Troubleshooting Contents: Notes
- During diagnosis, a DTC code associated with other system may be set when the ignition switch is turned on with connector(s) disconnected. On completion, confirm all systems for DTC code(s). If DTC code(s) are set, erase them all.
- When the M.U.T.-III detects a diagnostic trouble code, its display informs users whether a mechanical problem currently exists ("CURRENT TROUBLE ") or whether it existed before but normal operation has been restored ("PAST TROUBLE "). However, if an MFI, TPMS or SRS airbag-related DTC is set, "Active DTC/Stored DTC" is not displayed. In this case, follow the diagnosis procedure for current trouble.
- If a trouble, detected in a CAN communication-capable system, can be reproduced, diagnose the CAN bus lines (Refer to CAN BUS LINE DIAGNOSTICS CHART ).
Troubleshooting of electronic control systems for which the scan tool can be used follows the basic outline described below. Even in systems for which the scan tool cannot be used, part of these systems still follow this outline.
- STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Troubleshooting strategy is shown in each article.
- SYSTEM OPERATION AND SYMPTOM VERIFICATION TESTS
If verification of the symptom(s) is difficult, procedures for checking operation and verifying symptoms are shown.
- DIAGNOSTIC FUNCTION
The following trouble code diagnoses are shown.
- How to read diagnostic trouble codes
- How to erase diagnostic trouble codes
- Input inspection service points
- DIAGNOSTIC TROUBLE CODE CHART
If the scan tool displays a diagnostic trouble code, find the applicable inspection procedure according to this chart.
- SYMPTOM CHART
If there are symptoms, even though the scan tools show that no DTCs are set, inspection procedures for each symptom will be found by using this chart.
- DIAGNOSTIC TROUBLE CODE PROCEDURES
Indicates the inspection procedures corresponding to each diagnostic trouble code. (Refer to HOW TO USE THE INSPECTION PROCEDURES ).
- SYMPTOM PROCEDURES
Indicates the inspection procedures corresponding to each symptom listed in the Symptom Chart (Refer to HOW TO USE THE INSPECTION PROCEDURES ).
- SERVICE DATA REFERENCE TABLE
Inspection items and normal judgment values have been provided in this chart as reference information.
- CHECK AT ECU TERMINALS
Terminal numbers for the ECU connectors, inspection items, and standard values have been provided in this chart as reference information.