Section 71 (Heating / Air Conditioning System - Diagnostic Codes, Circuit Tests & Symptom Tests)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2025 Lexus NX 350, 2025 Lexus NX 250, 2024 Lexus NX 350, 2024 Lexus NX 250, and 2023 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.
- AIR CONDITIONING SYSTEM (for Gasoline Model)
- VEHICLE CONTROL HISTORY (RoB) [11/2021 - ]
- DTC B13AA-87: Lost Communication with Front Control Rear Air Outlet Damper Control Servo Motor LIN Missing Message [11/2021 - ]
- DTC B13AB-7F: Front Control Rear Air Outlet Damper Control Servo Motor Actuator Stuck Off [11/2021 - ]
- DTC B1402-87: Lost Communication with Front Air Outlet Damper Control Servo Motor LIN Missing Message [11/2021 - ]
- DTC B1403-7F: Front Air Outlet Damper Control Servo Motor Actuator Stuck Off [11/2021 - ]
- DTC B141A-11: Room Temperature Sensor Circuit Short to Ground [11/2021 - ]
- DTC B141A-15: Room Temperature Sensor Circuit Short to Battery or Open [11/2021 - ]
- DTC B142A-88: Servo Motor LIN Communication Bus off [11/2021 - ]
- DTC B143A-87: Lost Communication with Air Inlet Damper Control Servo Motor LIN Missing Message [11/2021 - ]
- DTC B143B-7F: Air Inlet Damper Control Servo Motor Actuator Stuck Off [11/2021 - ]
- DTC B144B-87: Lost Communication with Front Left Air Mix Damper Control Servo Motor LIN Missing Message [11/2021 - ]
- DTC B144C-7F: Front Left Air Mix Damper Control Servo Motor Actuator Stuck Off [11/2021 - ]
- DTC B145A-87: Lost Communication with Front Right Air Mix Damper Control Servo Motor LIN Missing Message [11/2021 - ]
- DTC B145B-7F: Front Right Air Mix Damper Control Servo Motor Actuator Stuck Off [11/2021 - ]
- DTC P0070-11: Ambient Temperature Sensor Circuit Short to Ground [11/2021 - ]
- DTC P0070-15: Ambient Temperature Sensor Circuit Short to Battery or Open [11/2021 - ]
- DTC P0530-11: Refrigerant Pressure Sensor Circuit Short to Ground [11/2021 - ]
- DTC P0530-15: Refrigerant Pressure Sensor Circuit Short to Battery or Open [11/2021 - ]
- DTC P0534-7A: Refrigerant Gas Fluid Leak or Seal Failure [11/2021 - ]
- DTC P0535-11: Evaporator Temperature Sensor Circuit Short to Ground [11/2021 - ]
- DTC P0535-15: Evaporator Temperature Sensor Circuit Short to Battery or Open [11/2021 - ]
- DTC P06A0-14: Compressor Solenoid Circuit Short to Ground or Open [11/2021 - ]
- DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0163-87: Lost Communication with Navigation Control Module Missing Message [11/2021 - ]
- Blower Motor Circuit [11/2021 - ]
- Heater Water Pump Circuit [11/2021 - ]
- PTC Heater Circuit [11/2021 - ]
- Ambient Temperature Display System [11/2021 - ]
- ECO Switch Circuit [11/2021 - ]
- A/C Switch Indicator does not Turn On [11/2021 - ]
- No Cooling at All [11/2021 - ]
- Cooling is Poor [11/2021 - ]
- No Heating at All [11/2021 - ]
- Operation not Accepted Even If Air Conditioning Switch is Operated [11/2021 - ]
- Front Window Fogging [11/2021 - ]
- Blower Motor does not Operate [11/2021 - ]
- Weak Blower Output [11/2021 - ]
- Recirculated/Fresh Air Modes Switch without User Input [11/2021 - ]
- Recirculated/Fresh Air Modes do not Switch [11/2021 - ]
- Air Vent cannot be Switched [11/2021 - ]
- Air Vent Temperature does not Change and Right Vent is Different from Left and Vice Versa (Same Left/Right Temperature Setting) [11/2021 - ]