DTC P0197, P0198; Engine Oil Temperature Sensor Low [08/2014 - 08/2016]: Procedure

1. Connect the Techstream to the DLC3.
2. Start the engine and warm it up.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Control / Engine Oil Temperature Sensor.

   Powertrain > Engine and ECT > Data List 

   Tester Display
   Engine Oil Temperature Sensor

5. Read the value displayed on the Techstream.

   Standard value

   Between 80 and 110°C (176 and 230°F) with warm engine and engine idling

   Result

   Result	Proceed to
   -40°C (-40°F)	A
   Higher than 166°C (331°F)	B
   Between 80 and 110°C (176 and 230°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 166°C (331°F).

Result:  2

B 

See step  4

Result:  3

C 

CHECK FOR INTERMITTENT PROBLEMS:  CHECK FOR INTERMITTENT PROBLEMS [08/2013 - ] 

Result:  1

A 

See step  2

1. Disconnect the engine oil temperature sensor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Connect terminals 1 and 2 of the engine oil 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 / Engine Control / Engine Oil Temperature Sensor.

   Powertrain > Engine and ECT > Data List 

   Tester Display
   Engine Oil Temperature Sensor

7. Read the value displayed on the Techstream.

   Standard Value

   Higher than 166°C (331°F)

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE ENGINE OIL TEMPERATURE SENSOR:  REMOVAL [08/2013 - ] 

Result:  2

NG 

See step  3

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
   B38-2 - B33-131 (THEO)	Always	Below 1 Ω
   B38-1 - B33-132 (ETHE)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE ECM:  REMOVAL [08/2013 - 08/2016] 

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the engine oil temperature sensor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Engine Oil 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 and ECT / Data List / Engine Control / Engine Oil Temperature Sensor.

   Powertrain > Engine and ECT > Data List 

   Tester Display
   Engine Oil Temperature Sensor

6. Read the value displayed on the Techstream.

   Standard Value

   -40°C (-40°F)

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE ENGINE OIL TEMPERATURE SENSOR:  REMOVAL [08/2013 - ] 

Result:  2

NG 

See step  5

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
   B33-131 (THEO) or B38-2 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE ECM:  REMOVAL [08/2013 - 08/2016] 

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR