Contents Of Troubleshooting: Notes
CAUTION:
During diagnosis, a DTC associated with other system may be set when the power supply mode of the electric motor switch is changed to ON with connector(s) disconnected. On completion, confirm all systems for DTC(s). If DTC(s) are set, erase them all.
Troubleshooting of electronic control systems for which the M.U.T.-IIISE can be used follows the basic outline described below. Even in systems for which the M.U.T.-IIISE cannot be used, some of these systems still follow this outline.
CAUTION:
Do not diagnose the CAN bus line during driving. When the CAN bus line diagnosis starts, each ECU receives the communication stop signal from the M.U.T.-IIISE and stops CAN communication. However, during driving, each ECU continues communication and the diagnosis result may not be displayed normally.
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.
- *1 : For how to diagnose CAN bus lines, refer to LAN System - CAN Fundamental, Diagnosis and Repair Workflow TROUBLE DIAGNOSIS FLOW CHART .
- *2 : For the CAN bus diagnosis chart, refer to LAN System - CAN Fundamental, Diagnosis and Repair Workflow TROUBLE DIAGNOSIS FLOW CHART .
- *3 : When the M.U.T.-IIISE detects a DTC, its display informs users whether a mechanical problem currently exists or whether it existed before. The message for the former state identifies it as an "Active" and the message for the latter identifies it as a "Stored".
- *4 : For how to treat past trouble, refer to HOW TO TREAT PAST TROUBLE .
- *5 : For how to cope with intermittent malfunctions, refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS .