faulty.

Yes

CONTINUED ON NEXT PAGE