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Can Communication System: Precaution

WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. STEERING SYSTEM HANDLING PRECAUTIONS 
    1. Care must be taken when replacing parts. Incorrect replacement could affect the performance of the steering system and result in hazardous driving.
  2. SRS AIRBAG SYSTEM HANDLING PRECAUTIONS 
    1. This vehicle is equipped with an SRS (Supplemental Restraint System) such as the driver airbag and front passenger airbag. Failure to carry out service operations in the correct sequence could cause unexpected SRS deployment during servicing and may lead to a serious accident. Before servicing (including removal or installation of parts, inspection or replacement), be sure to read the precautionary notice for the Supplemental Restraint System (See PRECAUTION ).
  3. BUS LINE REPAIR 
    Fig 1: Identifying Bus Line Repair Area
    G04022420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. After repairing the bus line with solder, wrap the repaired part with vinyl tape (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
      NOTE:
      • The CANL bus line and CANH bus line must be installed together, all the time.
      • When installing, make sure to twist them.
      • CAN bus lines are likely to be influenced by noise if the bus lines are not twisted.
      • The difference in length of the CANL bus line and CANH bus line should be within 100 mm (3.937 in.).
      • Leave approximately 80 mm (3.150 in.) loose in the twist around the connector.
    2. Do not use bypass wiring between the connectors.
      NOTE: The feature of the twisted wire harness will be lost if you use bypass wiring.
      Fig 2: Identifying Bypass Wire
      G04022421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CONNECTOR HANDLING 
    1. When inserting tester probes into a connector, insert them from the rear of the connector.
      Fig 3: Inserting Tester Probes Into Connector
      G04022422Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Use a repair wire to check the connector if it is impossible to check continuity from the rear of the connector.
  5. PRECAUTION FOR DISCONNECTING THE BATTERY CABLE 
    Fig 4: Identifying Continuity From Rear Of Connector
    G04022423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • When disconnecting the negative (-) battery terminal, initialize the following system after the terminal is reconnected.
    SYSTEM NAME CHART

    System Name See procedure
    Clearance Sonar System INITIALIZATION
    Power Window Control System INITIALIZATION
    Sliding Roof System INITIALIZATION
    Variable Gear Ratio Steering System INITIALIZATION
    • Perform the RESET MEMORY (AT initialization) operation after replacing the automatic transmission assembly, engine assembly or ECM.

      HINT:

      RESET MEMORY cannot be completed by only disconnection of the battery terminal.

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