INTRODUCTION IN-9 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.
ABBREVIATIONS USED IN THIS MANUAL For convenience, the following abbreviations are used in this manual. ABS Antilock Brake System A/C Air Conditioner assy assembly ECT Electronic Controlled Transmission ECU Electronic Control Unit e.g. Exempli Gratia (for Example) Ex. Except 4WD Four Wheel Drive Vehicles in. inch LH Left-hand LHD Left-hand Drive MIG Metal Inert Gas M/Y Model Year PPS Progressive Power Steering RH Right-hand RHD Right-hand Drive SRS Supplemental Restraint System SSM Special Service Materials w/ with w/o without