Engine Coolant Temperature Light Blinks in Red and Blue Alternately [11/2021 - ]: Procedure

1. Turn the ignition switch to ON.
2. Read the DTC of [Engine Control System] using the GTS.

   Powertrain > Engine Control System > Trouble Codes 

   Is DTC P0117 or P0118 displayed? (Current code)

   Result	Proceed to
   YES (Perform the diagnosis for the displayed DTCs.)	A
   NO	B

Result: 

A 

PERFORM THE DIAGNOSIS FOR THE DISPLAYED DTCS. 

Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2021 - 06/2022] , or refer to DIAGNOSTIC TROUBLE CODE CHART [06/2022 - 12/2023] , or refer to DIAGNOSTIC TROUBLE CODE CHART [12/2023 - 10/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ]

Result: 

B 

See step  2

1. Start the engine.
2. Using the GTS, read all DTCs.

   Is DTC U**** displayed? (Current code)

   Result	Proceed to
   YES (Perform the diagnosis according to the basic diagnostic procedure in CAN SYSTEM (DIAGNOSTICS).)	A
   NO	B

Result: 

A 

PERFORM THE DIAGNOSIS ACCORDING TO THE BASIC DIAGNOSTIC PROCEDURE IN CAN SYSTEM (DIAGNOSTICS). 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

Result: 

B 

See step  3

1. Using the GTS, check the following items in the [Active Test] of [Combination Meter].

   Body Electrical > Combination Meter > Active Test 

   Tester Display	Measurement Item	Diagnostic Note
   Water temperature (COOL)	Engine coolant temperature indicator light	-
   Water temperature (HOT)	Engine coolant temperature hot warning light	-

   Body Electrical > Combination Meter > Active Test 

   Tester Display
   Water temperature (COOL)

   Body Electrical > Combination Meter > Active Test 

   Tester Display
   Water temperature (HOT)

   Do the indicated amount on GTS and the engine coolant temperature light indication match?

   Result	Proceed to
   YES (Perform a unit inspection of the engine coolant temperature sensor.)	A
   NO (Replace the combination meter assembly.)	B

Result: 

A 

PERFORM A UNIT INSPECTION OF THE ENGINE COOLANT TEMPERATURE SENSOR. 

Refer to INSPECTION [11/2021 - ]

Result: 

B 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [11/2021 - ]