Temperature Gauge
- Unplug connector at coolant temperature sender. Connect a 3.4 watt test lamp between wire and ground. Turn ignition on. Bulb should start flashing and needle of gauge should vibrate.
- Connect ohmmeter between sender terminal and body of sender. Check resistance at several coolant temperature. Replace sender if inaccurate.Coolant Temperature Sender Resistance
Model Temperature °F (°C) Resistance (Ohms) Cressida 176 (80) 72 212 (100) 37 Land Cruiser 122 (50) 226 240 (115) 26 Tercel 176 (80) 64-84 212 (100) 36-45 All Other Models 176 (80) 48-52 212 (100) 27-28 - Check gauge resistance by measuring across terminals with ohmmeter. Ignition must be off and connector unplugged. Resistance should be as shown in "Fuel and Temperature Gauge Internal Resistance" chart.