DTC P0115: Engine Coolant Temperature Circuit; DTC P0117: Engine Coolant Temperature Circuit Low Input; DTC P0118: Engine Coolant Temperature Circuit High Input [08/2013 - ]: Procedure

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 / Data List / Coolant Temp.
5. Read the value displayed on the Techstream.

   OK

   Same as actual engine coolant temperature.

   RESULT
   
   

   Result	Proceed to
   Displayed temperature is -40°C (-40°F)	A
   Displayed temperature is higher than 135°C (275°F)	B
   Same as actual engine coolant temperature	C

   HINT: 

   • If there is an open circuit, the Techstream indicates -40°C (-40°F).
   • If there is a short circuit, the Techstream indicates higher than 135°C (275°F).

B → See step   4 

C → See step   6 

A: Go to next step 

1. Confirm good connection at the engine coolant temperature sensor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	Engine Coolant Temperature Sensor	*2	ECM
   *a	Front view of wire harness connector (to Engine Coolant Temperature Sensor)	-	-

2. Disconnect the engine coolant temperature sensor connector.
3. Connect terminals 2 and 1 of the engine coolant temperature sensor connector on the wire harness side.
4. Connect the Techstream to the DLC3.
5. Turn the ignition switch to ON.
6. Turn the Techstream on.
7. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.
8. Read the value displayed on the Techstream.

   Standard value

   Higher than 135°C (275°F)

NG → See step   3 

OK → See step   7 

1. Disconnect the engine coolant temperature sensor connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B5-2 - B1-76 (THW)	Always	Below 1 Ω
   B5-1 - B1-97 (ETHW)	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8 

1. Disconnect the engine coolant temperature sensor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	Engine Coolant Temperature Sensor
   *2	ECM

2. Connect the Techstream to the DLC3.
3. Turn the ignition switch to ON.
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.
6. Read the value displayed on the Techstream.

   Standard value

   -40°C (-40°F)

NG → See step   5 

OK → See step   7 

1. Disconnect the engine coolant temperature sensor connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B5-2 or B1-76 (THW) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8