Lexus NX: System Description
SYSTEM DESCRIPTION
LIN COMMUNICATION SYSTEM DESCRIPTION
The LIN communication system is used for communication between the components in the tables below. If communication cannot be performed through LIN communication because of a break in the communication lines or some other reason, the master control ECU of the relevant system stores DTCs. Refer to the table below about the communication bus lines and connected components.
HINT:
- Each component has a fail-safe function which activates to maintain the minimum performance of the system and protect the system.
- In the following table, "○" indicates that the function applies, and "-" indicates that it does not.
| Component | Master Control | LIN Communication DTC Output Function |
|---|---|---|
| Main body ECU (multiplex network body ECU) | ○ | ○ |
| Front power window regulator motor assembly LH | - | - |
| Front power window regulator motor assembly RH | - | - |
| Rear power window regulator motor assembly LH | - | - |
| Rear power window regulator motor assembly RH | - | - |
| Sliding roof drive gear sub-assembly*1 | - | - |
| Kick door control sensor*2 | - | - |
- *1: w/ Sliding Roof System
- *2: w/ Hands Free Power Back Door
| Component | Master Control | LIN Communication DTC Output Function |
|---|---|---|
| Certification ECU (smart key ECU assembly) | ○ | ○ |
| Steering lock actuator assembly | - | - |
| ID code box (immobiliser code ECU) | - | - |
| Component | Master Control | LIN Communication DTC Output Function |
|---|---|---|
| Air conditioning amplifier assembly | ○ | ○ |
| Air conditioning control assembly | - | - |
| Component | Master Control | LIN Communication DTC Output Function |
|---|---|---|
| Windshield wiper relay | ○ | ○ |
| Rain sensor | - | - |
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use these procedures to troubleshoot the LIN communication system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of the problem symptom. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order
Terminals Of Ecu
TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (multiplex network body ECU). Click here *1 Main Bo
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Components
COMPONENTS ILLUSTRATION *1 FRONT DOOR LOWER OUTSIDE MOULDING SUB-ASSEMBLY LH *2 HOLE COVER ILLUSTRATION *1 FRONT DOOR UPPER OUTSIDE MOULDING PAD - - ● Non-reusable part - -
Terminals Of Ecu
TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *1 Main Body ECU (Multiplex Network Body ECU) - - (a) Measure the voltage and check for pulses according to the value(s) in the table below. Terminal No. (Symbol) Wiring C
