Lexus NX: Dtc Check / Clear

Lexus NX Service Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System / Dtc Check / Clear

DTC CHECK / CLEAR

CHECK DTC (CHECK USING Techstream)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG) and wait for 90 seconds.

(d) Enter the following menus: Body Electrical / Navigation System / Trouble Codes.

Body Electrical > Navigation System > Trouble Codes

(e) Check for DTCs, and then write them down.

(f) Check the details of the DTC(s).

Click here

CLEAR DTC (CLEAR USING Techstream)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG) and wait for 90 seconds.

(d) Enter the following menus: Body Electrical / Navigation System / Trouble Codes.

Body Electrical > Navigation System > Clear DTCs

(e) Clear the DTCs.

START DIAGNOSTIC MODE

HINT:

Illustrations may differ from the actual vehicle screen depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle screen.
After the power switch is turned on (IG), check that the home is displayed before starting diagnostic mode. Otherwise, some items cannot be checked.
Start diagnostic mode using either of the 3 methods below.

(a) Method 1:

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

(2) While pressing and holding the "MENU" switch, operate the light control switch: Off → Tail → Off → Tail → Off → Tail → Off.

*a	"MENU" Switch

(3) Diagnostic mode starts and the "Service Menu" screen will be displayed. Service inspection starts automatically and the result will be displayed.

(b) Method 2:

NOTICE:

If the operation fails and diagnostic mode cannot be entered, turn the multi-display assembly screen display on and off once, and then perform the procedures listed below from the first step again. (Only turning the radio receiver assembly power supply on and off will not work.)
Do not touch the touch screen except when required.
Since the remote touch screen may recognize a pinch in/out or flick operation if operated with 2 fingers, always use 1 finger to operate the remote touch in diagnostic mode.

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

(2) Turn the multi-display assembly screen display off.

(3) Turn the radio receiver assembly power supply off.

(4) Perform the "left to right flick" operation on the touch pad 5 times as shown in the illustration.

(5) Perform the "right to left flick" operation on the touch pad 5 times as shown in the illustration.

HINT:

Complete the operation within 15 seconds of the first "left to right flick" operation.
Perform a flick operation at the center of the remote touch screen.

(6) Diagnostic mode starts and the "Service Menu" screen will be displayed. Service inspection starts automatically and the result will be displayed.

(1) Connect the Techstream to the DLC3.

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

(3) Turn the Techstream on.

(4) Enter the following menus: Body Electrical / Navigation System / Utility / Map Information.

Body Electrical > Navigation System > Utility

Tester Display
Diagnostic Mode

(5) Diagnostic mode starts and the "Service Menu" screen will be displayed. Service inspection starts automatically and the result will be displayed.

(d) Method 4:

NOTICE:

If the operation fails and diagnostic mode cannot be entered, turn the multi-display assembly screen display on and off once, and then perform the procedures listed below from the first step again. (Only turning the radio receiver assembly power supply on and off will not work.)

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

(2) Turn the multi-display assembly screen display off.

(3) Turn the radio receiver assembly power supply off.

(4) Press the ">" switch 5 times, and then press the "<" switch 5 times within 15 seconds.

(5) Diagnostic mode starts and the "Service Menu" screen will be displayed. Service inspection starts automatically and the result will be displayed.

FAILURE DIAGNOSIS

(a) The "Failure Diagnosis" screen will be displayed by pressing the "Failure Diagnosis" switch on the "Service Menu" screen.

SYSTEM CHECK

(a) The "System Check Mode" screen will be displayed by selecting "System Check" on the "Failure Diagnosis" screen.

CHECK DTC (CHECK USING SYSTEM CHECK MODE SCREEN)

(a) System check mode screen description

Screen Description

Display	Content
*a: Device Name List No. 1	Device Name List No. 1 displays some of the devices that make up the audio and visual system. The names of the components from Device Name List No. 1 are shown in the following table.
*b: Check Result	Result codes for all devices are displayed.
*c: Memory Clear	Present and history DTCs and registered connected device names are cleared. Select "Memory CLR" for 3 seconds.
*d: Recheck	A system check will be performed again after the memory is cleared. "Recheck" will dim during a system check.
*e: Device Name List No. 2	Device Name List No. 2 displays some of the devices that make up the audio and visual system. The names of the components from Device Name List No. 2 are shown in the following table.

