DTC P0115-15: Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open [12/2019 - 10/2022]: Procedure

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the engine coolant temperature sensor connector.
2. Connect terminals 2 (THW) and 1 (E2) of the engine coolant temperature sensor connector on the wire harness side.
3. According to the display on the GTS, read the Data List.

   Powertrain > Engine > Data List 

   Tester Display
   Coolant Temperature

   OK

   GTS Display	Specified Condition
   Coolant Temperature	Higher than 135°C (275°F)

   HINT: 

   Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

   Refer to INITIALIZATION [12/2019 - 10/2022]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

NG 

See step  2

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
   C41-2 (THW) - C54-101 (THW)	Always	Below 1 Ω
   C41-1 (E2) - C54-133 (ETHW)	Always	Below 1 Ω
   C41-2 (THW) or C54-101 (THW) - Other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [12/2019 - 09/2020]  , or refer to  REMOVAL [09/2020 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR