INTRODUCTION - Handling Precautions on Related Components IN-9 3. BRAKE SYSTEM The brake system is one of the most important safety components. Always follow the directions and notes given in section BR of the repair manual for the relevant model year when handling brake system parts. NOTICE: When repairing the brake master cylinder or TRAC system, bleed the air out of the TRAC system. 4. DRIVE TRAIN AND CHASSIS The drive train and chassis are components that can have great effects on the running performance and vibration resis- tance of the vehicle. After installing components in the sections listed in the table below, perform alignments to ensure correct mounting angles and dimensions.
Particularly accurate repair of the body must also be done to ensure correct alignment. HINT: Correct procedures and special tools are required for alignment. Always follow the directions given in the repair manual for the relevant model year during alignment and section DI of this manual. 5. ECU (ELECTRONIC CONTROL UNIT) Many ECUs are mounted in this vehicle. Take the following precautions during body repair to prevent damage to the ECUs. Before starting electric welding operations, disconnect the negative (-) terminal cable from the battery. When the negative (-) terminal cable is disconnected from the battery, memory of the clock and audio systems will be cancelled.
So before starting work, make a record of the contents memorized by each memory system. Then when work is finished, reset the clock and audio systems as before. When the vehicle has tilt and telescopic steering, power seat and outside rear view mirror, which are all equipped with memory function, it is not possible to make a record of the memory contents. So when the operation is finished, it will be necessary to explain this fact to the customer, and request the customer to adjust the features and reset the memory. Do not expose the ECUs to ambient temperatures above 80 C (176 F). NOTICE:
If it is possible the ambient temperature may reach 80 (176 F) or more, remove the ECUs from the vehicle before starting work. Be careful not to drop the ECUs and not to apply physical shocks to them. LX470 10 Component to be aligned Section of repair manual for relevant model year Front Wheels Suspension and Axle (SA) section Rear Wheels Suspension and Axle (SA) section Propeller Shaft Propeller Shaft (PR) section