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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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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Vehicle Speed Signal Circuit between Navigation ECU and Combination Meter
DESCRIPTION The navigation ECU receives a vehicle speed signal from the combination meter assembly. HINT:
A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly.
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE If there are no DTCs but the problem still occurs, check the suspected areas for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page. NOTICE: When replacing the skid control ECU (brake booster with master cylinder assembl
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