DTC B141A-11: Room 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 room temp. sensor (cooler thermistor) connector.
*1 Room Temp. Sensor (Cooler Thermistor) *2 Air Conditioning Amplifier 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 B141A-15 is output A B141A-11 is output B
Post-procedure1
- None
Result:
A
REPLACE ROOM TEMP. SENSOR (COOLER THERMISTOR). Refer to REMOVAL [10/2022 - ]
Result:
B
See step 3
- CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - ROOM TEMP. SENSOR (COOLER THERMISTOR))
Pre-procedure1
- Disconnect the C57 room temp. sensor (cooler thermistor) connector.
- Disconnect the C48 air conditioning amplifier assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result C57-1 (+) or C48-5 (TR) - Other terminals and body ground Always 10 kΩ or higher kΩ C57-2 (-) or C48-3 (SG-1) - Other terminals and body ground Always 10 kΩ or higher kΩ Result
Proceed to OK NG
Post-procedure1
- None
Result:
OK
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to REMOVAL [10/2022 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR