Engine Coolant Temperature Light Blinks In Red And Blue Alternately

WARNING: This page is about a different variant/trim than selected.

Trouble causes:

CAN communication failure
Engine coolant temperature sensor malfunction
Combination meter malfunction

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>GENERAL DESCRIPTION>CAUTION .

CHECK DTC .
Read the DTC of [Engine] using the Subaru Select Monitor. Ref. to ENGINE (DIAGNOSTICS) (H4DO (HEV))>DIAGNOSTIC TROUBLE CODE (DTC) .

Is any of [ENGINE COOLANT TEMPERATURE SENSOR 1 CIRCUIT RANGE/PERFORMANCE], [ENGINE COOLANT TEMPERATURE SENSOR 1 CIRCUIT LOW], [ENGINE COOLANT TEMPERATURE SENSOR 1 CIRCUIT HIGH] displayed? (Current malfunction)

Yes : Perform the diagnosis for the displayed DTCs.

No : Go to 2.
CHECK DTC .
1. Start the engine.
2. Using the Subaru Select Monitor, read all DTCs. Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC U**** displayed? (Current malfunction)

Yes : Perform the diagnosis according to the basic diagnostic procedure in LAN SYSTEM (DIAGNOSTICS). Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>BASIC DIAGNOSTIC PROCEDURE .

No : Go to 3.
CHECK THE ENGINE COOLANT TEMPERATURE LIGHT .
Using the Subaru Select Monitor, check the following items in the [Active Test] of [Combination Meter]. Ref. to COMBINATION METER (DIAGNOSTICS)>ACTIVE TEST .
- Water temperature (HOT)
- Water temperature (COOL)
Do the indicated amount on Subaru Select Monitor and the engine coolant temperature light indication match?

Yes : Perform a unit inspection of the engine coolant temperature sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (HEV))>ENGINE COOLANT TEMPERATURE SENSOR .

No : Replace the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>COMBINATION METER .