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:
Sleep Operation Failure of Occupant Classification ECU (B1796)
DESCRIPTION During sleep mode, the occupant detection ECU monitors the condition of each sensor while the power switch is off. In this mode, if the occupant detection ECU detects an internal malfunction, DTC B1796 is stored. DTC No. Detection Item DTC Detection Condition Trouble Area B1
Precaution
PRECAUTION POINTS TO NOTE WHEN SERVICING (a) Pay attention to the following points when servicing. (1) When "!" mark is displayed on the multi-display assembly after disconnecting the cable from the negative (-) auxiliary battery terminal, correct the steering angle neutral point. Click here (2) D
