TSRM/MK2 Supra/Repair Manual
Repair ManualWiring Diagrams
p.074

BE/Body Electrical System, page 75

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p.076
Body Electrical System — MK2 Supra Body Electrical System, page 75
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Yes

INSPECT CLUTCH SWITCH CIRCUIT (M/T)
Is there continuity between terminal 11 and body ground with clutch pedal returned?

Yes → • Short circuit in wire harness between terminal 11 of computer and terminal 3 of clutch switch.
• Inspect clutch switch.

No ↓

INSPECT NEUTRAL START SWITCH CIRCUIT (A/T)
Is there battery voltage between terminal 11 and body ground when shifting except to "N" range?

Yes → • Short circuit in wire harness between terminal 11 of computer and terminal 3 of neutral start switch.
• Inspect neutral start switch.

No ↓

INSPECT PARKING BRAKE SWITCH CIRCUIT
Is there battery voltage between terminal 12 and body ground with parking brake lever returned?

No → • Short circuit in wire harness between terminal 12 of computer and terminal 1 parking brake switch.
• Inspect parking brake switch.

Yes ↓

INSPECT SPEED SENSOR CIRCUIT
Disconnect connector from combination meter. Is there continuity between terminal C-7 (analog meter) or A-12 (digital meter) of wire harness side connector and terminal 6 of computer?

No → Open circuit in wire harness between terminal C-7 (analog meter) or A-12 (digital meter) and combination meter and terminal 6 of computer.

Yes ↓

Disconnect connector from combination meter. Is there continuity between terminal 6 and body ground?

Yes → Short circuit in wire harness between terminal 6 of computer and terminal 20 of combination meter.

No ↓

SPEED SENSOR

INSPECT GROUND CONNECTION
Disconnect connector from combination meter. Is there continuity between terminal C-6 (analog meter) or A-10 (digital meter) of wire harness side connector and body ground?

No → • Open circuit in wire harness between terminal C-6 (analog meter) or A-10 (digital meter) and body ground.
• Body ground faulty.

Yes ↓

INSPECT SPEED SENSOR OPERATION
Is speed sensor operation normal?
(See page BE-83)

No → Speed sensor faulty.

Yes ↓

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