Toyota Corolla Cross: 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) |
○ |
○ |
|
Front Power Window Regulator Motor Assembly (Driver Door) |
- |
- |
|
Front Power Window Regulator Motor Assembly (Front Passenger Door) |
- |
- |
|
Front Power Window Regulator Motor Assembly (Rear RH Door) |
- |
- |
|
Front Power Window Regulator Motor Assembly (Rear LH Door) |
- |
- |
|
Multiplex Network Master Switch Assembly |
- |
- |
|
Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly)*1 |
- |
- |
- *1: w/ Sliding Roof System
|
Component |
Master Control |
LIN Communication DTC Output Function |
|---|---|---|
|
Certification ECU (Smart Key ECU Assembly) |
○ |
○ |
|
ID Code Box (Immobiliser Code ECU) |
- |
- |
READ NEXT:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the LIN communication system.
*: Use the GTS.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
Terminals Of Ecu
TERMINALS OF ECU
CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY
ECU)
*1
Power Distribution Box Assembly
*2
Main Body
Diagnosis System
DIAGNOSIS SYSTEM
DESCRIPTION
The main body ECU (multiplex network body ECU) and certification ECU (smart key
ECU assembly) control the LIN communication system. LIN communication system data
and
SEE MORE:
Inspection
INSPECTION PROCEDURE 1. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH
(a) Check the resistance.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection Condition
Specified Condition
O30-1 - Switch body
Front Floor Electrical Key Oscillator Circuit Open (B27A513)
DESCRIPTION The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the No. 1 indoor electrical key antenna assembly (front floor). For the No. 1 indoor electrical key antenna assembly (front floor) to detect when the electrical key transmitter sub-assem
