Malfunction in Water Temperature Warning Light: Procedure

1. Connect a Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Check for DTCs and note any codes that are output. Refer to DTC CHECK / CLEAR .
4. Clear the DTC. Refer to DTC CHECK / CLEAR .
5. Recheck for DTC. Refer to DTC CHECK / CLEAR .
   RESULT
   
   

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

B → See step   7 

A: Go to next step 

1. Connect a Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Check for DTCs and note any codes that are output. Refer to DTC CHECK / CLEAR .
4. Clear the DTC. Refer to DTC CHECK / CLEAR .
5. Recheck for DTC. Refer to DTC CHECK / CLEAR .
   RESULT
   
   

   Result	Proceed to
   Engine control DTC is not output	A
   Engine control DTC is output	B

B → 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 / Active Test.
5. According to the display on the Techstream, perform the Active Test.
   COMBINATION METER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Indicat. Lamp Coolant HOT	Engine coolant temperature indicator light	OFF/ON	Vehicle is stopped and engine is idling
   Indicat. Lamp Coolant COOL	Engine coolant temperature indicator light	OFF/ON	Vehicle is stopped and engine is idling

   OK

   Value selected during "Active Test" is displayed.

NG → See step   5 

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: Body Electrical / Combination Meter / Data List.
5. According to the display on the Techstream, read the Data List.
   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temperature	Engine coolant temperature Min.: 0 (0) Max.: 127.5 (261.5)	After warning up 75 to 105 (167 to 221)	Unit: °C (°F)

   OK

   Vehicle's coolant temperature and tester value are the same.

NG → See step   9 

OK → See step   6