TSRM/MK3 Supra/Repair Manual
Repair ManualWiring Diagrams
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BE/Body Electrical System88 / 116
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INSPECTION OF POWER SOURCE CIRCUIT. — MK3 Supra Body Electrical System, page 88
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BE-88 BODY ELECTRICAL SYSTEM — Theft Deterrent System A INSPECTION OF POWER SOURCE CIRCUIT. Turn ignition switch off. Is DOME fuse normal? No → Replace fuse. Is operation normal? No → Short circuit in wire harness between fuse and terminal 14 of computer. Yes ↓ Yes ↓ Fuse faulty. COMPUTER Disconnect computer connector and inspect connector on wire harness side as follows. INSPECT POWER SOURCE Is there battery voltage between terminal 14 and ground. No → Open circuit in wire harness between fuse and terminal 14 of computer. Yes ↓ INSPECT GROUND CONNECTION Is there continuity between terminal 5 and ground. No → • Open circuit in wire harness between terminal 5 of computer and ground. • Ground faulty. Yes ↓ INSPECT FOLLOWING SECTIONS. Ignition switch circuit .........................Section B Front door lock solenoid circuit ..........Section E Front door key lock and unlock switch circuit .....................................Section C Door lock switch circuit.........................Section F Back door key unlock switch circuit ....Section D Back door courtesy switch circuit ........Section G Engine hood switch circuit....................Section G Yes ↓ Replace computer.