Can Communication System: Precaution

WARNING: This page is about a different car, the 2009 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

IGNITION SWITCH EXPRESSIONS

HINT:

The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section.

IGNITION SWITCH POSITION

Expression	Ignition Switch (Position)	Engine Switch (Condition)
Ignition Switch off	LOCK	Off
Ignition Switch ON	ON	On (IG)
Ignition Switch ACC	ACC	On (ACC)
Engine Start	START	Start

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable after the SRS system.
1. Be careful when replacing parts. Incorrect replacement could affect the performance of the steering system and result in hazardous driving.
STEERING SYSTEM HANDLING PRECAUTIONS
1. Be careful when replacing parts. Incorrect replacement could affect the performance of the steering system and result in hazardous driving.
SRS AIRBAG SYSTEM HANDLING PRECAUTIONS
1. This vehicle is equipped with an SRS (Supplemental Restraint System) which includes parts 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 SRS (See AIRBAG SYSTEM ).
BUS WIRE REPAIR
1. After repairing a bus wire with solder, wrap the repaired part with electrical tape.
  NOTE:
  - The CANL bus wire and CANH bus wire must be installed together at all times.
  - When installing, make sure that the wires are twisted.
  - CAN bus wires are likely to be influenced by electrical noise if the bus wires 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: Repairing Bus Wire With Solder
    Courtesy 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 wire is used.

Fig 2: Caution For Do Not Use Bypass Wiring Between Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CONNECTOR HANDLING
1. When checking resistance with a tester, insert the tester probes from the backside (harness side) of the connector.
  
  Fig 3: Checking Connector Resistance
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Use service wires to check the connector if it is impossible to check continuity from the rear of the connector.
PRECAUTIONS FOR INSPECTING OR REPLACING CAN JUNCTION CONNECTOR
1. If the CAN junction connector is removed from the vehicle for inspection or replacement, make sure to install the CAN junction connector and all wire harnesses to their original locations with tape and the clamps.
Fig 4: Precautions For Inspecting Or Replacing Can Junction Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002