TSRM/MK3 Supra/Repair Manual
Repair ManualWiring DiagramsCommunity Fixes
p.065

BE/Body Electrical System, page 66

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p.067
Body Electrical System — MK3 Supra Body Electrical System, page 66
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Page text (OCR transcript)
CONTINUED FROM PREVIOUS PAGE

INSPECT POWER SOURCE
Is there battery voltage between terminal *5 or **1 and body ground?

No → Open circuit in wire harness between terminal *5 or **1 of main switch and terminal 4 of main relay.

Yes ↓

INSPECT SWITCH OPERATION
Is main switch operation normal?
(See page BE-81)

No → Replace main switch.

Yes ↓

COMPUTER

Disconnect connector from computer and inspect connector on wire harness side as follows.

↓

INSPECT GROUND CONNECTION
Is there continuity between terminal 13 and body ground?

No → • Open circuit in wire harness between terminal 13 and body ground.
• Body ground faulty.

Yes ↓

INSPECT POWER SOURCE
Is there battery voltage between terminal 10 and body ground with main switch turned on?

No → Open circuit in wire harness between terminal 10 of computer and terminal 6 of main switch.

Yes ↓

Replace computer.

*: U.S.A. (w/ Airbag system)
**: CANADA (w/o Airbag system)