Engine Coolant Temperature Gauge Malfunction: Procedure

1. Check the DTC. Refer to DTC CHECK/CLEAR .
   RESULT
   
   

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

B → See step   10 

A: Go to next step 

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

   OK

   Needle indication is normal.

   COMBINATION METER:
   
   

   Tester Display	Test Part	Control Range
   Water Temperature Meter Operation	Engine coolant temperature receiver gauge	Low/Normal/High

   HINT: 

   Confirm that the vehicle is stopped and engine is idling.

NG → See step   7 

OK: Go to next step 

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

   OK

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

   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 value -40 (-40): sensor circuit open If value 140 (284): sensor circuit shorted

NG → See step   4 

OK → See step   7 

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

   OK

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

   ENGINE:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Water Temperature	Engine coolant temperature/Min.: -40°C (-40°F), Max.: 140°C (284°F)	After warming up: 80 to 100°C (176 to 212°F)	-

NG → See step   8 

OK: Go to next step 

1. Temporarily replace the No. 1 meter ECU with a new one. Refer to DISASSEMBLY .

NEXT: Go to next step 

1. Check the operation of the combination meter returns to normal. Refer to OPERATION CHECK .

   OK

   Operation of combination meter returns to normal.

NG → See step   9 

OK → END (NO. 1 METER ECU IS DEFECTIVE)