On Board Diagnosis Logic

WARNING: This page is about a different car, the 2004 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

If DTC P1568 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for DTC U1000, U1001. Refer to DTC U1000, U1001 CAN COMMUNICATION LINE .
If DTC P1568 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to DTC P0605 ECM
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this self-diagnosis.

Fig 1: Identifying DTC P1568 Conditions & Possible Causes

Courtesy of NISSAN MOTOR CO., U.S.A.