Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedures to troubleshoot the steering lock system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | CUSTOMER PROBLEM ANALYSIS |
(a) Interview the customer and confirm the problem.
Click here .gif)
|
| 3. | CHECK AUXILIARY BATTERY VOLTAGE |
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
HINT:
A simple method to determine whether the auxiliary battery is depleted is to operate the horn.
|
| 4. | CHECK DTC* |
(a) Check for DTCs and make a note of any codes that are output.
Click here
HINT:
When DTCs indicating CAN and/or LIN communication system malfunctions are output, repair the CAN and/or LIN communication systems before performing diagnosis.
for CAN communication system: Click here
for LIN communication system: Click here
| Result | Proceed to |
|---|---|
| DTCs are not output. (Problem symptom cannot be confirmed or reproduced.) | A |
| DTCs are not output. (Problem symptom can be confirmed and reproduced.) | B |
| Steering lock system DTCs are output. | C |
HINT:
-
When steering lock system DTCs are output, refer to Diagnostic Trouble Code Chart.
Click here
- The steering lock system does not store history DTCs.
| B | .gif) | GO TO STEP 6 |
| C | | GO TO STEP 8 |
|
| 5. | SYMPTOM SIMULATION |
(a) Proceed to How to Proceed with Troubleshooting.
Click here
|
| 6. | PROBLEM SYMPTOMS TABLE |
(a) Proceed 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 | | GO TO STEP 8 |
|
| 7. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Proceed to Data List / Active Test.
Click here
(b) Proceed to Terminals of ECU.
Click here
| NEXT | | GO TO STEP 9 |
| 8. | CIRCUIT INSPECTION* |
|
| 9. | REPAIR OR REPLACE |
|
| 10. | CHECK DTC AGAIN* |
(a) Clear the DTCs.
Click here
(b) Check for DTCs and make a note of any codes that are output.
Click here
HINT:
Perform the DTC output confirmation operation.
| Result | Proceed to |
|---|---|
| DTCs are not output. | A |
| Steering lock system DTCs are output. | B |
| A | | END |
| B | | GO TO DIAGNOSTIC TROUBLE CODE CHART |
READ NEXT:
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of
Terminals Of Ecu
TERMINALS OF ECU TERMINAL INSPECTION *a Component without harness connected (Steering Lock ECU (Steering Lock Actuator Assembly)) - - (a) Measure the voltage and resistance according to t
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION NOTICE:
When using the Techstream with the power switch off to confirm DTCs or Data List information related to the smart access system with push button start, the Tech
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On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT RAIN SENSOR (a) Remove the rain sensor cover. Click here (b) Disconnect the rain sensor connector. *a Front view of wire harness connector (to Rain Sensor) (c) Measure the voltage according to the value(s) in the table below. St
DC / DC Converter Status Circuit (P0A08-264)
DESCRIPTION The DC/DC converter converts the DC 244.8 V of the HV battery into DC 12 V in order to supply power to areas such as the vehicle's lighting, audio, and ECU systems. In addition, it charges the auxiliary battery. A transistor bridge circuit initially converts DC 244.8 V into alternating c
