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Section 923 (Can Communication System - Diagnostics): Precaution

WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. HANDLING PRECAUTIONS ON STEERING SYSTEM 
    1. Care must be taken when replacing parts. Incorrect replacement could affect the performance of the steering system and result in hazardous driving.
  2. HANDLING PRECAUTIONS ON SRS AIRBAG SYSTEM 
    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 the SRS airbag to unexpectedly deploy during servicing, possibly leading 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 .
  3. WIRE HARNESS REPAIR 
    1. After repairing the wire bus line with a solder, wrap the repaired part with vinyl tape.
      NOTE:
      • The CANL bus line and CANH bus line must be installed together all the time.
        1. When installing, make sure to twist them.
      • The difference in length of the CANL bus line and CANH bus line should be within 100 mm (3.93 in.).
      • Untwisted parts around the connector should be within 80 mm (3.15 in.).
      Fig 1: Identifying Twisted Wire Harness
      G02579794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Do not use a bypass wire between the connectors.
      NOTE: If you use a bypass wire, the characteristic of the twisted wire harness will be lost.
      Fig 2: Precautions For Bypass Wire Between Connectors
      G02579795Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CONNECTOR HANDLING 
    1. When inserting tester probes into a connector, insert them from the back of the connector.
      Fig 3: Inserting Tester Probes Into Connector
      G02579796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. If it is impossible to check resistance from the back of the connector, use a repair wire to check it.
      Fig 4: Checking Resistance From Back Of Connector Using Repair Wire
      G02579797Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002