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Toyota Corolla Repair Manual: General information

There are many ecu controlled systems used in the corolla. In general, ecu controlled system are considered to be very intricate and require a high level of technical knowledge and expert skill to troubleshoot.

The fact is, however, that if you proceed by inspecting the circuits one by one, troubleshooting of these systems is not complex. If you have adequate understanding of the system and basic knowledge of electricity, the problem can be accurately diagnosed and fixed. This manual is designed based on the above principle to help service technicians perform accurate and effective troubleshooting, and is compiled for the following major ecu controlled systems: the troubleshooting procedures are described on the following pages.

System

  1. Sfi system
  2.  Abs with ebd system
  3.  Electronic controlled automatic transaxle [ect]
  4.  Supplemental restraint system
  5.  Audio system
  6.  Combination meter
  7.  Power door lock control system
  8.  Wireless door lock control system
  9.  Toyota vehicle intrusion protection system
  10. Cruise control system

For using handheld tester

  1.  If the communication is normal when the tester is connected to another vehicle, inspect the diagnosis data link line (bus line) or ecu power circuit of the vehicle.
  2.  If the communication is still impossible when the tester is connected to another vehicle, the problem is probably in the tester itself, so perform the self test procedures outlined in the tester operators manual.
How to troubleshoot ecu controlled systems
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How to proceed with troubleshooting
Hint: carry out troubleshooting in accordance with the procedures on the following page. Here, only the basic procedures are shown. Details are provided in the diagnostics section, showing the m ...

Other materials:

Inspection
1. Thermostat Hint: the thermostat is numbered with the valve opening temperature. Immerse the thermostat in water and gradually heat the water.  check the valve opening temperature. Valve opening temperature: 80 to 84 c (176 to 183 f) Hint: if the valve opening temperatur ...

If the vehicle battery is discharged
The following procedures may be used to start the engine if the vehicles battery is discharged. You can also call your Toyota dealer or a qualified repair shop. If you have a set of jumper (or booster) cables and a second vehicle with a 12-volt battery, you can jump start your vehicle by foll ...

Capacity and distribution
Cargo capacity depends on the total weight of the occupants. (Cargo capacity) = (Total load capacity) (Total weight of occupants) Steps for Determining Correct Load Limit (1) Locate the statement The combined weight of occupants and cargo should never exceed XXX kg or XXX lbs. on your veh ...

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