Start the engine, and warm it up to normal operating temperature (the radiator fan comes on twice).
?4.
Test-drive the vehicle in D position/mode, accelerate slowly until the vehicle speed reaches 37 mph (60 km/h) on a flat road, then keep the vehicle at speeds about 37 mph (60 km/h) for at least 60 seconds.
?5.
Monitor the OBD STATUS for P1890 in the DTCs MENU with the HDS.
Intermittent failure, the system is OK at this time. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?