TSRM/MK2 Supra/Repair Manual
Repair ManualWiring Diagrams
p.059

BE/Body Electrical System, page 60

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p.061
Body Electrical System — MK2 Supra Body Electrical System, page 60
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Page text (OCR transcript)
(d) Ground the connector of the sender gauge with the
    connector disconnected.
(e) Check that the top segment flashes with the ignition
    switch at ON position.

2. INSPECT SENDER GAUGE OPERATION
   Inspect the resistance between the terminals of the sender
   gauge and body ground.
   Resistance: 192 — 320 Ω  50°C (122°F)
               65 —  89 Ω  80°C (176°F)