DTC P0195-15: Engine Oil Temperature Sensor Circuit Short to Battery or Open [08/2019 -]: Procedure

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT: 

Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

1. Disconnect the engine oil temperature sensor connector.
2. Turn the power switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   C74-3 (VC) - C74-2 (GND)	Power switch on (IG)	4.5 to 5.5 V
   C74-4 (TOUT) - C74-2 (GND)	Power switch on (IG)	0.54 to 4.86 V

4. Turn the power switch off and wait for at least 30 seconds.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   C74-2 (GND) - Body ground	Power switch off	Below 1 Ω
   C74-3 (VC) - C74-4 (TOUT)	Power switch off	171 to 189 kΩ

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE OIL PRESSURE AND TEMPERATURE SENSOR. Refer to  REMOVAL [08/2019 -] 

Result: 

NG 

See step  2

1. Disconnect the engine oil 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
   C74-2 (GND) - C55-100 (EPEO)	Always	Below 1 Ω
   C74-4 (TOUT) - C55-123 (THEO)	Always	Below 1 Ω
   C74-4 (TOUT) or C55-123 (THEO) - Other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [04/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 -] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR