OBD-II Self-Diagnosis

• A/T self-diagnosis is performed by the TCM in combination with the ECM. Refer to the table on [SDT FUNCTION (AT) ] for the indicator used to display each self-diagnostic result.
• The self-diagnostic results indicated by the MIL are automatically stored in both the ECM and TCM memories.

  Always perform the procedure on [ SDT FUNCTION (AT)  ] to complete the repair and avoid unnecessary blinking of the MIL. 

For details of OBD-III, refer to [OBD SYSTEM: INTRODUCTION ] (QR25DE), [OBD SYSTEM: INTRODUCTION ] (VQ40DE).

• Certain systems and components, especially those related to OBD, may use the new style slide-locking type harness connector. For description and how to disconnect  , refer to [HARNESS CONNECTOR: DESCRIPTION ].