Lexus NX: System Diagram
SYSTEM DIAGRAM
CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
| Component | Function |
|---|---|
| Front door outside handle assembly | Receives request signals from the certification ECU (smart key ECU assembly) via the built-in electrical key antenna (front door) and forms the vehicle exterior detection area. Uses the built-in touch sensor (lock sensor/unlock sensor) to detect the operation of the front door outside handle assembly and sends signals to the certification ECU (smart key ECU assembly). |
| Rear door outside handle assembly | Receives request signals from the certification ECU (smart key ECU assembly) via the built-in electrical key antenna (rear door) and forms the vehicle exterior detection area. Uses the built-in touch sensor (lock sensor/unlock sensor) to detect the operation of the rear door outside handle assembly and sends signals to the certification ECU (smart key ECU assembly). |
| No. 1 indoor electrical key antenna assembly (front floor) No. 2 indoor electrical key antenna assembly (rear floor) No. 3 indoor electrical key antenna assembly (inside luggage) | Receives the request code from the certification ECU (smart key ECU assembly) and forms the vehicle interior detection area. |
| Electrical key antenna (outside luggage compartment) | Receives the request code from the certification ECU (smart key ECU assembly) and forms the back door exterior detection area. |
| Back door opener switch assembly | Sends switch operation signals to the certification ECU (smart key ECU assembly). |
| Door control receiver | Receives the smart access system with push-button start code/wireless code sent from the electrical key transmitter sub-assembly and sends it to the certification ECU (smart key ECU assembly). |
| Wireless door lock buzzer | Sounds when warning functions operate in accordance with certification ECU (smart key ECU assembly) control. |
| Electrical key transmitter sub-assembly | Sends the ID code upon receiving a request signal. |
| Certification ECU (smart key ECU assembly) | Sends request codes to each electrical key antenna. Distinguishes and verifies the ID code from the electrical key transmitter sub-assembly and sends signals to each ECU in response to operated functions (controls entire system). Performs encryption code communication with the ID code box (immobiliser code ECU) when ignition operations are performed. |
Wireless Door Lock Control System
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Power Back Door System (w/ Power Back Door System)
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System Description
SYSTEM DESCRIPTION MULTI CHANNEL FUNCTION (a) The electrical key transmitter sub-assembly and door control receiver can operate on two different RF channels. When an electrical key transmitter sub-ass
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use these procedures to troubleshoot the smart access system with push-button start (for Entry Function).
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGH
Customize Parameters
CUSTOMIZE PARAMETERS CUSTOMIZE SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) HINT: The following items can be customized. NOTICE:
When the customer requests a change in a function
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Components
COMPONENTS ILLUSTRATION *1 DECK FLOOR BOX LH *2 NO. 3 DECK BOARD SUB-ASSEMBLY *3 REAR DECK FLOOR BOX *4 NEGATIVE AUXILIARY BATTERY TERMINAL N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION *1 FUEL PUMP CONTROL ECU ASSEMBLY *2 PARKING BRAKE ECU ASSE
Ambient Temperature Sensor Circuit (B1412)
DESCRIPTION The thermistor assembly (ambient temperature sensor) is installed in front of the cooler condenser assembly to detect the ambient temperature which is used to control the air conditioning system AUTO mode. This sensor is connected to the air conditioning amplifier assembly and detects fl
