Lexus NX: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use these procedures to troubleshoot the lane tracing assist system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

INSPECT AUXILIARY BATTERY VOLTAGE

(a) Measure the auxiliary battery voltage with the power switch off.

Standard voltage:

11 to 14 V (Power switch off)

If the voltage is below 11 V, replace or recharge the auxiliary battery before proceeding to the next step.

NEXT

3.

CHECK CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check if the CAN communication system is functioning normally.

HINT:

Refer to CAN Bus Check in CAN Communication System.

Click here

OK:

CAN communication system is functioning normally.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

4.

CHECK FOR DTC*

HINT:

Refer to DTC Check / Clear.

Click here

(a) Clear the DTCs.

Chassis > Lane Control > Clear DTCs

(b) Reproduce the detection conditions of the recorded DTC.

Chassis > Lane Control > Trouble Codes

(c) Attempt to duplicate the malfunction and check if the DTCs are output again.

Chassis > Lane Control > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO STEP 6

A

5.

CHECK FOR VEHICLE CONTROL HISTORY*

(a) Check for vehicle control history and note any codes that are output.

Click here

Chassis > Lane 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 STEP 7

6.

CHECK FOR DTC*

HINT:

Refer to DTC Check / Clear.

Click here

(a) Check for DTCs and note any codes that are output.

Chassis > Lane Control > Trouble Codes

(b) Clear the DTCs.

Chassis > Lane Control > Clear DTCs

(c) Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs.

Chassis > Lane Control > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

7.

CHECK FOR VEHICLE CONTROL HISTORY*

(a) Check for vehicle control history and note any codes that are output.

Click here

Chassis > Lane 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

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