TSRM/MK3 Supra/Repair Manual
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p.092

BE/Body Electrical System — Inspection of Door Lock Switch Circuit., page 93

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p.094
Inspection of Door Lock Switch Circuit. — MK3 Supra Body Electrical System, page 93
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Page text (OCR transcript)
F    INSPECTION OF DOOR LOCK SWITCH CIRCUIT.

Turn ignition switch off.

COMPUTER.

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

INSPECT LH DOOR LOCK SWITCH CIRCUIT
Close RH front door.
Is there continuity between terminal 7 and
ground with LH front door opened?

No → Open circuit in LH door lock switch
circuit.

↓ Yes

INSPECT RH DOOR LOCK SWITCH CIRCUIT
Close LH front door.
Is there continuity between terminal 7 and
ground with RH front door opened?

No → Open circuit in RH door lock switch
circuit.

↓ Yes

Replace computer.