TSRM/MK4 Supra/Repair Manual
Repair ManualWiring Diagrams
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BE/Body Electrical Systems55 / 203
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SEAT BELT WARNING INSPECTION — MK4 Supra Body Electrical Systems, page 55
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BODY ELECTRICAL SYSTEM – COMBINATION METER BE–55 SEAT BELT WARNING INSPECTION 1. INSPECT INTEGRATION RELAY OPERATION (a) Connect the positive (+) lead from the battery to terminals 1 and 7. (b) Connect the positive (+) lead from the battery to terminal 9 through a 3.4W test bulb. (c) Check that the test bulb lights up and buzzer sounds for 4–8 seconds when the negative (–) lead from the battery is connected to terminal 10. (d) Check that the buzzer sounding in (c) stops when the negative (–) lead from the battery is connected to terminal 8. If operation is not as specified, replace the integration relay. N08953 N08954 Junction Block Side Connector "A" 12 11 10 9 8 7 6 5 4 3 2 1 BE6219 2. INSPECT RELAY CIRCUIT Remove the relay from the junction block No.1 and inspect the connectors on the junction block side. Tester connection to terminal number | Condition | Specified condition 4–Ground | Driver's door open | Continuity 4–Ground | Driver's door close | No continuity 5–Ground | Ignition key Set | Continuity 5–Ground | Ignition key remove | No continuity 8–Ground | Driver's seat belt fasten | Continuity 8–Ground | Driver's seat belt unfasten | No continuity 10–Ground | Constant | Continuity 1–Ground | Constant | Battery positive voltage 9–Ground | Ignition switch position ON | Battery positive voltage 9–Ground | Ignition switch position LOCK or ACC | No voltage If circuit is not as specified, try replacing the relay with a new one.