On Board Diagnosis Logic

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

If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will rise.

When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is indicated.

This self-diagnosis has the one trip detection logic.

Fig 1: DTC Detecting Condition Table

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

CAUTION: When a malfunction is indicated, be sure to replace the coolant. Refer to "CHANGING ENGINE COOLANT ". Also, replace the engine oil.

Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to use coolant with the proper mixture ratio.
After refilling coolant, run engine to ensure that no water-flow noise is emitted.