TSRM/MK2 Supra/Repair Manual
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BE/Body Electrical System — Inspection of Actuator Circuit, page 77

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p.078
Inspection of Actuator Circuit — MK2 Supra Body Electrical System, page 77
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Page text (OCR transcript)
C    INSPECTION OF ACTUATOR CIRCUIT

Turn ignition switch off.

ACTUATOR

INSPECT CABLE FREEPLAY
Is control cable freeplay less than 10 mm
(0.39 in.) ?

No → Adjust control cable freeplay.

Yes ↓

INSPECT ACUTATOR OPERATION
Disconnect connector from actuator.
Inspect actuator operation. (See page BE-84)
Is actuator operation normal ?

No → Replace actuator.

Yes ↓

COMPUTER

INSPECT ACTUATOR CIRCUIT
Is resistance value between computer
terminals correct ?
Between terminals 1 and 2    about 68 Ω
Between terminals 2 and 3    about 30 Ω

No → Open or short circuit in wire harness
between actuator and computer.

Yes ↓

Replace computer.