Lexus NX: Air Conditioning System
- Precaution
- Parts Location
- System Diagram
- System Description
- How To Proceed With Troubleshooting
- Customize Parameters
- Initialization
- Problem Symptoms Table
- Dtc Check / Clear
- Terminals Of Ecu
- Check Mode Procedure
- Data List / Active Test
- Diagnostic Trouble Code Chart
- Room Temperature Sensor Circuit (B1411)
- Ambient Temperature Sensor Circuit (B1412)
- Evaporator Temperature Circuit or Evaporator Fin Thermistor (B1413)
- Open in Pressure Sensor Circuit / Abnormal Refrigerant Pressure (B1423)
- Air Mix Damper Control Servo Motor Circuit (Passenger Side) (B1441)
- Air Inlet Damper Control Servo Motor Circuit (B1442)
- Air Outlet Damper Control Servo Motor Circuit (B1443)
- Air Mix Damper Control Servo Motor Circuit (Driver Side) (B1446)
- Air Outlet Damper Control Servo Motor Circuit (Rear) (B1449)
- A/C Inverter High Voltage Power Resource System Malfunction (B1471)
- A/C Inverter High Voltage Output System Malfunction (B1472)
- A/C Inverter Start-up Signal System Malfunction (B1473)
- A/C Inverter Malfunction (B1474)
- A/C Inverter Cooling / Heating System Malfunction (B1475)
- A/C Inverter Load System Malfunction (B1476)
- A/C Inverter Low Voltage Power Resource System Malfunction (B1477)
- Communication Malfunction (Bus Ic) (B1497)
- Communication Malfunction (A/C Inverter Local) (B1498)
- Glass Temperature Sensor Circuit (B14A8)
- Glass Surroundings Temperature Sensor Circuit (B14A9)
- Glass Humidity Sensor Circuit (B14AA)
- Lost Communication with Front Panel LIN (B14B2)
- Refrigerant Shortage (B14B8)
- Hybrid Battery Voltage System Isolation Fault (P0AA6-611)
- Lost Communication with ECM / PCM "A" (U0100-U0142,U0155,U0163,U0293)
- Blower Motor Circuit
- Heater Water Pump Circuit
- PTC Heater Circuit
- Ambient Temperature Display System
- ECO Switch Circuit
- IG Power Source Circuit
- Back-up Power Source Circuit
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Precaution
PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTICE:
After the power switch is turned off, there may be a waiting time before disconnecting the negative (-
Parts Location
PARTS LOCATION ILLUSTRATION *A for 2WD *B for AWD *1 AIR CONDITIONING TUBE AND ACCESSORY ASSEMBLY (AIR CONDITIONER PRESSURE SENSOR) *2 THERMISTOR ASSEMBLY (AMBIENT TEMPERATURE SENS
System Diagram
SYSTEM DIAGRAM Communication Table Sender Receiver Signal Communication Line Air conditioning amplifier assembly Hybrid vehicle control ECU Heater idle up request signal CAN
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Inspection
INSPECTION PROCEDURE 1. INSPECT COOLER THERMISTOR (ROOM TEMPERATURE SENSOR) (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 1 - 2 10°C (50°F) 3.00 to 3.73 kΩ 15°C (59°F) 2.45 t
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Click here HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in
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