Lexus NX: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

*: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

(a) Interview the customer and confirm the problem.

Click here

NEXT

3.

CHECK DTC AND FREEZE FRAME DATA*

(a) Check and record DTCs and Freeze Frame Data.

for DTC Check / Clear: Click here

for Freeze Frame Data: Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

(b) Clear the DTCs and Freeze Frame Data.

for DTC Check / Clear: Click here

for Freeze Frame Data: Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(c) Reconfirm the DTCs.

(1) Reconfirm the DTCs based on the recorded DTCs and Freeze Frame Data.

Chassis > ABS/VSC/TRAC > Trouble Codes

HINT:

  • When CAN communication system DTCs are output, repair the CAN communication system first.

    Click here

  • If DTCs U0123, U0124, U0126, and/or U0293 is output together with a CAN communication DTC, first check the appropriate sensor for a momentary open circuit.

    Click here

  • If the Techstream cannot communicate with the skid control ECU (brake booster with master cylinder assembly), inspect the CAN communication system.

    Click here

  • If there is no response from the skid control ECU (brake booster with master cylinder assembly), inspect the IG1 circuit of the skid control ECU (brake booster with master cylinder assembly).

    Click here

Result

Proceed to

DTCs are output.

A

DTCs are not output. (Problem symptom does not occur.)

B

DTCs are not output. (Problem symptom occurs.)

C

B

GO TO STEP 5

C

GO TO STEP 6

A

4.

DIAGNOSTIC TROUBLE CODE CHART

(a) Proceed to Diagnostic Trouble Code Chart.

Click here

NEXT

GO TO STEP 7

5.

SYMPTOM SIMULATION

(a) Proceed to How to Proceed with Troubleshooting.

Click here

NEXT

6.

PROBLEM SYMPTOMS TABLE

(a) Proceed to Problem Symptoms Table.

Click here

NEXT

7.

CIRCUIT INSPECTION*

NEXT

8.

IDENTIFICATION OF PROBLEM

NEXT

9.

REPAIR OR REPLACEMENT

NEXT

10.

CONFIRMATION TEST*

NEXT

END

READ NEXT:

 Check For Intermittent Problems

CHECK FOR INTERMITTENT PROBLEMS CHECK FOR INTERMITTENT PROBLEMS HINT: A momentary interruption (open circuit) in the connectors and/or wire harnesses between the sensors and ECUs can be detected using

 Initialization

INITIALIZATION DESCRIPTION (a) Perform initialization and calibration of the linear solenoid valve when the brake booster with master cylinder assembly, brake pedal stroke sensor assembly or brake ped

 Calibration

CALIBRATION DESCRIPTION (a) After replacing any VSC related components or performing wheel alignment adjustment, clear and read the sensor calibration data. Refer to the table below and then perform t

SEE MORE:

 Parts Location

PARTS LOCATION ILLUSTRATION *1 FRONT WIPER DEICER RELAY *2 AIR CONDITIONING AMPLIFIER ASSEMBLY *3 MULTI-DISPLAY ASSEMBLY *4 RADIO RECEIVER ASSEMBLY *5 WINDSHIELD GLASS - WINDSHIELD DEICER WIRE *6 NO. 2 ENGINE ROOM RELAY BLOCK *7 DEICER FUSE *8 ECU-B NO.2 FUSE

 Precaution

PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTICE: After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Click here When disconnecting and reconnecting the a

© 2016-2025 Copyright www.lexunx.com