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Home >> Toyota >> 2017 >> Corolla SE, Standard Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - (W/O Central Gateway Ecu) - Diagnostics - Introduction (1 Of 2) (Model Code: ZRE172) >> CAN COMMUNICATION SYSTEM (W/O Central Gateway ECU) >> Precaution [08/2013 - ] >> Precaution [08/2013 - ]
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Precaution [08/2013 - ]

  1. NOTICE FOR INITIALIZATION 
    NOTE:

    When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.

    System See Procedure
    Air Conditioning System (for Automatic Air Conditioning System) Refer to INITIALIZATION [08/2013 - 08/2015] Refer to INITIALIZATION [08/2015 - 08/2016] Refer to INITIALIZATION [08/2016 - 08/2017] Refer to INITIALIZATION [08/2017 - ]
  2. IGNITION SWITCH EXPRESSIONS 
    1. The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section.
      Expression Ignition Switch (Position) Engine Switch (Condition)
      Ignition Switch off LOCK Off (Lock)
      Ignition Switch ACC ACC On (ACC)
      Ignition Switch ON ON On (IG)
      Engine Start START On (Start)
  3. CAN COMMUNICATION SYSTEM TROUBLESHOOTING 
    1. Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

      Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] 

  4. PRECAUTION FOR STEERING SYSTEM HANDLING 
    1. Be careful when replacing parts. Incorrect replacement could affect the performance of the steering system and result in hazardous driving.
  5. PRECAUTION FOR SRS AIRBAG SYSTEM HANDLING 
    1. This vehicle is equipped with a Supplemental Restraint System (SRS) which includes parts such as airbags for the driver and front passenger. Failure to carry out service operations in the correct sequence could cause unexpected SRS deployment during servicing and may cause a serious accident. Before servicing (including removal or installation of parts, inspection or replacement), be sure to read Precaution for SRS.

      Refer to PRECAUTION [08/2013 - 04/2014] Refer to PRECAUTION [04/2014 - 08/2016] Refer to PRECAUTION [08/2016 - 08/2017] Refer to PRECAUTION [08/2017 - ]

  6. BUS LINE REPAIR 
    1. After repairing a bus line with solder, wrap the repaired part with electrical tape.
      Fig 1: Bus Line Repair
      GTY454391Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • The CANL bus line and CANH bus line must be installed together at all times.
      • When installing, make sure that these lines are twisted, because CAN bus lines are likely to be influenced by electrical noise if the bus lines are not twisted.
      • Leave approximately 80 mm (3.15 in.) loose in the twisted wires around the connector.
      • When repairing the CAN bus lines, do not change the length of the lines. (Make sure that the length of the CANH bus line and CANL bus line are the same.)
    2. Do not use bypass wiring between connectors.
      Fig 2: Do Not Use Bypass Wiring
      GTY444494Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Bypass Wire
      NOTE:
      • The ability of the twisted bus lines to resist interference will be lost if bypass wiring is used.
      • Do not use a twisted pair of wires for bypass wiring.
  7. CONNECTOR HANDLING 
    1. When checking resistance with a tester, insert the tester probes from the backside (harness side) of the connector.
      Fig 3: View Of Tester Probes
      GTY451706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Tester Probe
    2. Use service wires to check the connector if it is impossible to check continuity from the rear of the connector.
      Fig 4: Using Service Wires To Check Connector
      GTY441801Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Service Wire