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
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 Diagn
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Installation
INSTALLATION PROCEDURE 1. INSTALL TIMING CHAIN COVER ASSEMBLY
(a) Clean the contact surfaces of the engine assembly, and confirm that no oil, moisture, or other foreign matter is on the surfaces.
*a Engine Assembly Side
*b Timing Chain Cover Assembly Side
Clean
Inspection
INSPECTION PROCEDURE 1. INSPECT NO. 1 VACUUM SWITCHING VALVE ASSEMBLY (for ACIS)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection Condition
Specified Condition
1 - 2 20°C (68°F)
33 to 39 Ω
