Engine Coolant Temperature Receiver Gauge Malfunction: Procedure

1. Check if CAN communication DTC is output.
   • w/ Smart Key System:, refer to DIAGNOSIS SYSTEM
   • w/o Smart Key System:, refer to DIAGNOSIS SYSTEM
   RESULT
   
   

   Result	Proceed to
   CAN communication system DTC is not output.	A
   CAN communication system DTC is output. (w/ Smart Key System)	B
   CAN communication system DTC is output. (w/o Smart Key System)	C

B → See step   5 

C → See step   8 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Data List.
   COMBINATION METER:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temperature	Engine coolant temperature/Min.: 0°C (32°F), Max.: 127.5°C (261.5°F)	After warming up: 80 to 95°C (176 to 203°F)	-

   OK

   Engine coolant temperature value displayed on the tester is almost the same as needle indication.

NG → See step   6 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Hybrid Vehicle Control / Data List.
5. Check the values by referring to the values in the table below.
   HYBRID VEHICLE CONTROL:
   
   

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

   OK

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

NG → See step   7 

OK: Go to next step 

1. Replace the combination meter assembly with a new or normally functioning one, refer to REMOVAL .

   OK

   The operation of the combination meter assembly returns to normal.

NG → See step   7 

OK → END (COMBINATION METER ASSEMBLY IS DEFECTIVE)