Malfunction in Water Temperature Warning Light [08/2014 - ]: Procedure

1. Check if a CAN communication DTC is output (See article. Refer to DIAGNOSIS SYSTEM [08/2014 - 08/2015] Refer to DIAGNOSIS SYSTEM [08/2015 - ] ).

   Result

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

Result:  B

B 

GO TO CAN COMMUNICATION SYSTEM 

(See article. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] )

Result:  A

A 

See step  2

1. Check the Water temperature warning light.

   Result

   Result	Proceed to
   Water temperature warning light does not come on.	A
   Water temperature warning light remains on.	B

Result:  B

B 

See step  4

Result:  A

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. Check the operation by referring to the table below.
   COMBINATION METER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Indicat. Coolant Hot	Water temperature warning light	OFF or ON	-

   OK

   Water temperature warning light operation is normal.

Result:  NG

NG 

REPLACE COMBINATION METER ASSEMBLY 

(See article. Refer to REMOVAL [08/2014 - ] )

Result:  OK

OK 

See step  4

1. Check for the DTC.

   Result

   Result	Proceed to
   DTC is not output.	A
   DTC P0115 is output.	B
   DTC B1503 is output.	C

Result:  B

B 

GO TO SFI SYSTEM 

(See article. Refer to DTC P0115: Engine Coolant Temperature Circuit Malfunction; DTC P0117: Engine Coolant Temperature Circuit Low Input; DTC P0118: Engine Coolant Temperature Circuit High Input [08/2014 - ] )

Result:  C

C 

GO TO METER / GAUGE SYSTEM 

(See article. Refer to DTC B1503: Exhaust Heat Management Warning Detected [08/2014 - ] )

Result:  A

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 Combination Meter: Body Electrical / Combination Meter / Data List.
   2. for Engine: Powertrain / Engine and ECT / Data List.
5. Check the values by referring to the table below.
   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temperature	Engine coolant temperature/-40 to 127.5°C (-40 to 261.5°F)	After warming up: 75 to 100°C (167 to 212°F)	-

   ENGINE AND ECT
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temp	Engine coolant temperature/Min.: -40°C (-40°F), Max.: 215°C (419°F)	75 to 100°C (167 to 212°F): After warming up	After warming up the engine: the engine coolant temperature 75 to 100°C (167 to 212°F). If the value is -40°C (-40°F) or 140°C (284°F), the sensor circuit open or shorted.

   NOTE:

   Enter the inspection mode (See article. Refer to INSPECTION MODE PROCEDURE [08/2014 - ] ).

   Result

   Result	Proceed to
   The data list values of the ECUs do not match.	OK
   The data list values of the ECUs match.	NG

   HINT: 

   When the Data List values of the ECUs do not match, a signal output error of the ECM is suspected.

Result:  NG

NG 

GO TO SFI SYSTEM 

(See article. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] )

Result:  OK

OK 

See step  6

1. Replace the combination meter assembly with a new or a known good one (See article. Refer to REMOVAL [08/2014 - ] ).

   OK

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

Result:  OK

OK 

END 

Result:  NG

NG 

REPLACE ECM 

(See article. Refer to REMOVAL [08/2014 - ] )