Introduction: Overview Toyota Echo I

Scheme 5

1. INDEX: The search mechanism substitutes for a traditional index found in manuals. To assist you in verifying you have located the correct article, the applicable year(s) subcategory and model are given at the top of every article.
2. PRECAUTION: In each article, PRECAUTIONS may be given or referred to that pertain to all repair operations contained in that article. Read these precautions before starting any repair task.
3. TROUBLESHOOTING: TROUBLESHOOTING tables may be included for each system to help you diagnose the problem and identify the cause. The fundamentals of how to proceed with troubleshooting are described in «HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS»(ref-174402-S10485401102005040400000). Be sure to read this before performing troubleshooting.
4. PREPARATION Some articles list the SST (Special Service Tools), recommended tools, equipment, lubricant and SSM (Special Service Materials) which should be prepared before beginning the operation and explains the purpose of each one.
5. REPAIR PROCEDURES Most repair operations begin with an exploded view illustration. It identifies the components and shows how the parts fit together. For example (Scheme 5) The procedures are presented in a step-by-step format: Illustrations show what to do and where to do it. The task headings tells what to do. The detailed text tells how to perform the task and gives other information such as specifications and warnings. This format provides the experienced technician with a FAST TRACK to the information needed. The upper case task heading, can be read at a glance when necessary, and the text below it provides detailed information. Important specifications and warnings always stand out.
6. REFERENCES: have been kept to a minimum. However, when they are required you are given a link to the procedure or key words to search for in the event of a multi-year article.
7. SPECIFICATIONS are presented in bold type throughout the text or in a torque table. You never have to leave the article to look up specifications.
8. WARNINGS, CAUTIONS AND NOTES: WARNINGS, indicate the possibility of personal injury if the procedure is not properly performed. CAUTIONS: indicate the possibility of damage to the vehicle if the procedure is not properly performed. NOTES: are helpful hints to assist technicians in completing the procedure.
9. Measurements: In these articles, measurements are normally listed in English and metric.

VEHICLE IDENTIFICATION NUMBER

VEHICLE IDENTIFICATION NUMBER

The vehicle identification number is stamped on the vehicle identification number plate and the certification label, as shown in the illustration.

Scheme 6

1. Vehicle Identification Number Plate. (Scheme 6)
2. Certification Label.

GENERAL INFORMATION

A large number of ECU controlled systems are used in the Echo. In general, the ECU controlled system is considered to be a very intricate system requiring a high level of technical knowledge and expert skill to troubleshoot. However, the fact is that if you proceed to inspect the circuits one by one, troubleshooting of these systems is not complex. If you have adequate understanding of the system and a basic knowledge of electricity, accurate diagnosis and necessary repair can be performed to locate and fix the problem. This information is designed through emphasis from the above standpoint to help service technicians perform accurate and effective troubleshooting, and is compiled for the following major ECU controlled systems.

The troubleshooting procedure and how to make use of it are described in the articles linked to the Troubleshooting table.

Troubleshooting Table

FOR USING OBD II SCAN TOOL OR HAND-HELD TESTER

1. Before using the scan tool or tester, the scan tool's instruction book or tester's operator manual should be read thoroughly.
2. If the scan tool or tester cannot communicate with ECU controlled systems when you have connected the cable of the scan tool or tester to DLC3, turned the ignition switch ON and operated the scan tool, there is a problem on the vehicle side or tool side. If communication is normal when the tool is connected to another vehicle, inspect the diagnosis data link line (Buss line) or ECU power circuit of the vehicle. If communication is still not possible when the tool is connected to another vehicle, the problem is probably in the tool itself, so perform the Self Test procedures outline in the Tester Operator's Manual.

TERMS & ABBREVIATIONS

For terms and abbreviations, see ABBREVIATIONS .

See also:
• ABBREVIATIONS