940 L4-2.3L SOHC VIN 88 B230F (1992)
Temperature Gauge: Testing and Inspection
Testing Temperature Gauge
Check temperature gauge with a test resistor of 68 ohms, P/N 999 5824-1.
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Disconnect battery negative lead.
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Unplug connector at sensor.
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Connect the test resistor between the two terminals in the connector.
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Replace battery negative lead and turn on ignition.
If the gauge is working correctly. the pointer should be in the middle of the red zone. See illustration.
Tolerance: breadth of the pointer.
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If the gauge shows correctly. the sensor is faulty.
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If the gauge shows incorrectly. the gauge itself is faulty
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Measure the resistance of the sensor.
When engine is warm: 100-260 ohm.
When engine is cold: 780 ohm.
If the gauge does not register at all. check the lead. Check for continuity in the lead with an ohmmeter.
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If the lead is OK replace the gauge.
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Test.
