Engine Coolant Temperature Gauge Malfunction: Procedure

1. Check for DTCs, refer to PRECAUTION .
   RESULT
   
   

   Result	Proceed to
   CAN communication system DTC is not output	A
   CAN communication system DTC is output	B

B → See step   7 

A: Go to next step 

1. Operate the Techstream according to the display and select Active Test.
   COMBINATION METER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Water Temperature Meter Operation	Engine coolant temperature receiver gauge	LOW, NORMAL or HIGH	Perform the test with the vehicle stopped and engine idling.

   HINT: 

   Confirm that the vehicle is stopped and the engine is idling.

   OK

   Needle indication is normal.

NG → See step   8 

OK: Go to next step 

1. Operate the Techstream according to the display and select Data List.
   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temperature	Engine coolant temperature/Min.: -40 (-40), Max.: 140 (284)	After warming up: 80 to 105 (176 to 221)	Unit: °C (°F) If the value is -40 (-40): The sensor circuit is open If the value is 140 (284): The sensor circuit is shorted.

   OK

   Coolant temperature displayed on the Techstream is between 80°C (176°F) and 95°C (203°F) after warming up.

NG → See step   4 

OK → See step   8 

1. Operate the Techstream according to the display and select Data List.
   ENGINE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temp	Engine coolant temperature/ Min.: -40°C (-40°F), Max.:140°C (284°F)	80 to 100°C (176 to 212°F): After warming up	If the value is -40°C (-40°F): the sensor circuit is open. If the value is 140°C (284°F): the sensor circuit is shorted.

   OK

   Engine coolant temperature value displayed on the Techstream is almost the same as actual engine coolant temperature.

NG → See step   9 

OK: Go to next step 

1. Temporarily replace the combination meter with a new one, refer to REMOVAL .

NEXT: Go to next step 

1. Check that the operation of the combination meter returns to normal, refer to OPERATION CHECK .

   OK

   Operation of combination meter returns to normal.

NG → See step   10 

OK → END (COMBINATION METER IS DEFECTIVE)