| 
 | 
 Heat the sensor of temperature of cooling liquid (1), watching change of resistance between the plug (2) and a sensitive element (1). Resistance has to decrease with increase in temperature. 
 
 | 
 
 
Measure resistance between the plug (2) and a sensitive element (1) at a temperature of 50 °C. If results of check do not meet the specification, then replace the sensor. 
 
  | 
  
 |