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

-

READ NEXT:

 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

SEE MORE:

 Removal

REMOVAL PROCEDURE 1. REMOVE CONSOLE ARMREST ASSEMBLY Click here 2. REMOVE UPPER NO. 2 CONSOLE PANEL GARNISH Click here 3. REMOVE INSTRUMENT SIDE PANEL LH Click here 4. REMOVE NO. 1 INSTRUMENT PANEL SAFETY PAD SUB-ASSEMBLY Click here 5. REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-AS

 On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT STOP LIGHT CONTROL ECU ASSEMBLY (a) Disconnect the stop light control ECU assembly connector. *a Front view of wire harness connector (to Stop Light Control ECU Assembly) (b) Measure the voltage and resistance on the wire harness

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