Lexus NX: Steering Pad Switch Circuit
DESCRIPTION
The forward recognition camera receives the LTA/LDA main switch on/off signal from the steering pad switch assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
During the steering pad switch assembly check, check the precautions for the airbag system since the horn button assembly is removed during servicing (installation/removal of parts, checks, replacement, etc.).
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PROCEDURE
| 1. | READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / Lane Control / Data List.
Chassis > Lane Control > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| LDA Control | A lane tracing assist system shows whether possibility is in control state | Permission / suppression | Prohibition: A lane tracing assistant player is impossible of system control Permission: Lane tracing assist system control is possible | - |
| Tester Display |
|---|
| LDA Control |
(e) Read the Data List according to the display on the Techstream.
| Result | Proceed to |
|---|---|
| The value of each Data List item changes according to the operation of the LTA/LDA main switch. | A |
| The value of each Data List item does not change according to the operation of the LTA/LDA main switch. | B |
| A | .gif) | TO THE NEXT CHECK CIRCUIT SHOWN IN THE PROBREM SYMPTOMS TABLE |
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| 2. | INSPECT STEERING PAD SWITCH ASSEMBLY |
(a) Remove the steering pad switch assembly.
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(b) Inspect the steering pad switch assembly.
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| NG | | REPLACE STEERING PAD SWITCH ASSEMBLY |
|
| 3. | INSPECT SPIRAL CABLE SUB-ASSEMBLY |
(a) Remove the spiral cable sub-assembly.
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(b) Inspect the spiral cable sub-assembly.
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| NG | | REPLACE SPIRAL CABLE SUB-ASSEMBLY |
|
| 4. | CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA) |
(a) Disconnect the I4 spiral cable sub-assembly connector.
(b) Disconnect the T18 forward recognition camera connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I4-12 (DIST) - T18-3 (LKSW) | Always | Below 1 Ω |
| I4-12 (DIST) or T18-3 (LKSW) - Body Ground | Always | 10 kΩ higher |
(d) Connect the I4 spiral cable sub-assembly connector.
(e) Connect the T18 forward recognition camera connector.
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. | CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND) |
(a) Disconnect the spiral cable sub-assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I4-2 (ECC) - Body ground | Always | Below 1 Ω |
(c) Connect the spiral cable sub-assembly connector.
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Indicator Circuit
DESCRIPTION The LTA/LDA indicator output request signal is sent from the forward recognition camera to the combination meter assembly via CAN communication. CAUTION / NOTICE / HINT NOTICE:
When rep
Removal
REMOVAL PROCEDURE 1. REMOVE FRONT BUMPER ASSEMBLY (a) for Sport Package: Click here (b) except Sport Package: Click here 2. REMOVE MILLIMETER WAVE RADAR SENSOR ASSEMBLY NOTICE: Do not reuse the mi
SEE MORE:
Removal
REMOVAL PROCEDURE 1. REMOVE FRONT DOOR TRIM COVER LH Click here 2. REMOVE FRONT DOOR INSIDE HANDLE BEZEL PLUG LH Click here 3. REMOVE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY WITH FRONT DOOR ARMREST BASE PANEL Click here 4. REMOVE FRONT DOOR TRIM BOARD SUB-ASSEMBLY LH Click here 5.
Replacement
REPLACEMENT PROCEDURE 1. REPLACE HYBRID TRANSAXLE FLUID (a) Be sure that the vehicle remains level and lift the vehicle. [*1] (b) Remove the No. 1 engine under cover assembly. Click here (c) Using a 10 mm hexagon socket wrench, remove the filler plug and gasket from the hybrid vehicle transaxle
