Lexus NX: Terminals Of Ecu

TERMINALS OF ECU

CHECK FORWARD RECOGNITION CAMERA

NOTICE:

  • DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed.
  • Do not apply larger loads than necessary since the connector may be damaged.

(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

T18-7 (IGB) - Body ground

LA-P - Body ground

Power source

Power switch on (IG)

11 to 14 V

Power switch off

Below 1 V

T18-1 (HTR) - Body ground

B - Body ground

Forward recognition with heater hood sub-assembly operation signal

Power switch on (IG), forward recognition with heater hood sub-assembly not operating

11 to 14 V

Power switch on (IG), forward recognition with heater hood sub-assembly operating

Below 1 V

T18-10 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

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 Diagnosis System

DIAGNOSIS SYSTEM DIAGNOSIS FUNCTION (a) The front camera system does not have a notification function such as a warning light when a DTC is detected. When a malfunction occurs, it stores a DTC and sen

 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: Chassis / Front Recognition Camera / T

 Freeze Frame Data

FREEZE FRAME DATA DESCRIPTION (a) When a front camera system DTC is stored, the forward recognition camera stores the current vehicle (ECU or sensor) state as Freeze Frame Data. CHECK FREEZE FRAME DAT

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 Motor High-voltage Circuit

DESCRIPTION The cause of the malfunction may be the high-voltage circuit of the motor. Check the motor internal resistance and the connection condition of the high-voltage line between the inverter and motor to check whether there is an open or short circuit. Related Parts Check Area Inspection

 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 / Telematics / Trouble Codes. Body Electrical > Telematics > Trouble Codes (e) Check for DTCs. Click here CLEAR DT

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