DTC P1F1C-15: Water Cooling Condenser Refrigerant Temperature Sensor Circuit Short to Battery or Open [08/2023 - ]: Procedure

Pre-procedure1

• Disconnect the A65 water cooling condenser refrigerant temperature sensor (No. 2 air conditioning thermistor assembly) connector.

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Front view of wire harness connector (to Water Cooling Condenser Refrigerant Temperature Sensor (No. 2 Air Conditioning Thermistor Assembly))

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  A65-2 (TCHT) - Body ground	Ignition switch ON	0 to 5.5 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

See step  5

Result: 

OK 

See step  2

1. Clear the DTCs.

   Body Electrical > Air Conditioner > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

Pre-procedure1

• Turn the ignition switch off.
• Disconnect the A65 water cooling condenser refrigerant temperature sensor (No. 2 air conditioning thermistor assembly) connector.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Front view of wire harness connector (to Water Cooling Condenser Refrigerant Temperature Sensor (No. 2 Air Conditioning Thermistor Assembly))

• Connect terminals 1 and 2 of the No. 2 air conditioning thermistor assembly connector on the wire harness side.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *1	Water Cooling Condenser Refrigerant Temperature Sensor (No. 2 Air Conditioning Thermistor Assembly)
  *2	Heat Pump ECU Assembly

• Turn the ignition switch to ON and wait for 4 seconds or more.

• Check for DTCs.

  Body Electrical > Air Conditioner > Trouble Codes 

  Result

  Result	Proceed to
  P1F1C-11 is output	A
  P1F1C-15 is output	B

Post-procedure1

• None

Result: 

A 

REPLACE WATER COOLING CONDENSER REFRIGERANT TEMPERATURE SENSOR (NO. 2 AIR CONDITIONING THERMISTOR ASSEMBLY). Refer to  REMOVAL [08/2023 - ] 

Result: 

B 

See step  4

Pre-procedure1

• Disconnect the A65 water cooling condenser refrigerant temperature sensor (No. 2 air conditioning thermistor assembly) connector.
• Disconnect the A62 heat pump ECU assembly connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A65-2 (TCHT) - A62-6 (TSCL)	Always	Below 1 Ω	Ω
  A65-1 (SEG2) - A62-25 (SG-4)	Always	Below 1 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE HEAT PUMP ECU ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Pre-procedure1

• Disconnect the A65 water cooling condenser refrigerant temperature sensor (No. 2 air conditioning thermistor assembly) connector.
• Disconnect the A62 heat pump ECU assembly connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A65-2 (TCHT) or A62-6 (TSCL) - Other terminals and body ground	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE HEAT PUMP ECU ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR