Malfunction in Water Temperature Warning Light [11/2015 -]: Procedure

1. Check if CAN communication system DTCs are output.

   Refer to DIAGNOSIS SYSTEM [11/2015 - 11/2017] , or refer to DIAGNOSIS SYSTEM [11/2017 - 12/2018] , or refer to DIAGNOSIS SYSTEM [12/2018 - 08/2019] , or refer to DIAGNOSIS SYSTEM [08/2019 - 07/2020] , or refer to DIAGNOSIS SYSTEM [07/2020 -]

   Body Electrical > Combination Meter > Trouble Codes 

   Result

   Result	Proceed to
   CAN communication system DTCs are not output.	A
   CAN communication system DTCs are output.	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - 12/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2018 -] 

Result: 

A 

See step  2

1. Check the engine coolant temperature hot warning light.

   Result

   Result	Proceed to
   Engine coolant temperature hot warning light does not come on.	A
   Engine coolant temperature hot warning light blinks or remains on.	B

Result: 

B 

See step  4

Result: 

A 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > Combination Meter > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Indicat. Lamp Coolant Hot	Engine coolant temperature hot warning light	OFF or ON	-

   Body Electrical > Combination Meter > Active Test 

   Tester Display
   Indicat. Lamp Coolant Hot

   OK

   Engine coolant temperature hot warning light operation is normal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE). Refer to  DISASSEMBLY [11/2015 -] 

Result: 

OK 

See step  4

1. Check if SFI system DTCs are output.

   Refer to DTC CHECK / CLEAR [11/2015 - 07/2020] , or refer to DTC CHECK / CLEAR [07/2020 -]

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   SFI system DTCs are not output.	A
   SFI system DTCs are output.	B

Result: 

B 

GO TO SFI SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2015 - 08/2016]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2016 - 11/2017]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2017 - 12/2018]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2018 - 08/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2019 - 07/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [07/2020 -] 

Result: 

A 

See step  5

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus:
   1. for Engine: Powertrain / Engine / Data List.
   2. for Combination Meter: Body Electrical / Combination Meter / Data List.
5. Read the Data List according to the display on the Techstream.

   Powertrain > Engine > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Coolant Temperature	Engine coolant temperature	Min.: -40°C (-40°F), Max.: 140°C (284°F)	75 to 100°C (167 to 212°F): After warming up	This is the engine coolant temperature. HINT:  After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F). After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal. If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted. Check if the engine overheats if the value indicated is higher than 135°C (275°F).

   Powertrain > Engine > Data List 

   Tester Display
   Coolant Temperature

   Body Electrical > Combination Meter > Data List 

   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)	75 to 100°C (167 to 212°F) (After warming up engine)	-

   Body Electrical > Combination Meter > Data List 

   Tester Display
   Coolant Temperature

   Result

   Result	Proceed to
   The Data List values of the ECUs do not match.	A
   The Data List values of the ECUs match.	B

   HINT: 

   • When the Data List values of the ECUs match, an internal malfunction of the ECM is suspected.
   • When the Data List values of the ECUs do not match, a signal output malfunction of the ECM or an internal malfunction of the combination meter assembly (meter circuit plate) is suspected.

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [11/2015 - 12/2018]  , or refer to  REMOVAL [12/2018 - 07/2020]  , or refer to  REMOVAL [07/2020 -] 

Result: 

A 

See step  6

1. Replace the combination meter assembly (meter circuit plate) with a new or known good one.

   Refer to DISASSEMBLY [11/2015 -]

   OK

   The operation of the engine coolant temperature hot warning light returns to normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

REPLACE ECM. Refer to  REMOVAL [11/2015 - 12/2018]  , or refer to  REMOVAL [12/2018 - 07/2020]  , or refer to  REMOVAL [07/2020 -]