Lexus NX: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
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.
Steering System| Symptom | Suspected Area | Link |
|---|---|---|
| Heavy steering | Front tires (Improperly inflated or unevenly worn) | |
| Front wheel alignment (Incorrect) | | |
| Steering system joints (Worn) | - | |
| Electric power steering column sub-assembly | | |
| Power steering motor assembly | | |
| Battery and power source system | | |
| Power steering ECU power source voltage and relay | | |
| Power steering ECU assembly | | |
| Power steering gear | | |
| Steering effort differs between turning right and left, or steering effort is uneven | Calibration of torque sensor zero point is not completed | |
| Front tires (Improperly inflated or unevenly worn) | | |
| Front wheel alignment (Incorrect) | | |
| Front suspension (Lower ball joint) | | |
| Power steering gear | | |
| Power steering motor assembly | | |
| Power steering ECU assembly | | |
| Poor return | Front suspension (Lower ball joint) | |
| Speed sensor circuit | | |
| Power steering motor assembly | | |
| Power steering ECU assembly | | |
| CAN communication system | | |
| Friction sound occurs when steering wheel turned during low-speed driving | Power steering motor assembly | |
| Electric power steering column sub-assembly | | |
| Spiral cable assembly | | |
| Friction between the steering wheel and steering column cover | - | |
| High-pitched sound (squealing sound) occurs when steering wheel turned slowly with vehicle stopped | Power steering motor assembly | |
| Steering wheel installation condition | - | |
| Steering wheel vibrates and noise occurs when steering wheel turned while vehicle stopped | Power steering motor assembly | |
| Electric power steering column sub-assembly | | |
| Steering wheel installation condition | - | |
| No free play or excessive play | Electric power steering column sub-assembly | |
| Steering intermediate shaft assembly | - | |
| Power steering warning light remains on | Power Steering Warning Light Circuit | |
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READ NEXT:
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. CHECK STEERING WHEEL FREE PLAY (a) Stop the vehicle and align the tires facing straight ahead. (b) Turn the steering wheel assembly gently right and left, and che
Adjustment
ADJUSTMENT PROCEDURE 1. STEERING OFF CENTER ADJUSTMENT HINT: This is the adjustment procedure for when the steering is off-center. (a) Check if the steering wheel is off-center. (1) Apply masking t
SEE MORE:
Horn Circuit
DESCRIPTION When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (multiplex network body ECU) transmits a signal to cause the horn to sound at intervals of 0.4 seconds. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for ci
System Description
SYSTEM DESCRIPTION CAN COMMUNICATION SYSTEM (a) The blind spot monitor system uses CAN communication to transmit data between the right and left blind spot monitor sensors and each ECU. (b) If there is a problem in the CAN communication, the right and left blind spot monitor sensors output a CAN com
