CONTENTS OF TROUBLESHOOTING <EXCEPT PHEV>



caution During diagnosis, a diagnosis code associated with other system may be stored when the ignition switch is turned on with connector(s) disconnected. On completion, confirm all systems for diagnosis code(s). If diagnosis code(s) are stored, erase them all.
warning Since the radiator fan rotates during CAN bus line diagnostics, make sure that no one is servicing the engine compartment before diagnosing the CAN bus line. Since the CAN communication stops when diagnosing the CAN bus line, the ETACS-ECU detects the time-out of the engine-ECU, and activates the radiator fan to prevent overheating as fail-safe.
Troubleshooting of electronic control systems for which the M.U.T.-III can be used follows the basic outline described below. Even in systems for which the M.U.T.-III cannot be used, some of these systems still follow this outline.

1. STANDARD FLOW OF DIAGNOSIS TROUBLESHOOTING


Troubleshooting sections are based on the diagnostic flow as below. If the diagnostic flow is different from that given below, or if additional explanation is required, the details of such differences or additions will also be listed.
Diagnosis method



2. SYSTEM OPERATION AND SYMPTOM VERIFICATION TESTS


If verification of the symptom(s) is difficult, procedures for checking operation and verifying symptoms are shown.

3. DIAGNOSIS FUNCTION


Details specific to individual systems are described.

4. DIAGNOSIS CODE CHART


Diagnosis codes and diagnostic items are shown.

5. DIAGNOSIS CODE PROCEDURES


Indicates the inspection procedures corresponding to each diagnosis code (Refer to How to Use Inspection Procedures ).

6. TROUBLE SYMPTOM CHART


If there are trouble symptoms even though the M.U.T.-III does not find any diagnosis codes, Inspection procedures for each trouble symptom will be found by means of this chart.

7. SYMPTOM PROCEDURES


Indicates the inspection procedures corresponding to each symptom classified in the Symptom Chart (Refer to How to Use Inspection Procedures ).

8. DATA LIST REFERENCE TABLE


Inspection items and normal judgement values have been provided in this chart as reference information.

9. ACTUATOR TEST TABLE


The Actuator Test item numbers, inspection items, and judgement values have been provided in this chart as reference information.

10. CHECK AT ECU TERMINALS


Terminal numbers for the ECU connectors, inspection items, and judgement values have been provided in this chart as reference information.

11. INSPECTION PROCEDURE BY USING AN OSCILLOSCOPE


When there are inspection procedures using an oscilloscope, these are described here.