Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedures to troubleshoot the power mirror control system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | CUSTOMER PROBLEM ANALYSIS CHECK |
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, whether the problem occurred recently or has been occurring for a long time |
| Where | Whether the problem occurs at a specific location |
| Under what conditions? | Whether the doors were locked or unlocked, whether the power switch was on (IG), whether the hybrid control system was started |
| How did it happen? | Problem symptoms |
|
| 3. | INSPECT AUXILIARY BATTERY VOLTAGE |
(a) Measure the auxiliary battery voltage with the power switch off.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.
|
| 4. | CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* |
(a) Use the Techstream to check if the LIN communication system is functioning normally.
Click here .gif)
| Result | Proceed to |
|---|---|
| LIN DTC is not output | A |
| LIN DTC is output | B |
| B | .gif) | GO TO LIN COMMUNICATION SYSTEM |
|
| 5. | CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Use the Techstream to check if the CAN communication system is functioning normally.
Click here
| Result | Proceed to |
|---|---|
| CAN DTC is not output | A |
| CAN DTC is output | B |
| B | | GO TO CAN COMMUNICATION SYSTEM |
|
| 6. | 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 |
|
| 7. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Data List / Active Test
Click here
(b) Terminals of ECU
Click here
(c) Operation Check
Click here
|
| 8. | REPAIR OR REPLACE |
|
| 9. | CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
Operation Check
OPERATION CHECK CHECK OUTER MIRROR SWITCH FUNCTION (a) Turn the power switch on (ACC). (b) With the mirror select switch set to L, check that the mirror surface moves up, down, left and right normally
Customize Parameters
CUSTOMIZE PARAMETERS CUSTOMIZE POWER MIRROR CONTROL SYSTEM HINT: The following items can be customized. NOTICE:
When the customer requests a change in a function, first make sure that the function
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Click here HINT:
Use the table below to help determine the cause of problem
SEE MORE:
Short in D Squib Circuit (B1800-B1803)
DESCRIPTION The driver side squib circuit consists of the airbag ECU assembly, spiral cable sub-assembly and horn button assembly. The circuit instructs the SRS to deploy when deployment conditions are met. These DTCs are stored when a malfunction is detected in the driver side squib circuit. DTC
SRS Warning Light does not Come ON
DESCRIPTION Refer to "SRS Warning Light Remains ON" Click here WIRING DIAGRAM Refer to "SRS Warning Light Remains ON" Click here CAUTION / NOTICE / HINT NOTICE:
After the power switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
