Lexus NX: Main Switch Circuit
DESCRIPTION
The headup display switch assembly and meter mirror sub-assembly are connected via direct line. The meter mirror sub-assembly can be turned off and on by operating the headup display switchassembly.
WIRING DIAGRAM
PROCEDURE
| 1. | READ VALUE USING TECHSTREAM (MAIN SWITCH) |
(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 / Head Up Display / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Head Up Display > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Main Switch | Main switch | OFF or ON | OFF: Switch released ON: Switch pushed | - |
| Brightness Up Switch | Brightness up switch | OFF or ON | OFF: Switch released ON: Switch pushed | - |
| Brightness Down Switch | Brightness down switch | OFF or ON | OFF: Switch released ON: Switch pushed | - |
| Projection Position Up Switch | Projection position up switch | OFF or ON | OFF: Switch released ON: Switch pushed | - |
| Projection Position Down Switch | Projection position down switch | OFF or ON | OFF: Switch released ON: Switch pushed | - |
| Display Change Switch | Display change switch | OFF or ON | OFF: Switch released ON: Switch pushed | - |
OK:
Headup display switch assembly condition displayed on the Techstream changes with the actual switch operation.
Body Electrical > Head Up Display > Data List| Tester Display |
|---|
| Main Switch |
| Brightness Up Switch |
| Brightness Down Switch |
| Projection Position Up Switch |
| Projection Position Down Switch |
| Display Change Switch |
| OK | .gif) | REPLACE METER MIRROR SUB-ASSEMBLY |
|
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| 2. | INSPECT HEADUP DISPLAY SWITCH ASSEMBLY |
(a) Remove the headup display switch assembly.
Click here .gif)
(b) Inspect the headup display switch assembly.
Click here
| NG | | REPLACE HEADUP DISPLAY SWITCH ASSEMBLY |
|
| 3. | CHECK HARNESS AND CONNECTOR (METER MIRROR SUB-ASSEMBLY - HEADUP DISPLAY SWITCH ASSEMBLY) |
(a) Disconnect the J5 meter mirror sub-assembly connector.
(b) Disconnect the I70 headup display switch assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J5-9(SW1) - I70-12(ILU) | Always | Below 1 Ω |
| J5-10(SW2) - I70-10(ILD) | Always | Below 1 Ω |
| J5-16(E) - I70-6(CH) | Always | Below 1 Ω |
| J5-9(SW1) or I70-12(ILU) - Body ground | Always | 10 kΩ or higher |
| J5-10(SW2) or I70-10(ILD) - Body ground | Always | 10 kΩ or higher |
| J5-16(E) or I70-6(CH) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE METER MIRROR SUB-ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Components
COMPONENTS ILLUSTRATION *1 INSTRUMENT SIDE PANEL LH *2 NO. 1 INSTRUMENT PANEL SAFETY PAD SUB-ASSEMBLY *3 TRIP SWITCH (LIGHT CONTROL RHEOSTAT) - -
Removal
REMOVAL PROCEDURE 1. REMOVE INSTRUMENT SIDE PANEL LH Click here 2. REMOVE NO. 1 INSTRUMENT PANEL SAFETY PAD SUB-ASSEMBLY Click here 3. REMOVE TRIP SWITCH (LIGHT CONTROL RHEOSTAT) (a) Using
SEE MORE:
Hybrid System Indicator Malfunction
DESCRIPTION A hybrid system indicator has been used on this vehicle. In this circuit, the combination meter assembly receives the eco-zone indicator level signal from the hybrid vehicle control ECU via CAN communication. The combination meter assembly controls the operation of the hybrid system indi
Driving assist systems
To keep driving safety and performance,
the following systems operate
automatically in response to
various driving situations. Be aware,
however, that these systems are
supplementary and should not be
relied upon too heavily when operating
the vehicle.
Summary of the driving assist
systems
