CAN Communication System

PRECAUTION

1. STEERING SYSTEM HANDLING PRECAUTIONS

a. Care must be taken when replacing parts. Incorrect replacement could affect the performance of the steering system and result in hazardous driving.

2. SRS AIRBAG SYSTEM HANDLING PRECAUTIONS

a. 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.

3. BUS LINE REPAIR




a. 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 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.




b. Do not use bypass wiring between the connectors.

NOTE: The feature of the twisted wire harness will be lost if you use bypass wiring.

4. CONNECTOR HANDLING




a. When inserting tester probes into a connector, insert them from the rear of the connector.




b. Use a repair wire to check the connector if it is impossible to check continuity from the rear of the connector.

5. PRECAUTION FOR DISCONNECTING THE BATTERY CABLE

NOTE: When disconnecting the negative (-) battery terminal, initialize the following system after the terminal is reconnected.
- Front Power Seat Control System

INITIALIZATION

INITIALIZE FRONT POWER SEAT CONTROL SYSTEM

a. The power seat ECU must be initialized under any of the following conditions.
- The battery is disconnected.
- The D/C cut fuse is replaced.
- The power seat switch (power seat ECU) is replaced.
- The power seat assembly is removed from the vehicle.

b. Initialize the power seat ECU as follows.
1. Using the seat switches, fully slide the seat forward, fully recline the seatback forward, and fully raise the seat cushion and headrest.
2. Using the seat switches, fully slide the seat rearward, fully recline the seatback rearward, and fully lower the seat cushion and headrest.