FOR USING HAND-HELD TESTER
- Before using the tester, the tester's operator manual should be read thoroughly.
- If the scan tool or tester cannot communicate with the ECU controlled systems when you have connected the cable of the tester to the DLC3 with the ignition switch and tester turned ON, there is a problem on the vehicle side or tester side. If 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. If communication is still impossible when the tester is connected to another vehicle, the problem is probably in the tester itself. Perform the Self Test procedures outlined in the tester operator's manual.
CUSTOMER PROBLEM ANALYSIS
HINT
- In troubleshooting, the problem symptoms must be confirmed accurately. Preconceptions should be discarded in order to give an accurate judgement. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time it occurred.
- As much information as possible should be gathered for reference. Even past problems that seem unrelated may also help in some cases. In the Diagnostic Section, a customer problem analysis table is provided for each system.
- 5 items are important points in the problem analysis
Important Points with Customer Problem Analysis
- What ______ Vehicle model, system name
- When _______ Date, time, occurrence frequency
- Where _______ Road conditions
- Under what conditions? _______ Running conditions, driving conditions, weather conditions
- How did it happen? _________ Problem symptoms
(Sample) Supplemental Restraint System check sheet.
Scheme 58
GLOSSARY OF SAE AND TOYOTA TERMS
This glossary lists all SAE-J1930 terms and abbreviations used in this information in compliance with SAE recommendations, as well as their TOYOTA equivalents.
