Can Communication System - Diagnostics: Precaution

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.
SRS AIRBAG SYSTEM HANDLING PRECAUTIONS
1. The LEXUS LS430 is equipped with an SRS (Supplemental Restraint System) such as the driver's airbag and front passenger airbag. Failure to carry out service operations in 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 PRECAUTION ).
Fig 1: [Identifying Bus Line]
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
BUS LINE REPAIR
1. After repairing the bus line with solder, wrap the repaired part with vinyl tape (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
  NOTE:
  - The CANL bus line and CANH bus line must be installed together all the time.
    When installing, make sure to twist them.
    
    CAN bus lines are likely to be influenced by noise if the bus lines are not twisted.
  - The difference in length of the CANL bus line and CANH bus line should be within 100 mm (3.937 in.).
  - Leave approximately 80 mm (3.150 in.) loose in the twist around the connector.
  Fig 2: Precaution While Using Bypass Wiring Between Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Do not use bypass wiring between the connectors.
  NOTE: The feature of the twisted wire harness will be lost if you use bypass wiring.
Fig 3: Inserting Tester Probes Into Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CONNECTOR HANDLING
1. When inserting tester probes into a connector, insert them from the rear of the connector.
  
  Fig 4: Checking Continuity Between Connectors From Rear Side
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Use a repair wire to check the connector if it is impossible to check continuity from the rear of the connector.

PRECAUTION FOR DISCONNECTING THE BATTERY CABLE

NOTE: When disconnecting the negative (-) battery terminal, initialize the following system after the terminal is reconnected.

SYSTEM NAME AND PAGE REFERENCE

System Name	See Procedure
Front Power Seat Control System	INITIALIZATION