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940 L4-2.3L SOHC VIN 88 B230F (1992)

Engine, Cooling and Exhaust > Cooling System > Lamps and Indicators - Cooling System > Temperature Gauge > Component Information > Testing and Inspection > Gauge Not Working at All > Page 3853

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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.

Engine, Cooling and Exhaust > Cooling System > Lamps and Indicators - Cooling System > Temperature Gauge > Component Information > Testing and Inspection > Gauge Not Working at All > Page 3853

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