*a: Device Name List No. 1 Description

Name	Component	Connection Method
DCU	Radio Receiver Assembly	-
DISP	Multi-display assembly	Communication line for AVC-LAN
R-TOUCH	Remote operation controller assembly (remote touch)	Local bus communication line
CLOCK	Clock assembly	Local bus communication line
CAA	Television camera assembly	Vehicle wire harness
DSP-AMP	Stereo component amplifier assembly	Communication line for AVC-LAN

*b: Check Result Description

Result	Meaning	Action
OK	The device does not respond with a DTC.	-
NCON	The device was previously present, but does not respond in diagnostic mode.	- Check power supply wire harness of the device. - Check the AVC-LAN communication line of the device.
NRES	The device responds in diagnostic mode, but gives no DTC information.	- Check power supply wire harness of the device. - Check the AVC-LAN communication line of the device.

Result

Meaning

Action

The device does not respond with a DTC.

NCON

The device was previously present, but does not respond in diagnostic mode.

- Check power supply wire harness of the device.

- Check the AVC-LAN communication line of the device.

NRES

The device responds in diagnostic mode, but gives no DTC information.

- Check power supply wire harness of the device.

- Check the AVC-LAN communication line of the device.

*e: Device Name List No. 2 Description

Name	Component	Connection Method
*: w/ Manual (SOS) Switch
DCM*	DCM (telematics transceiver)	Communication line for USB
AUX/VTR	No. 1 stereo jack adapter assembly	Vehicle wire harness
IF-BOX_ USB	No. 1 stereo jack adapter assembly	Communication line for USB

(b) Unit check mode screen description

Screen Description

Display	Content
*a: Device name	Target device
*b: History DTC	Diagnostic memory results and stored DTCs are displayed.
*c: Present DTC	DTCs output in the service check are displayed.
*d: DTC	DTC (Diagnostic Trouble Code)
*e: Timestamp	The time and date of history DTCs are displayed. (The year is displayed in 2-digit format.)
*f: Diagnosis clear switch	Selecting "Code CLR" for 3 seconds clears the diagnostic memory data of the target device. (Both diagnostic system check result and the displayed data are cleared.)

HINT:

This screen is updated once per second.
A maximum of 6 DTCs can be displayed for history and present DTCs.

(1) If the check result is "DETAIL", select the displayed check result to view the results on the "Unit Check Mode" screen and record them.

NOTICE:

A maximum of 6 DTCs can be displayed for history and present DTCs on the "Unit Check Mode" screen. Therefore, when 6 DTCs are displayed, troubleshoot those DTCs first and then check the "Unit Check Mode" screen again to see if any other DTCs are displayed.

HINT:

When all results are "OK", no DTCs are stored.
When "NCON" is displayed for all devices connected via the AVC-LAN, or when all device names are not displayed, check if there is a short circuit in the AVC-LAN or devices connected to the AVC-LAN. Repair or replace parts as necessary.
Click here
When proceeding to view the results of another device, select the "Back" switch to return to the "System Check Mode" screen. Repeat the above step to view the results of other devices.

(2) Check the details of the DTC(s).

Click here

NOTICE:

The audio and visual system outputs DTCs for the following system. When DTCs other than those in Diagnostic Trouble Code Chart for the audio and visual system are output, refer to Diagnostic Trouble Code Chart for the relevant system.

System	Proceed to
*: w/ Manual (SOS) Switch
Parking Assist Monitor System
Safety Connect System*
Lexus Enform System*

DTC CLEAR/RECHECK (CLEAR USING SYSTEM CHECK MODE SCREEN)

(a) Clear DTCs

(1) Select "Memory CLR" for 3 seconds.

(2) Confirm that the check results are cleared.

HINT:

To clear the DTCs for a specific device, clear the DTCs using the "Unit Check Mode" screen.
When clearing DTCs using the "Unit Check Mode" screen, select "Code CLR" for 3 seconds.

(b) Recheck

(1) Press the "Recheck" switch.

(2) Confirm that all diagnostic codes are "OK" when the check results are displayed. If a result other than "OK" is displayed, perform troubleshooting again.

HINT:

When the DTCs are cleared using the "Unit Check Mode" screen, select "Back" to return to the "System Check Mode" screen and perform this operation.

FINISH DIAGNOSTIC MODE

(a) Turn the power switch off.

SEE MORE:

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

Control Module Communication Bus Off (U0073,U0100,U0126,U0129,U0140,U0163,U0233,U0265-U0268,U1110)

DESCRIPTION These DTCs are stored if there is a malfunction in the CAN communication system connected to the parking assist ECU. HINT: If CAN communication system DTCs are stored, they may also be stored in other systems. DTC No. Detection Item DTC Detection Condition Trouble Area U0073

Lexus NX: Dtc Check / Clear

READ NEXT:

Freeze Frame Data

Data List / Active Test

Diagnostic Trouble Code Chart

SEE MORE:

Parking brake

Control Module Communication Bus Off (U0073,U0100,U0126,U0129,U0140,U0163,U0233,U0265-U0268,U1110)