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Can Communication System: Precaution

WARNING: This page is about a different car, the 2007 Lexus ES 350. 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) which includes components 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 AIRBAG SYSTEM ).
  3. BUS WIRE REPAIR 
    1. After repairing the bus wire with solder, wrap the repaired part with electrical tape.
      NOTE:
      • The CANL bus wire and CANH bus wire must be installed together all the times.
      • When installing, make sure to twist them.
      • CAN bus wires are likely to be influenced by electrical noise if they are not twisted.
      • The difference in length between the CANL bus wire and CANH bus wire should be 100 mm (3.937 in.) or less.
        Fig 1: Identifying Repaired Part Of Wire
        G04835666Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Leave approximately 80 mm (3.150 in.) loose in the twisted wires around the connector.
    2. Do not use bypass wiring between the connectors.
      NOTE: The ability of the twisted bus wires to resist interference will be lost if bypass wiring is used.
      Fig 2: Identifying Bypass Wiring
      G05254823Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CONNECTOR HANDLING 
    1. When checking resistance with a tester, insert the tester probes from the backside (harness side) of the connector.
      Fig 3: Inserting Tester Probes From Backside (Harness Side) Of Connector
      G04982202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Use a service wire to check the connector if it is impossible to check continuity from the rear of the connector.
      Fig 4: Checking Continuity From Rear Of Connector
      G05254825Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. PRECAUTION FOR DISCONNECTING THE BATTERY CABLE 
    NOTE: Some systems need to be initialized after reconnecting the negative (-) battery terminal (See INITIALIZATION ).
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