Lexus NX: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
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If the auxiliary battery voltage is low, the climate control seat system may not operate. When "High Power Consumption Partial Limit On AC/Heater Operation." is displayed on the multi-information display in the combination meter assembly, inspect the auxiliary battery, referring to On-vehicle Inspection for the charging system.
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HINT:
If the auxiliary battery voltage is low, "Operation Limitation Control History Count (Level 1)" and "Operation Limitation Control History Count (Level 2) is counted.
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If the auxiliary battery voltage is low, the climate control seat system may not operate. Refer to Data List for the power steering system.
for Manual Tilt and Manual Telescopic Steering Column: Click here
for Power Tilt and Power Telescopic Steering Column: 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 order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Seat blower volume is low (front RH seat). | Check that the air ducts are not disconnected or damaged | |
| Seat cushion climate control blower assembly LH | | |
| Seatback climate control blower LH | | |
| Seat blower volume is low (front LH seat). | Check that the air ducts are not disconnected or damaged | |
| Seat cushion climate control blower assembly RH | | |
| Seatback climate control blower RH | | |
| Seat blower volume does not change (front RH seat). | Air conditioning control assembly | |
| Seat cushion climate control blower assembly LH | | |
| Seatback climate control blower LH | | |
| Air conditioning amplifier assembly | | |
| Seat blower volume does not change (for LH seat). | Air conditioning control assembly | |
| Seat cushion climate control blower assembly RH | | |
| Seatback climate control blower RH | | |
| Air conditioning amplifier assembly | | |
| Climate control seat system does not all operate. | Harness or connector | - |
| Air conditioning control assembly | | |
| Air conditioning amplifier assembly | | |
| Climate control seat system does not operate on driver side. | Proceed to "Climate Control Seat System does not Operate on Driver Side" | |
| Climate control seat system does not operate on front passenger side. | Proceed to "Climate Control Seat System does not Operate on Passenger Side" | |
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Terminals Of Ecu
TERMINALS OF ECU CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (a) Disconnect the I50 air conditioning amplifier assembly connector. (b) Measure the voltage and resistance according to the value(s) in th
Diagnosis System
DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here INSPECT AUXILIARY BATTERY VOLTAGE (a) Check the auxiliary battery voltage. Standard voltage: 11 to 14 V (power switch off) If the voltage
Climate Control System does not Operate on Driver Side
DESCRIPTION The air conditioning control assembly sends operation signals to the air conditioning amplifier assembly via the LIN communication line. The air conditioning amplifier assembly actives the
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Components
COMPONENTS ILLUSTRATION *1 DECK FLOOR BOX LH *2 NO. 3 DECK BOARD SUB-ASSEMBLY *3 REAR DECK FLOOR BOX *4 NEGATIVE AUXILIARY BATTERY TERMINAL N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION *1 REAR FLEXIBLE HOSE LH *2 UNION BOLT *3 GASKET -
Steering Angle Sensor Communication Error (C1784)
DESCRIPTION Steering sensor signals are sent to the absorber control ECU via CAN communication. When there is a communication malfunction, the malfunction will be detected by the diagnosis function. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate C1784 S
