Can Communication System: Precaution

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

BUS LINE REPAIR
1. After repairing the bus line with solder, wrap the repaired part with vinyl tape.
  NOTE:
  - The CANL bus line and CANH bus line must be installed together at all times.
  - When installing, make sure to twist the lines.
  - 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 (3.94 in.).
  - Make sure the length between each twist of the wire connecting the connectors is 80 mm (3.15 in.) or less.
    
    Fig 1: Identifying Wire Harness Repair Area
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Do not use bypass wiring between the connectors.
  NOTE: The characteristic of the twisted wire harness will be lost if you use bypass wiring.
  
  Fig 2: Caution For Do Not Use By-Pass Wiring Between Connectors
  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 3: Inserting Tester Probes Into Connector
  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.
  
  Fig 4: Checking Continuity From Rear Of Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

PRECAUTION FOR DISCONNECTING BATTERY CABLE

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

SYSTEM REFERENCE

System Name	See procedure
Meter / Gauge System	INITIALIZATION
Front Power Seat Control System	INITIALIZATION