Cooper S (R53) L4-1.6L SC (W11) (2004)
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If the sensor ground is shorted to 12V or shorted to 5V, temperature gauge will go to full hot and engine cooling fan goes to high when fault is
recognized.
Coolant Temperature Sensor Testing
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Ensure that voltage changes and does not remain constant at 0 or 5 volts
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Check Sensor Resistance
