Lexus NX: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Air Conditioning System| DTC No. | Detection Item | Memory | Link |
|---|---|---|---|
| B1411 | Room Temperature Sensor Circuit | Memorized (4 seconds or more) | |
| B1412 | Ambient Temperature Sensor Circuit | Memorized (4 seconds or more) | |
| B1413 | Evaporator Temperature Circuit or Evaporator Fin Thermistor | Memorized (4 seconds or more) | |
| B1423 | Open in Pressure Sensor Circuit / Abnormal Refrigerant Pressure | - | |
| B1441 | Air Mix Damper Control Servo Motor Circuit (Passenger Side) | Memorized (30 seconds or more) | |
| B1442 | Air Inlet Damper Control Servo Motor Circuit | Memorized (30 seconds or more) | |
| B1443 | Air Outlet Damper Control Servo Motor Circuit | Memorized (30 seconds or more) | |
| B1446 | Air Mix Damper Control Servo Motor Circuit (Driver Side) | Memorized (30 seconds or more) | |
| B1449 | Air Outlet Damper Control Servo Motor Circuit (Rear) | Memorized (30 seconds or more)* | |
| B1471 | A/C Inverter High Voltage Power Resource System Malfunction | Memorized | |
| B1472 | A/C Inverter High Voltage Output System Malfunction | Memorized | |
| B1473 | A/C Inverter Start-up Signal System Malfunction | - | |
| B1474 | A/C Inverter Malfunction | Memorized | |
| B1475 | A/C Inverter Cooling / Heating System Malfunction | Memorized | |
| B1476 | A/C Inverter Load System Malfunction | Memorized | |
| B1477 | A/C Inverter Low Voltage Power Resource System Malfunction | Memorized | |
| B1497 | Communication Malfunction (Bus Ic) | Memorized (10 seconds or more) | |
| B1498 | Communication Malfunction (A/C Inverter Local) | Memorized | |
| B14A8 | Glass Temperature Sensor Circuit | Memorized (4 seconds or more)* | |
| B14A9 | Glass Surroundings Temperature Sensor Circuit | Memorized (4 seconds or more)* | |
| B14AA | Glass Humidity Sensor Circuit | Memorized (4 seconds or more)* | |
| B14B2 | Lost Communication with Front Panel LIN | Memorized (10 seconds or more) | |
| B14B8 | Refrigerant Shortage | Memorized (15 minutes or more) | |
| P0AA6-611 | Hybrid Battery Voltage System Isolation Fault | Memorized | |
| U0100 | Lost Communication with ECM / PCM "A" | - | |
| U0131 | Lost Communication with Power Steering Control Module | - | |
| U0142 | Lost Communication with Body Control Module "B" | - | |
| U0155 | Lost Communication with Instrument Panel Cluster (IPC) Control Module | - | |
| U0163 | Lost Communication with Navigation Control Module | - | |
| U0293 | Lost Communication with HV ECU | - | |
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Room Temperature Sensor Circuit (B1411)
DESCRIPTION The cooler thermistor (room temperature sensor) is installed in the instrument panel to detect the cabin temperature which is used to control the heater and air conditioning system AUTO mo
Ambient Temperature Sensor Circuit (B1412)
DESCRIPTION The thermistor assembly (ambient temperature sensor) is installed in front of the cooler condenser assembly to detect the ambient temperature which is used to control the air conditioning
Evaporator Temperature Circuit or Evaporator Fin Thermistor (B1413)
DESCRIPTION The No. 1 cooler thermistor (evaporator temperature sensor) is installed on the evaporator in the air conditioner unit to detect the temperature of the air that has passed through the evap
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Open in Bus 3 Main Bus Line
DESCRIPTION There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 6 (CA3H) and 21 (CA3L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. Symptom Trouble Area
Resistance between terminals 6 (CA3H) and 21 (CA3L) of the cent
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 ECO mode switch information signal Engine ON request signal Charging control inhibit sign
