Lexus NX: Problem Symptoms Table

Lexus NX Service Manual / Steering / Steering Column / Heated Steering Wheel System / 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.

Heated Steering Wheel System

Symptom	Suspected Area	Link
Steering wheel does not heat up when heated steering wheel switch is pressed	Refer to "Steering wheel does not heat up when heated steering wheel switch is pressed"

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System Diagram

SYSTEM DIAGRAM Communication Table Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method Main Body ECU (Multiplex Network Body ECU) Multiplex Tilt and Telescopic ECU Auto away/return state signal 3Tilt and telescopic position request signal Driver positio

Drive Motor "A" Inverter Performance (P0A78-113)

DTC SUMMARY MALFUNCTION DESCRIPTION This DTC indicates that a large current flowed through the inverter for the motor. The cause of this malfunction may be one of the following: Area Main Malfunction Description Step Inverter low-voltage circuit The connectors are not connected properly

Lexus NX: Problem Symptoms Table

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Terminals Of Ecu

Fail-safe Chart

Steering Wheel does not Heat Up When Heated Steering Wheel Switch is Pressed

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System Diagram

Drive Motor "A" Inverter Performance (P0A78-113)