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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On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. REMOVE NO. 1 ENGINE UNDER COVER ASSEMBLY Click here 2. INSPECT HYBRID TRANSAXLE FLUID (a) Using a 10 mm hexagon socket wrench, remove the filler plug and gasket from the hybrid vehicle transaxle assembly. *1 Filler Plug *a 0 to 5 mm (0 t
Initialization
INITIALIZATION INITIALIZE MULTIPLEX NETWORK DOOR ECU NOTICE: Initialization of the multiplex network door ECU (back door initial position learning) is necessary if the following work procedures are performed while the back door is open.
The cable to the negative (-) auxiliary battery terminal is
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