TSRM/MK4 Supra/Repair Manual
Repair ManualWiring Diagrams
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BE/Body Electrical Systems202 / 203
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BODY ELECTRICAL SYSTEM — SERVICE SPECIFICATIONS — MK4 Supra Body Electrical Systems, page 202
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BE–202 BODY ELECTRICAL SYSTEM – SERVICE SPECIFICATIONS TACHOMETER (ON–VEHICLE) Standard indication (rpm) Allowable range (rpm) 700 630 – 770 1000 915 – 1115 2000 1920 – 2220 3000 2890 – 3350 4000 3940 – 4400 5000 5025 – 5425 6500 6650 – 6950 7000 7025 – 7625 OD/TRIP METER (CONNECTOR CONNECTED) 1 – Ground (Ignition SW position ON) Battery positive voltage 4 – Ground (Light Control SW position TAIL or HEAD) Battery positive voltage 5 – 7 (Ignition SW ON and drive the vehicle slowly) 0V ↔ Battery positive voltage 6 – 7 (Ignition SW ON and drive the vehicle slowly) 0V ↔ more than 5V 8 – Ground (Constant) Battery positive voltage 10 – Ground (Ignition SW ON, Light Control SW TAIL or HEAD and turn the Light Control Rheostat knob to clockwise) 6V → 0V FUEL RECEIVER GAUGE A – B Approx. 269.7 Ω A – C Approx. 123.5 Ω B – C Approx. 146.2 Ω FUEL SENDER GAUGE Float position: F Approx. 4.0 Ω Float position: 1/2 Approx. 55.0 Ω Float position: E Approx. 107.0 Ω ENGINE COOLANT TEMPERATURE RECEIVER GAUGE A – B Approx. 229.7 Ω A – C Approx. 54.0 Ω B – C Approx. 175.7 Ω ENGINE COOLANT TEMPERATURE SENDER GAUGE 50 °C (122.0 °F) 160 – 240 Ω 120 °C (248.0 °F) 17.1 – 21.2 Ω LIGHT FAILURE SENSOR 3 – Ground (Light Control SW position OFF) No voltage 3 – Ground (Light Control SW position TAIL or HEAD) Battery positive voltage 4 – Ground (Ignition SW position LOCK or ACC) No voltage 4 – Ground (Ignition SW position ON) Battery positive voltage 7 – Ground (Stop Light SW position OFF) No voltage 7 – Ground (Stop Light SW position ON) Battery positive voltage 8 – Ground (Engine stop) No voltage 8 – Ground (Engine running) Battery positive voltage INTEGRATION RELAY (Seat Belt Warning) 1 – Ground (Constant) Battery positive voltage 9 – Ground (Ignition SW LOCK or ACC) No voltage 9 – Ground (Ignition SW ON) Battery positive voltage