OBD-II Self-Diagnosis

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

A/T self-diagnosis is performed by the TCM in combination with the ECM. The results can be read through the blinking pattern of the A/T CHECK indicator or the malfunction indicator lamp (MIL). Refer to the table in SELF-DIAGNOSTIC RESULT TEST MODE 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 " HOW TO ERASE DTC " to complete the repair and avoid unnecessary blinking of the MIL.
The following self-diagnostic items can be detected using ECM self-diagnostic results mode^* only when the A/T CHECK indicator lamp does not indicate any malfunctions.

park/neutral position (PNP) switch
^* : For details of OBD-II, refer to "ON BOARD DIAGNOSTIC (OBD) SYSTEM ON BOARD DIAGNOSTIC (OBD) SYSTEM ".
Certain systems and components, especially those related to OBD, may use a new style slide-locking type harness connector.