Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the lighting system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | 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 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.
|
| 3. | CHECK CAN COMMUNICATION SYSTEM* |
(a) Use the Techstream to check if the CAN communication system is functioning normally.
Click here .gif)
OK:
CAN communication system DTCs are not output.
| NG | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
| 4. | CHECK FOR DTC* |
(a) Check for DTCs and note any codes that are output.
Click here
(1) Body Electrical / Main Body / Trouble Codes.
Body Electrical > Main Body > Trouble Codes(2) Body Electrical / Front Recognition Camera (Front Lighting Control) / Trouble Codes.
Body Electrical > Front Recognition Camera (Front Lighting Control) > Trouble Codes(b) Clear the DTCs.
Click here
(1) Body Electrical / Main Body / Clear DTCs.
Body Electrical > Main Body > Clear DTCs(2) Body Electrical / Front Recognition Camera (Front Lighting Control) / Clear DTCs.
Body Electrical > Front Recognition Camera (Front Lighting Control) > Clear DTCs(c) Recheck for DTCs by simulating the operation indicated by the DTCs.
Click here
(1) Body Electrical / Main Body / Trouble Codes.
Body Electrical > Main Body > Trouble Codes(2) Body Electrical / Front Recognition Camera (Front Lighting Control) / Trouble Codes.
Body Electrical > Front Recognition Camera (Front Lighting Control) > Trouble Codes| Result | Proceed to |
|---|---|
| Malfunction is duplicated but DTCs are not output | A |
| DTCs are output | B |
| Malfunction cannot be duplicated and DTCs are not output | C |
| B | | GO TO DIAGNOSTIC TROUBLE CODE CHART |
| C | | USE SIMULATION METHOD TO CHECK |
|
| 5. | CHECK FOR VEHICLE CONTROL HISTORY* (FRONT RECOGNITION CAMERA (FRONT LIGHTING CONTROL)) |
HINT:
Refer to Vehicle Control History.
Click here
(a) Check for vehicle control history and note any codes that are output.
Body Electrical > Front Recognition Camera (Front Lighting Control) > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
| Result | Proceed to |
|---|---|
| No vehicle control history is output | A |
| X2020 or X204D is output | B |
| Any vehicle control history other than X2020 and X204D is output | C |
| B | | GO TO VEHICLE CONTROL HISTORY |
| C | | GO TO STEP 7 |
|
| 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 |
| A | | USE SIMULATION METHOD TO CHECK |
| B | | ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE |
| 7. | RECHECK FOR VEHICLE CONTROL HISTORY* (FRONT RECOGNITION CAMERA (FRONT LIGHTING CONTROL)) |
HINT:
Refer to Vehicle Control History.
Click here
(a) Clear the vehicle control history.
Body Electrical > Front Recognition Camera (Front Lighting Control) > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
(b) Recheck for vehicle control history.
(1) Check if any vehicle control history is output.
Body Electrical > Front Recognition Camera (Front Lighting Control) > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
| Result | Proceed to |
|---|---|
| Vehicle control history is not output | A |
| Vehicle control history is output | B |
| A | | USE SIMULATION METHOD TO CHECK |
| B | | GO TO VEHICLE CONTROL HISTORY |
READ NEXT:
Operation Check
OPERATION CHECK AUTOMATIC LIGHT CONTROL SYSTEM OPERATION CHECK (a) Turn the power switch on (IG). (b) Turn the headlight dimmer switch to the AUTO position. (c) Cover the automatic light control senso
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When the customer requests a change in a function, first make sure that the function can be customized.
Record the current settings be
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE:
Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
If the main body ECU (multiplex network body ECU) is repla
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