Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Air Conditioning System| DTC No. | Detection Item | DTC Detection Condition | Link |
|---|---|---|---|
| B1411/11 | Room Temperature Sensor Circuit | Open or short in room temperature sensor circuit | |
| B1412/12 | Ambient Temperature Sensor Circuit | Open or short in ambient temperature sensor circuit | |
| B1413/13 | Evaporator Temperature Sensor Circuit | Open or short in evaporator temperature sensor circuit | |
| B1417/17 | Evaporator Temperature Circuit | Open or short in rear evaporator temperature sensor circuit | |
| B1418/18 | Exhaust Gas Sensor Circuit | Open or short in smog ventilation sensor circuit (HC, CO) (w/ Smog Ventilation Sensor) | |
| B1419/19 | Rear Room Temperature Sensor Circuit | Open or short in rear room temperature sensor circuit | |
| B1422/22 | Compressor Lock Sensor Circuit | Open or short in A/C lock sensor circuit | |
| B1423/23 | Pressure Sensor Circuit |
| |
| B1441/41 | Air Mix Damper Control Servo Motor Circuit (Passenger Side) | Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) | |
| B1442/42 | Air Inlet Damper Control Servo Motor Circuit | Air inlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 blower damper servo sub-assembly | |
| B1443/43 | Air Outlet Damper Control Servo Motor Circuit | Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 3 air conditioning radiator damper servo sub-assembly | |
| B1446/46 | Air Mix Damper Control Servo Motor Circuit (Driver Side) | Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) | |
| B1447/47 | Air Mix Damper Control Servo Motor Circuit (Rear) | Air outlet damper position does not change when the air conditioning amplifier assembly operates the Rear No. 2 cooling unit damper servo sub-assembly. | |
| B1448/48 | Passenger Side FACE Servo Motor Circuit | Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly (front passenger side mode) | |
| B1449/49 | Rear Air Outlet Damper Control Servo Motor Circuit | Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates No. 2 air conditioning radiator damper servo sub-assembly | |
| B1451/51 | Compressor Solenoid Circuit | Open or short in compressor solenoid circuit | |
| B1461/61 | Emission Gas NOx Sensor Circuit | Open or short in emission gas NOx sensor circuit (w/ Smog Ventilation Sensor) | |
| B1486/86 | Air Outlet Damper Control Servo Motor Circuit(Driver Side Front A/C Rear Air Flow) | Rear air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates Rear No. 1 cooling unit damper servo sub-assembly | |
| B1497/97 | BUS IC Communication Malfunction | Error or open in communication line | |
| B14B3 | Lost Communication with Rear Panel LIN | Lost communication with No. 2 air conditioning control assembly | |
| B14B8 | Refrigerant Shortage | When following condition is detected in refrigerant shortage check in normal operation: Amount of refrigerant is insufficient | |
| U0100 | Lost Communication with ECM | No communication with ECM | |
| U0131 | Lost Communication with Electric Power Steering ECU | No communication with power steering ECU assembly | |
| U0142 | Lost Communication with Main Body ECU | No communication with main body ECU (multiplex network body ECU) | |
| U0151 | Lost Communication with Restraints Control Module | No communication with airbag sensor assembly | |
| U0155 | Lost Communication with Combination Meter | No communication with combination meter assembly | |
| U0163 | Lost Communication with Navigation Control Module | No communication with radio receiver assembly (A/C control panel) | |
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Room Temperature Sensor Circuit (B1411/11)
DESCRIPTION The cooler (room temp. sensor) thermistor is installed in the instrument panel to detect the cabin temperature, which is used to control the air conditioning system. The resistance of the ...
Ambient Temperature Sensor Circuit (B1412/12)
DESCRIPTION The cooler (ambient temp. sensor) thermistor is installed in front of the cooler condenser assembly to detect the ambient temperature, which is used to control the air conditioning system. ...
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Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lighting System (w/o Automatic Headlight Beam Level Control System): Turn Signal Switch Circuit
DESCRIPTION The combination meter assembly receives the turn signal switch information and controls the turn signal lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was insta ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Door Lock Control System: System Description
SYSTEM DESCRIPTION POWER DOOR LOCK CONTROL SYSTEM DESCRIPTION (a) The power door lock system locks/unlocks all doors. The main body ECU (multiplex network body ECU) receives lock/unlock request signals from a door control switch or the driver door key lock and unlock switch. Then, the main body ECU ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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