DTC P0117: Engine Coolant Temperature Circuit Low Input; DTC P0118: Engine Coolant Temperature Circuit High Input [06/2016 - ]: 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.

   Standard value

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

   RESULT
   
   

   Result	Proceed to
   -40°C (-40°F)	A
   120°C (248°F)	B
   Between 75 and 100°C (167 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 higher than 120°C (248°F).

Result: 

B 

See step  4

Result: 

C 

CHECK FOR INTERMITTENT PROBLEMS 

(Refer to CHECK FOR INTERMITTENT PROBLEMS [06/2016 - ] )

Result: 

A 

See step  2

1. Disconnect the engine coolant temperature sensor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard value

   Higher than 120°C (248°F)

   TEXT IN ILLUSTRATION
   
   

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

Result: 

OK 

REPLACE ENGINE COOLANT TEMPERATURE SENSOR 

(Refer to REMOVAL [06/2016 - ] )

Result: 

NG 

See step  3

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
   A36-30 (THW) - C40-2 (THW)	Always	Below 1 Ω
   A36-29 (E1) - C40-1 (E2)	Always	Below 1 Ω

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [06/2016 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the engine coolant temperature sensor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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)

   TEXT IN ILLUSTRATION
   
   

   *1	Engine Coolant Temperature Sensor
   *2	ECM

Result: 

OK 

REPLACE ENGINE COOLANT TEMPERATURE SENSOR 

(Refer to REMOVAL [06/2016 - ] )

Result: 

NG 

See step  5

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
   A36-30 (THW) or C40-2 (THW) - Body ground	Always	10 kΩ or higher
   A36-29 (E1) or C40-1 (E2) - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [06/2016 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR