DTC P00B1-15: Radiator Coolant Temperature Sensor Circuit Short to Battery or Open [10/2022 - ]: Procedure

Pre-procedure1

• Disconnect the No. 2 engine coolant temperature sensor connector.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *1	No. 2 Engine Coolant Temperature Sensor	*2	ECM
  *a	Front view of wire harness connector (to No. 2 Engine Coolant Temperature Sensor)	-	-

• Connect terminals 1 and 2 of the No. 2 engine coolant temperature sensor connector on the wire harness side.
• Turn the ignition switch to ON.

• According to the display on the GTS, read the Data List.

  Powertrain > Engine > Data List 

  Tester Display
  Radiator Coolant Temperature

  Result

  Result	Proceed to
  The value of Radiator Coolant Temperature is more than 135 °C	A
  None of the above conditions are met	B

  HINT: 

  135°C (275°F)

Post-procedure1

• None.

Result: 

A 

REPLACE NO. 2 ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

Result: 

B 

See step  2

Pre-procedure1

• Disconnect the No. 2 engine coolant temperature sensor connector.
• Disconnect the ECM connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A121-2 (THW3) - B28-129 (THTW)	Always	Below 1 Ω	Ω
  A121-1 (E2) - B28-130 (ETHT)	Always	Below 1 Ω	Ω
  A121-2 (THW3) or B28-129 (THTW) - Other terminals	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR