Fail Safe Mode
WARNING: This page is about a different car, the 2002 Nissan Xterra and 2002 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.
When this malfunction is detected, ECM enters fail safe mode. MIL illuminates and ECM determines that ECT is fixed at 104°F (40°C) when ignition is first turned on, then increases based on engine run time. After 4 minutes, ECM determines that ECT is fixed at 176°F (80°C). Cooling fan operates while engine is running.