Lexus NX: Terminals Of Ecu
TERMINALS OF ECU
HEADUP DISPLAY (METER MIRROR SUB-ASSEMBLY)
(a) Measure the voltage and resistance according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| J5-1 (IG) - Body ground | B - Body ground | Power switch signal | Power switch off | Below 1 V |
| Power switch on (IG) | 11 to 14 V | |||
| J5-2 (B) - Body ground | G - Body ground | Auxiliary battery | Power switch off | 11 to 14 V |
| J5-4 (ES) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| J5-9 (SW1) - Body ground | R - Body ground | Headup display switch signal | Power switch on (IG), headup display switch (HUD) off | 4.7 to 5.5 V |
| Power switch on (IG), headup display switch (HUD) on | 0 to 0.6 V | |||
| Power switch on (IG), headup display switch (DISP) off | 4.7 to 5.5 V | |||
| Power switch on (IG), headup display switch (DISP) on | 0.8 to 1.6 V | |||
| J5-10 (SW2) - Body ground | L - Body ground | Headup display switch signal | Power switch on (IG), headup display switch (contrast up) off | 4.7 to 5.5 V |
| Power switch on (IG), headup display switch (contrast up) on | 0.8 to 1.6 V | |||
| Power switch on (IG), headup display switch (contrast down) off | 4.7 to 5.5 V | |||
| Power switch on (IG), headup display switch (contrast down) on | 0 to 0.6 V | |||
| Power switch on (IG), headup display switch (position up) off | 4.7 to 5.5 V | |||
| Power switch on (IG), headup display switch (position up) on | 3.1 to 4.1 V | |||
| Power switch on (IG), headup display switch (position down) off | 4.7 to 5.5 V | |||
| Power switch on (IG), headup display switch (position down) on | 1.8 to 2.7 V | |||
| J5-12 (MPX1) - Body ground | Y - Body ground | Radio receiver assembly communication signal | Power switch on (IG) | Pulse generation |
| J5-13 (MPX2) - Body ground | W - Body ground | Radio receiver assembly communication signal | Power switch on (IG) | Pulse generation |
| J5-14(CS) | B | Local bus communication line | - | - |
| J5-15(TX-) | W | Local bus communication line | - | - |
| J5-16 (E) - Body ground | B - Body ground | Ground (Illumination ground) | Always | Below 1 Ω |
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 / Head Up Display / Tr
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a pa
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Headup Display System DTC No. Detection Item Memory Link U0100 Lost Communication with ECM / PCM "A" DTC stored U0142 Lost Communication With
SEE MORE:
Removal
REMOVAL PROCEDURE 1. REMOVE REAR SEAT ASSEMBLY (for Manual Seat) Click here 2. REMOVE REAR SEAT ASSEMBLY (for Power Seat) Click here 3. REMOVE REAR SEAT INNER WITH CENTER BELT ASSEMBLY RH (a) for Manual Seat: (1) w/o Seat Heater System:
Using a clip remover, detach the 2 wire harness clamp
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored. HINT:
