Lexus NX: Diagnosis System

DIAGNOSIS SYSTEM

DESCRIPTION

The ECU stores DTCs when malfunctions occur.

The diagnostic system allows for reading of the DTCs from the DLC3.

Use the Techstream to check for malfunctions and perform repairs.

CHECK DLC3

(a) Check the DLC3.

Click here

INSPECT AUXILIARY BATTERY VOLTAGE

(a) Measure the auxiliary battery voltage.

Standard voltage:

11 to 14 V (power switch off)

If the voltage is below 11 V, recharge or replace the auxiliary battery.

SELF-DIAGNOSTIC MODE (USING TECHSTREAM)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Entry&Start / Utility / Wireless Door Lock Diagnosis Mode.

Body Electrical > Smart Access > Utility

Tester Display

Wireless Door Lock Diagnosis Mode

(e) Proceed to the next step in accordance with the prompts on the Techstream screen.

(f) Check that the system has switched to self-diagnostic mode by checking the wireless door lock buzzer output pattern.

(g) Check the diagnostic outputs when an electrical key transmitter sub-assembly switch is pressed. The diagnostic outputs can be checked by the interior light and wireless door lock buzzer patterns.

Result

Wireless Door Lock Buzzer Output

Suspected Area

A

Normal (No malfunction)

B

Register wireless code

C

Wave interference or malfunction of a related component

READ NEXT:

 Dtc Check / Clear

DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Smart Access / Troub

 Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. Th

 Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Wireless Door Lock Control System DTC No. Detection Item Link B1242 Wireless Door Lock Tuner Circuit Malfunction

SEE MORE:

 Calibration

CALIBRATION TORQUE SENSOR ZERO POINT CALIBRATION (USING THE Techstream) NOTICE: Perform torque sensor zero point calibration if any of the following conditions occur: The power steering ECU assembly has been replaced. The electric power steering column sub-assembly has been replaced. There is

 Parking brake

The parking brake can be set or released automatically or manually. In automatic mode, the parking brake can be set or released automatically according to shift lever operation. Also, even in automatic mode, the parking brake can be set or released manually. Operating instructions ■ Tur

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