Toyota Camry (XV70): 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 (for Driver Door) |
- | - |
|
Power Window Regulator Motor Assembly (for Front Passenger Door) |
- | - |
|
Power Window Regulator Motor Assembly (for Rear Door LH) |
- | - |
|
Power Window Regulator Motor Assembly (for Rear Door RH) |
- | - |
|
Multiplex Network Master Switch Assembly |
- | - |
|
Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly)*1 |
- | - |
|
Sliding Roof ECU (Sliding Roof Drive Gear Assembly)*2 |
- | - |
|
Roof Sunshade ECU (Sliding Roof Drive Gear Assembly)*2 |
- | - |
- *1: w/ Sliding Roof System
- *2: w/ Panoramic Moon Roof System
|
Component | Master Control |
LIN Communication DTC Output Function |
|---|---|---|
|
Certification ECU (Smart Key ECU Assembly) |
○ | ○ |
|
ID Code Box (Immobiliser Code ECU) |
- | - |
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the LIN communication system.
*: Use the Techstream.
PROCEDURE
1. VEHICLE BROUGHT TO WORKSHOP
Terminals Of Ecu
TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
(a) Disconnect the MB main body ECU (multiplex network body ECU) connector.
Click he
SEE MORE:
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
Lack of Power
DESCRIPTION
Problem Symptom Suspected Area
Trouble Area
Engine speed fluctuation due to abnormal combustion
Idle speed too low or high
Strong engine vibration due to above symptoms
Ignition malfunction
Deviation in air fuel ratio (Excessive or i
