Chrysler Neon 1995-1999 Repair Guide

Coolant Temperature Sensor

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TESTING



See Figure 1

  1. Detach the coolant temperature sensor electrical connector.
  2.  
  3. Turn the ignition switch to the ON position. The temperature gauge should be at its lowest position.
  4.  
  5. Ground the temperature gauge sending unit connector pin 3, as shown in the accompanying figure. Turn the ignition switch ON . The temperature gauge should be at its highest position. After the seat belt lamp goes out, the cluster should chime for about 8 seconds.
  6.  



Click image to see an enlarged view

Fig. Fig. 1: The coolant temperature sensor gauge pin to be grounded is on the bottom

  1. If OK, check the temperature sending unit connector for proper connection. If connections are OK, replace the sending unit.
  2.  
  3. If not OK, and the high temperature chime should but the gauge shows cold, replace the gauge assembly. If the gauge still does not work, replace the printed circuit board.
  4.  

REMOVAL & INSTALLATION



See Figure 2

  1. Disconnect the negative battery cable.
  2.  
  3. Unplug the sensor electrical connector.
  4.  
  5. Remove the sensor from the vehicle.
  6.  



Click image to see an enlarged view

Fig. Fig. 2: The coolant temperature sensor (which controls the gauge) is located near the camshaft position sensor

To install:
  1. Instal the sensor in the vehicle and tighten securely.
  2.  
  3. Attach the electrical connector to the sensor.
  4.  
  5. Connect the negative battery cable.
  6.  

 
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