DTC P1F1C-11: Water Cooling Condenser Refrigerant Temperature Sensor Circuit Short to Ground [08/2023 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
- CLEAR DTC
Result:
NEXT
See step 2
- CHECK FOR DTC
Pre-procedure1
- Turn the ignition switch off.
- Disconnect the water cooling condenser refrigerant temperature sensor (No. 2 air conditioning thermistor assembly) connector.
*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-15 is output A P1F1C-11 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 3
- CHECK HARNESS AND CONNECTOR (WATER COOLING CONDENSER REFRIGERANT TEMPERATURE SENSOR (NO. 2 AIR CONDITIONING THERMISTOR ASSEM - HEAT PUMP ECU ASSEMBLY)
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 A65-1 (SEG2) or A62-25 (SG-4) - 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