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.
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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:
Initialization
INITIALIZATION INITIALIZE PARKING ASSIST MONITOR SYSTEM (a) When the "!" mark is displayed on the multi-display assembly, correct the steering angle neutral point using the following method. (1) Fully turn the steering wheel to the right and left on flat ground. NOTICE: Memorizing the steering angle
System Description
SYSTEM DESCRIPTION ILLUMINATION CONTROL SYSTEM (Illuminated Entry System) HINT: When inspecting the following functions, make sure that the map light switch and spot light switch are in the DOOR position. (a) The illuminated entry system has the following control functions: Control Outline Li
