Engine Coolant Temperature Receiver Gauge Malfunction: Procedure

1. Check if a CAN communication DTC is output. Refer to DIAGNOSIS SYSTEM .

   Result

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

B → See step   8 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
5. Check the operation by referring to the table below.
   COMBINATION METER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Water Temperature Meter Operation	Engine coolant temperature receiver gauge	Low, Normal, High	Confirm that the vehicle is stopped with the engine idling

   OK

   Engine coolant temperature receiver gauge indication is normal.

NG → See step   5 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Data List.
5. Check the values by referring to the table below.
   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temperature	Engine coolant temperature/-40 to 140°C (-40 to 284°F)	After warming up: 80 to 95°C (176 to 203°F)	If -40°C (-40°F): Sensor circuit open If 140°C (284°F) or more: Sensor circuit shorted

   OK

   Engine coolant temperature value displayed on the Techstream is almost the same as the engine coolant temperature receiver gauge indication.

6. Record the temperature displayed on the Techstream.

NG → See step   5 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List.
5. Check the values by referring to the table below.
   ENGINE AND ECT
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temp	Engine coolant temperature/Min.: -40°C (-40°F), Max.: 215°C (419°F)	After warming up: 80 to 100°C (176 to 212°F)	-

   OK

   Engine coolant temperature value displayed on the Techstream is almost the same as the previously recorded Techstream indication (Body Electrical / Combination Meter / Data List / Coolant Temperature).

NG → See step   6 

OK → See step   7