Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the automatic high beam system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
.gif)
| 2. | INSPECT AUXILIARY BATTERY VOLTAGE |
(a) Measure the auxiliary battery voltage with 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 GTS 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
(b) Clear the DTCs.
Click here
(c) Recheck for DTCs by simulating the operation indicated by the DTCs.
Click here
| 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 HIGH BEAM SYSTEM OPERATION CHECK (a) Check the operation of the automatic high beam indicator light. *a Automatic High Beam Indicator Light NOTICE: If the forward re
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE:
When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the i
Terminals Of Ecu
TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *1 Main Body ECU (Multiplex Network Body ECU) - - (a) Measure the voltage an
SEE MORE:
Security Horn Circuit
DESCRIPTION When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (multiplex network body ECU) transmits a signal to cause the security horn to sound at intervals of 0.4 seconds. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Inspect the
Work Procedure
WORK PROCEDURE PROCEDURES NECESSARY WHEN ECU OR OTHER PARTS ARE REPLACED Replacement Part Necessary Procedure Effect/Inoperative Function when Necessary Procedures are not Performed Link
*1: w/ SXM System
*2: The vehicle height changes because of suspension or tire replacement *3: w/ Ha
