TSRM/MK2 Supra/Repair Manual
Repair ManualWiring Diagrams
p.099

BE/Body Electrical System, page 100

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p.101
Body Electrical System — MK2 Supra Body Electrical System, page 100
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Page text (OCR transcript)
BE-100			BODY ELECTRICAL SYSTEM — Theft Deterrent System

Diode (For RH Key Unlock Switch and Horn)

INSPECTION OF DIODE

INSPECT DIODE CONTINUITY
(a) Connect the test leads of the ohmmeter to terminals 1 and 2, and check for continuity. Next, reverse the test leads and check, again, for continuity.

If both of the test results are same condition, replace the diode.

(b) Connect the test leads of the ohmmeter to terminals 2 and 3, and check for continuity. Next, reverse the test leads and check, again, for continuity.

If both of the test results are same condition, replace the diode.

Headlight Control Relay
(See page BE-14)

Taillight Control Relay
(See page BE-14)

Key Unlock Switch
(See page BE-67)

Theft Deterrent Horn

INSPECTION OF THEFT DETERRENT HORN

INSPECT HORN OPERATION
Connect the positive (+) lead from the battery to terminal 1. Connect the negative (—) lead to terminal 2.
Check that the horn blows.

If operation is not as specified, replace the horn.

Door Lock Solenoid
(See page BE-68)