Engine Coolant Temperature Receiver Gauge Malfunction: 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   6 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
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
   Water Temperature Meter Operation	Engine coolant temperature receiver gauge	Low, Normal, High	Confirm that the vehicle is stopped while the engine is idling

   OK

   Gauge indication is normal.

NG → See step   7 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Data List.
   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temperature	Engine coolant temperature / Min.: 0°C (32°F), Max.: 127.5°C (261.5°F)	After warming up: 80 to 95°C (176 to 203°F)	If -40°C (-40°F) or less: Sensor circuit open If 140°C (284°F) or more: Sensor circuit shorted

   OK

   Engine coolant temperature value displayed on the Techstream is almost the same as engine coolant temperature receiver gauge indication.

NG → See step   7 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List.
5. Check the values by referring to the table below.
   ENGINE AND ECT (FOR 2AZ-FE)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temp	Engine coolant temperature: Min.: -40°C (-40°F), Max.: 140°C (284°F)	80 to 100°C (176 to 212°F): After warming up	If value -40°C (-40°F): sensor circuit open If value 140°C (284°F): sensor circuit shorted

   ENGINE AND ECT (FOR 2ZR-FE)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temp	Engine coolant temperature: Min.: -40°C (-40°F), Max.: 140°C (284°F)	80 to 100°C (176 to 212°F): After warming up	If value -40°C (-40°F): sensor circuit open If value 140°C (284°F): sensor circuit shorted

   OK

   Engine coolant temperature value displayed on the Techstream is almost the same as actual engine coolant temperature.

   Result

   Result	Proceed to
   OK	A
   NG (for 2AZ-FE)	B
   NG (for 2ZR-FE)	C

B → See step   8 

C → See step   9 

A: Go to next step 

1. Replace the combination meter with a new or known good one. Refer to REMOVAL - Step 4 .

   OK

   The operation of the combination meter returns to normal.

   Result

   Result	Proceed to
   OK	A
   NG (for 2AZ-FE)	B
   NG (for 2ZR-FE)	C

B → See step   8 

C → See step   9 

A → END