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.

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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 Terminals Of Ecu

TERMINALS OF ECU HINT: Perform the inspection from the harness side with the connectors connected. STEERING HEATER AND VIBRATION ECU (a) Measure the voltage or resistance according to the value(s) in

 Fail-safe Chart

FAIL-SAFE CHART MALFUNCTION DETECTION (a) Operation when malfunction is detected Content Operation Heater failure Overcurrent detection of drive element Heater output off Overheating

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

DESCRIPTION Click here WIRING DIAGRAM Click here CAUTION / NOTICE / HINT HINT: Inspect the fuses for circuits related to this system before performing the following inspection procedure. The

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 Inspection

INSPECTION PROCEDURE 1. INSPECT STEERING PAD SWITCH ASSEMBLY (a) Measure the resistance according to the value(s) in the table below. *A w/ Lane Departure Alert System - - *1 SEEK+ *2 SEEK- *3 VOL+ *4 VOL- *5 MODE *6 VOICE *7 OFF HOOK *8 ON HOOK

 Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Smart Access System with Push-button Start (for Start Function) DTC No. Detection Item Link B2271 Ignition Hold Monitor Malfunction B2274 ACC Monitor Malfunction B2275 STSW Monitor Malfunction B2277 Detecting Vehicle Submers

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