On Board Diagnosis Logic

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Do not use ECM ground terminals when measuring Input/Output voltage. Doing so may lead to ECM's transistor damage. Use ground other than ECM, such as engine ground.

For on board diagnosis logic, see Fig 1.

Fig 1: Identifying On Board Diagnosis Logic For DTC P0182 Or DTC P0183: Fuel Tank Temperature Sensor

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