Lexus NX: 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 |
| *9 | UP | *10 | DOWN |
| *11 | LEFT | *12 | RIGHT |
| *13 | ENTER | *14 | TOP |
| *15 | BACK | *16 | ACC |
| *17 | LDA | - | - |
| *a | Component without harness connected (Steering Pad Switch Assembly) | - | - |
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| z3-11 (AU1) - z3-8 (EAU) | No switch pushed | 95 to 105 kΩ |
| SEEK+ switch pushed | Below 2.5 Ω | |
| SEEK- switch pushed | 313 to 345 Ω | |
| Volume+ switch pushed | 950 to 1050 Ω | |
| Volume- switch pushed | 2955 to 3265 Ω | |
| z3-10 (AU2) - z3-8 (EAU) | No switch pushed | 95 to 105 kΩ |
| MODE switch pushed | Below 2.5 Ω | |
| On hook switch pushed | 313 to 345 Ω | |
| Off hook switch pushed | 950 to 1050 Ω | |
| Voice switch pushed | 2955 to 3265 Ω | |
| z3-3 (+DP2) - z3-8 (EAU) | No switch pushed | 95 to 105 kΩ |
| Left switch pushed | Below 2.5 Ω | |
| Up switch pushed | 313 to 345 Ω | |
| Down switch pushed | 950 to 1050 Ω | |
| Right switch pushed | 2955 to 3265 Ω | |
| z3-2 (+DP) - z3-8 (EAU) | No switch pushed | 95 to 105 kΩ |
| Enter switch pushed | Below 2.5 Ω | |
| Top switch pushed | 313 to 345 Ω | |
| Back switch pushed | 950 to 1050 Ω | |
| z3-4 (DIST)* - z3-7 (ECC) | No switch pushed | 1 MΩ or higher |
| Distance control switch pushed | Below 2.5 Ω | |
| Lane departure alert main switch pushed | 228 to 252 Ω | |
| z3-1 (HO) - A-1 (HO) | Always | Below 2.5 Ω |
| z3-7 (ECC) - z12-1 (ECC) | Always | Below 2.5 Ω |
| z3-12 (CCS) - z12-3 (CCS) | Always | Below 2.5 Ω |
- *: w/ Lane Departure Alert System
HINT:
If the result is not as specified, replace the steering pad switch assembly.
(b) Check the illumination.
(1) Connect a battery positive (+) lead to terminal z3-5 (IL+2) and a negative (-) lead to terminal z3-9 (ILL-) of the steering pad switch assembly connector.
(2) Check that the switch illumination comes on.
OK:
Steering pad switch illumination comes on.
HINT:
If the result is not as specified, replace the steering pad switch assembly.
READ NEXT:
Installation
INSTALLATION PROCEDURE 1. INSTALL STEERING PAD SWITCH ASSEMBLY (a) Engage the 4 claws and 3 guide pins to install the steering pad switch assembly to the steering wheel sub-assembly. (b) Install the 2
Precaution
PRECAUTION HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM Click here HANDLING PRECAUTIONS FOR STEERING COLUMN (a) When handling the electric power steering column sub-assembly: (1) Avoid any impact to
SEE MORE:
Illumination Circuit
DESCRIPTION Power is supplied to the radio receiver assembly and steering pad switch assembly when the light control switch is in the tail or head position. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components su
System Description
SYSTEM DESCRIPTION GENERAL The windshield deicer thin heater wires are attached to the inside of the windshield glass to help deice the window surface more quickly. The indicator light illuminates while the system is operating. The system automatically turns off after approximately 15 minutes. NOTIC
