Malfunction in Water Temperature Warning Light: Procedure

1. Check if a CAN communication DTC is output. Refer to DIAGNOSIS SYSTEM .

   Result

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

B → See step   9 

A: Go to next step 

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

B → See step   4 

A: Go to next step 

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
   Coolant Hot Indicator	Water temperature warning light	OFF or ON	-

   OK

   Water temperature warning light operation is normal.

NG → See step   7 

OK: Go to next step 

1. Check for the DTC.

   Result

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

B → See step   10 

C → See step   11 

A: Go to next step 

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. Refer to INSPECTION MODE PROCEDURE .

   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.

NG → See step   12 

OK: Go to next step 

1. Replace the combination meter assembly with a new or a known good one. Refer to REMOVAL .

   OK

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

NG → See step   8 

OK → END