IN-8 INTRODUCTION 2. 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. 3. DRIVE TRAIN AND CHASSIS The drive train and chassis are components–that can have great effects on the running performance and vibration resistance 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. 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 4. ECU (ELECTRONIC CONTROL UNIT) Locations of ECUs Cruise Control ECU Auto Antenna Control Relay Theft Deterrent ECU A/C Amplifier PPS ECU Daytime Running Light Relay (Main) Blower Control (for Canada) Relay Traction ECU R/B No. 4 (for 2JZ–GTE) ABS ECU J/B No. 1 (for 2JZ–GE) Integration Relay Stereo Power Amplifier ABS and Traction ECU (for 2JZ–GTE) ABS Shift Lock ECU Engine Control Center Airbag Deceleration Module Sensor Assembly Sensor (Engine ECU)