Diagnostic Procedure 1

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

Self-diagnostic results:

"ECM INT CIRC-IMMU" displayed on CONSULT-II screen

Confirm SELF-DIAGNOSTIC RESULTS "ECM INT CIRC-IMMU" displayed on CONSULT-II screen. Ref. part No. B.
Replace ECM.
Perform initialization with CONSULT-II.
For initialization, refer to "CONSULT-II OPERATION MANUAL IVIS/NVIS".

Fig 1: Self Diagnosis Display
Courtesy of NISSAN MOTOR CO., U.S.A.