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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:

Using the AUX port
To use the AUX port, connect a portable player, press the AUDIO button, then select AUX to display the audio control screen. Connecting a portable audio player ■Operating portable audio players connected to the multimedia system The volume can be adjusted using the vehicle's audio ...

Starting the engine
1 Check that the parking brake is set. ► Vehicles without a multi-information display 2 Continuously variable transmission: Check that the shift lever is set in P. Firmly depress the brake pedal. Manual transmission: Check that the shift lever is set in N. Firmly depress the clutch peda ...

Active Protection
Concept Active Protection prepares occupants and the vehicle for a possible accident in critical driving or collision situations. General information Active Protection consists of various PreCrash functions, which can vary depending on the equipment. The system is used to detect certain critical dr ...

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