TSRM/MK4 Supra/Repair Manual
Repair ManualWiring Diagrams
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BE/Body Electrical Systems75 / 203
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TROUBLESHOOTING — MK4 Supra Body Electrical Systems, page 75
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BODY ELECTRICAL SYSTEM – POWER SEAT CONTROL SYSTEM BE–75 TROUBLESHOOTING The table below will be useful for you in troubleshooting these electrical problems. The most likely causes of the malfunction are shown in the order of their probability. Inspect each part in the order shown, and replace the part when it is found to be faulty. Trouble | Parts name | (See page) Power seat does not operate 1. POWER Fuse | (BE–5) 2. DOOR Fuse | (BE–6) 3. Wire Harness 4. Power Seat Switch | (BE–75) "Slide operation" does not operate 1. Power Seat Switch | (BE–75) 2. Wire Harness 3. Sliding Motor | (BE–76) "Reclining operation" does not operate 1. Power Seat Switch | (BE–75) 2. Wire Harness 3. Reclining Motor | (BE–77) Reclining Forward Back Forward Back Slide 2 1 4 3 Connector "A" 1 2 Connector "B" ND0885 POWER SEAT SWITCH INSPECTION INSPECT SWITCH CONTINUITY Slide Switch position | Tester connection to terminal number | Specified condition Forward | A1–A3 A2–A4 | Continuity Off | A1–A3 A1–A4 | Continuity Back | A1–A4 A2–A3 | Continuity Reclining Switch position | Tester connection to terminal number | Specified condition Forward | A1–B1 A2–B2 | Continuity Off | A1–B1 A1–B2 | Continuity Back | A1–B2 A2–B1 | Continuity If continuity is not as specified, replace the switch.