TSRM/MK2 Supra/Repair Manual
Repair ManualWiring Diagrams
p.073

BE/Body Electrical System, page 74

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Body Electrical System — MK2 Supra Body Electrical System, page 74
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Yes

INSPECT SET/COAST SWITCH CIRCUIT
Is there continuity between terminal 4 and body ground with set/coast switch turned on?

No
• Open circuit in wire harness between terminal 4 of computer and terminal 30 of control switch.
• Inspect control switch.

Yes

Is there continuity between terminal 4 and body ground with set/coast switch turned off?

Yes
• Short circuit in wire harness between terminal 4 of computer and terminal 30 of control switch.
• Inspect control switch.

No

INSPECT ACCEL/RESUME SWITCH CIRCUIT
Is there continuity between terminal 13 and body ground with accel/resume switch turned on?

No
• Open circuit in wire harness between terminal 13 of computer and terminal 28 of control switch.
• Inspect control switch.

Yes

Is there continuity between terminal 13 and body ground with accel/resume switch turned off?

Yes
• Short circuit in wire harness between terminal 13 of computer and terminal 28 of control switch.
• Inspect control switch.

No

INSPECT CONTROL VALVE CIRCUIT
Is resistance value about 30 Ω between terminals 2 and 3?

No
• Open or short circuit in wire harness between terminal 3 of computer and terminal 2 of actuator.
• Open circuit in wire harness between terminal 1 of actuator and terminal 2 of computer.
• Inspect actuator.

Yes

INSPECT RELEASE VALVE CIRCUIT
Is resistance value about 68 Ω between terminals 1 and 2 with brake pedal returned?

No
• Open or short circuit in wire harness between terminal 1 of computer and terminal 3 of actuator.
• Open circuit in wire harness between terminal 1 of actuator and terminal 2 of computer.
• Inspect stop light switch.

Yes

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