Malfunction in Water Temperature Warning Light: Procedure

1. Check if CAN communication DTCs are output. Refer to DIAGNOSIS SYSTEM .

   Result

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

B → See step   7 

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
   Indicat. Lamp Coolant Hot	Water temperature warning light	OFF or ON	-

   OK

   Water temperature warning light operation is normal.

NG → See step   8 

OK: Go to next step 

1. Check for DTCs. Refer to DTC CHECK / CLEAR for SFI System. Refer to DTC CHECK / CLEAR for Meter/Gauge System).

   Result

   Result	Proceed to
   DTC is not output.	A
   DTC of SFI system is output.	B
   DTC B1503 is output.	C

B → See step   9 

C → See step   10 

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 / 0 to 127.5°C (0 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	Stored as Freeze Frame Data
   Coolant Temp	Engine coolant temperature/ Min.: -40°C (-40°F), Max.: 140°C (284°F)	75 to 100°C (167 to 212°F): After warming up	Yes
   	Diagnostic Note: This is the engine coolant temperature. HINT:  After warming up the engine, the engine coolant temperature is 75 to 100°C (167 to 212°F). After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature are approximately equal. If the value is -40°C (-40°F) or higher than 135°C (275°F), the sensor circuit may be open or shorted. Check if the engine overheats when the value indicates higher than 135°C (275°F).

   NOTE:

   Enter inspection mode. Refer to INSPECTION MODE PROCEDURE .

   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 do not match, a signal output error of the ECM is suspected.

B → See step   11 

A: Go to next step 

1. Replace the meter circuit plate with a new or a known good one. Refer to DISASSEMBLY .

   OK

   The operation of the water temperature warning light returns to normal.

NG → See step   12 

OK → END