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Precaution [08/2016 - ]

WARNING: This page is about a different car, the 2018 Toyota Corolla, 2017 Toyota Corolla, 2016 Toyota Corolla, 2015 Toyota Corolla, and 2014 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
  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
    Lane Departure Alert System (w/ Steering Control) Refer to INITIALIZATION [08/2016 - 08/2017] or INITIALIZATION [08/2017 - ]
    Pre-collision System
    Air Conditioning System (for Automatic Air Conditioning System)
  2. IGNITION SWITCH EXPRESSIONS 
    1. The type of ignition switch used on this model differs according to the specifications of the vehicle.
      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 [08/2016 - ] 

  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 [08/2016 - 08/2017] or PRECAUTION [08/2017 - ]

  6. BUS LINE REPAIR 
    1. After repairing a bus line with solder, wrap the repaired part with electrical tape.
      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.
      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.
      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.
      GTY441801Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Service Wire
  8. PRECAUTION FOR WHEN REPLACING A GATEWAY FUNCTION EQUIPPED ECU (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) WITH A USED ONE FROM ANOTHER VEHICLE 
    1. When a gateway function equipped ECU (central gateway ECU (network gateway ECU)) that was previously installed on another vehicle is used as a replacement part, it is necessary to initialize the connection information stored in the ECU.
      NOTE:

      If the connection information stored in a gateway function equipped ECU that was previously installed on another vehicle is different from the actual ECUs and sensors connected to the corresponding bus, communication DTCs will be detected.

    2. Initialize the connection information of a gateway function equipped ECU (central gateway ECU (network gateway ECU)).
    3. Connect the Techstream to the DLC3.
    4. Turn the ignition switch to ON.
    5. Turn the Techstream on.
    6. Enter the following menus: Body Electrical / Central Gateway / Utility.
    7. Select Initialization from Utility to initialize the ECU.

      Body Electrical > Central Gateway > Utility 

      Tester Display
      Initialization
  9. PRECAUTIONS FOR WHEN GATEWAY FUNCTION EQUIPPED ECU (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) DETECTS COMMUNICATION DTCS FOR ECUS NOT CONNECTED TO THE ECU 
    1. Refer to Precautions When Replacing a Gateway Function Equipped ECU (Central Gateway ECU (Network Gateway ECU)) with a Used One from Another Vehicle and initialize the connection information of the ECU.
    2. Clear the DTCs and check that no DTCs are output.
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