Lexus NX: Fail-safe Chart
Lexus NX Service Manual / Steering / Steering Column / Heated Steering Wheel System / 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 detection of drive element | Heater output off | |
| Power failure | Low-voltage detection | Heater output off |
| Over-voltage detection | Heater output off | |
| Heater OFF timer | 30 minutes after heated steering wheel system is turned on | Heater output off |
(b) Malfunction detection conditions
(1) When an open or short in the steering wheel heater unit thermistor continues for 2 seconds or more.
(2) When the steering heater switch is pressed continuously for 10 seconds or more.
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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
Components
COMPONENTS ILLUSTRATION *1 DECK FLOOR BOX LH *2 REAR DECK FLOOR BOX *3 NO. 3 DECK BOARD SUB-ASSEMBLY *4 NEGATIVE AUXILIARY BATTERY TERMINAL N*m (kgf*cm, ft.*lbf): Specified
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Components
COMPONENTS ILLUSTRATION *A w/o Power Back Door System *B w/ Power Back Door System *1 BACK DOOR FINISH COVER LH *2 BACK DOOR FINISH COVER RH *3 BACK DOOR LOCK COVER *4 BACK DOOR OUTSIDE GARNISH SUB-ASSEMBLY *5 BACK DOOR SIDE GARNISH LH *6 BACK DOOR SIDE GARNIS
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS
NEXT 3. CONNECT TECHSTREAM TO DLC3* HINT: If the display indicates a communication malfunction, inspect the DLC
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