Lexus NX: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure to troubleshoot the intuitive parking assist system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

NEXT

3.

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, replace or recharge the auxiliary battery before proceeding to the next step.

NEXT

4.

CHECK CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Click here

Result

Proceed to

CAN communication system DTCs are not output

A

CAN communication system DTCs are output

B

B

GO TO CAN COMMUNICATION SYSTEM

A

5.

PROBLEM SYMPTOM CONFIRMATION

NEXT

6.

CHECK DTC*

(a) Check for DTCs.

Click here

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

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 8

C

GO TO STEP 9

A

7.

DIAGNOSTIC TROUBLE CODE CHART (INTUITIVE PARKING ASSIST SYSTEM)

(a) Refer to Diagnostic Trouble Code Chart.

Click here

NOTICE:

The clearance warning ECU assembly outputs DTCs for the following system. When DTCs other than those in Diagnostic Trouble Code Chart for the intuitive parking assist system are output, refer to Diagnostic Trouble Code Chart for the relevant systems.

System

Proceed to

Intelligent Clearance Sonar System

NEXT

GO TO STEP 11

8.

SYMPTOM SIMULATION

(a) Refer to Symptom Simulation.

Click here

NEXT

9.

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

B

GO TO STEP 11

A

10.

OVERALL ANALYSIS AND TROUBLESHOOTING

(a) Operation Check

Click here

(b) Terminals of ECU

Click here

(c) Data List / Active Test

Click here

NEXT

11.

CIRCUIT INSPECTION

NEXT

12.

IDENTIFICATION OF PROBLEM

NEXT

13.

REPAIR OR REPLACE

NEXT

14.

CONFIRMATION TEST

NEXT

END

READ NEXT:

 Operation Check

OPERATION CHECK INITIAL CHECK (a) Power switch on (IG) (intuitive parking assist system off). (b) Intuitive parking assist system on and check an indication state of the vehicle mark. OK: The initial

 Customize Parameters

CUSTOMIZE PARAMETERS CUSTOMIZE INTUITIVE PARKING ASSIST SYSTEM (a) Customizing with the Techstream. NOTICE: When the customer requests a change in a function, first make sure that the function can

 Calibration

CALIBRATION NOTICE: When any of the following parts have been replaced, perform adjustment shown in the following table. If not, the intuitive parking assist system may not operate correctly. ADJUST I

SEE MORE:

 Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Pre-collision System DTC No. Detection Item Link C142571 Stop Light Relay Actuator Stuck U012587 Lost Communication With Multi-axis Acceleration Sensor Module Missing Message U012687 Lost Communication with Steering Angle Sensor Module

 Components

COMPONENTS ILLUSTRATION *A for 8 Speakers *B for 10 Speakers *C for 14 Speakers - - *1 REAR DOOR INSIDE HANDLE BEZEL PLUG LH *2 REAR DOOR TRIM BOARD SUB-ASSEMBLY LH *3 REAR DOOR TRIM COVER LH *4 REAR NO. 2 SPEAKER ASSEMBLY *5 REAR POWER WINDOW REGULATOR

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