Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the sliding roof system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
.gif)
| 2. | CUSTOMER PROBLEM ANALYSIS |
HINT:
- In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
- Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
-
The following 5 items are important points for problem analysis:
What
Vehicle model, system name
When
Date, time, occurrence frequency
Where
Road conditions
Under what conditions?
Driving conditions, weather conditions
How did it happen?
Problem symptoms
|
| 3. | INSPECT AUXILIARY BATTERY VOLTAGE |
(a) Measure the auxiliary battery voltage.
Standard voltage:
11 to 14 V (power switch off)
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
(b) Check the fuses and relays.
(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.
|
| 4. | INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check for CAN communication system DTCs.
Click here .gif)
| Result | Proceed to |
|---|---|
| CAN DTCs are not output | A |
| CAN DTCs are output | B |
| B | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
| 5. | INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check for LIN communication system DTCs.
Click here
| Result | Proceed to |
|---|---|
| LIN DTCs are not output | A |
| LIN DTCs are output | B |
| B | | GO TO LIN COMMUNICATION SYSTEM |
|
| 6. | CHECK FOR DTC* |
(a) Check for DTCs and make a note of any codes that are output.
Click here
(b) Clear the DTCs.
Body Electrical > Sliding Roof > Clear DTCs(c) Recheck for DTCs.
Body Electrical > Sliding Roof > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| B | | GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
| 7. | PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
| Result | Proceed to |
|---|---|
| Fault is not listed in problem symptoms table | A |
| Fault is listed in problem symptoms table | B |
| B | | ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE |
|
| 8. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Operation Check
Click here
(b) Terminals of ECU
Click here
(c) Data List / Active Test
Click here
(d) Inspection
|
| 9. | ADJUST, REPAIR OR REPLACE |
|
| 10. | INITIALIZE SLIDING ROOF SYSTEM |
(a) Initialize the sliding roof drive gear sub-assembly (sliding roof ECU).
Click here
|
| 11. | CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
Operation Check
OPERATION CHECK CHECK SLIDING ROOF NOTICE:
If the negative battery terminal is disconnected under the following conditions, initialization of the sliding roof drive gear sub-assembly may not be com
Customize Parameters
CUSTOMIZE PARAMETERS CUSTOMIZE SLIDING ROOF SYSTEM HINT: The following items can be customized. NOTICE:
When the customer requests a change in a function, first make sure that the function can be c
Initialization
INITIALIZATION INITIALIZE SLIDING ROOF SYSTEM NOTICE:
When the roof glass is adjusted or removed/installed, or the sliding roof drive gear sub-assembly is replaced, the glass position cannot be det
SEE MORE:
Inspection
INSPECTION PROCEDURE 1. INSPECT FRONT LOWER BALL JOINT ASSEMBLY LH (a) Inspect the turning torque of the ball joint. (1) Secure the front lower ball joint in a vise using aluminum plates. (2) Install the nut to the front lower ball joint stud. (3) Move the stud back and forth several times. Using
Check Mode Procedure
CHECK MODE PROCEDURE HINT: Compared to normal mode, check mode is more sensitive to malfunctions. Therefore, check mode can detect malfunctions that cannot be detected in normal mode. NOTICE: All the stored DTCs and freeze frame data are cleared if: 1) the ECM is changed from normal mode to check mo
