Lexus ES: 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 such as when there is an open or short in a communication line, the master control ECU of the relevant system will store a DTC. Refer to the table below about the communication bus lines and connected components.
HINT:
- Each component has a fail-safe function which operates in the event of a malfunction to protect the system and allow communication between other components to continue.
- 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) | ○ | ○ |
| Power Window Regulator Motor Assembly (Driver Door) | - | - |
| Power Window Regulator Motor Assembly (Front Passenger Door) | - | - |
| Power Window Regulator Motor Assembly (Rear LH Door) | - | - |
| Power Window Regulator Motor Assembly (Rear RH Door) | - | - |
| Multiplex Network Master Switch Assembly | - | - |
| Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly) | - | - |
| Kick Door Control Sensor* | - | - |
- *: w/ Power Trunk Lid System
| Component | Master Control | LIN Communication DTC Output Function |
|---|---|---|
| Certification ECU (Smart Key ECU Assembly) | ○ | ○ |
| Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly) | - | - |
| ID Code Box (Immobiliser Code ECU) | - | - |
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System Diagram
SYSTEM DIAGRAM DOOR BUS LINES CERTIFICATION BUS LINES
Parts Location
PARTS LOCATION ILLUSTRATION *A for Manual Tilt and Manual Telescopic Steering Column *B for Power Tilt and Power Telescopic Steering Column *C w/ Power Trunk Lid System - - *1
Precaution
PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTICE: When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following s
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Open in One Side of Bus 1 Branch Line
DESCRIPTION When the CAN bus main lines are normal (no open, short to ground, short to +B or short between lines) and there is an ECU or sensor on the "Communication Bus Check" screen that is indicated as not communicating or whose connection status on the "Communication Bus Check" screen changes in
Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during cylinder head gasket removal/installation are shown below. Necessary Procedure After Parts Removed/Inst
