DTC P0115: Engine Coolant Temperature Circuit Malfunction; DTC P0117: Engine Coolant Temperature Circuit Low Input; DTC P0118: Engine Coolant Temperature Circuit High Input [08/2015 - 08/2019]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn Techstream on.
3. Enter the following menus: Powertrain / Engine and ECT / Trouble Code.
4. Read DTCs.
   RESULT
   
   

   Display (DTC Output)	Proceed to
   P0115	A
   P0117	B
   P0118	C

Result: 

B 

See step  5

Result: 

C 

See step  3

Result: 

A 

See step  2

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

   Standard value

   Between 75°C and 100°C (167°F and 212°F) with warm engine

   RESULT
   
   

   Temperature Displayed	Proceed to
   -40°C (-40°F)	A
   140°C (284°F) or higher	B
   Between 75°C and 100°C (167°F and 212°F)	C

   HINT: 

   • If there is an open circuit, the Techstream indicates -40°C (-40°F).
   • If there is a short circuit, the Techstream indicates 140°C (284°F) or higher.

Result: 

B 

See step  5

Result: 

C 

CHECK FOR INTERMITTENT PROBLEMS 

(Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2015 - ] )

Result: 

A 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard value

   140°C (284°F) or higher

   TEXT IN ILLUSTRATION
   
   

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

8. Reconnect the engine coolant temperature sensor connector.

Result: 

OK 

CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

See step  4

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

   Tester Connection	Condition	Specified Condition
   B25-2 - B38-17 (THW)	Always	Below 1 Ω
   B25-1 - B37-8 (ETHW)	Always	Below 1 Ω

4. Reconnect the engine coolant temperature sensor connector.
5. Reconnect the ECM connector.

Result: 

OK 

CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the engine coolant temperature sensor connector.
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 and ECT / Data List / Coolant Temp.
6. Read the value displayed on the Techstream.

   Standard value

   -40°C (-40°F)

   TEXT IN ILLUSTRATION
   
   

   *1	Engine Coolant Temperature Sensor
   *2	ECM

7. Reconnect the engine coolant temperature sensor connector.

Result: 

OK 

REPLACE ENGINE COOLANT TEMPERATURE SENSOR 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

See step  6

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

   Tester Connection	Condition	Specified Condition
   B25-2 or B38-17 (THW) - Body ground	Always	10 kΩ or higher

4. Reconnect the engine coolant temperature sensor connector.
5. Reconnect the ECM connector.

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR