Seville V8-273 4.5L (1989)
Figure 3
Some 1986-1990 Eldorados and Sevilles may experience low refrigerant codes showing a code B446, codes B446 and B447, or code B448. To diagnose
and repair these conditions follow the appropriate trouble tree in Figure 1, Figure 2, and/or Figure 3.
On 1988-1990 vehicles a premature low refrigerant code B446/B447 may be displayed in cool ambients (45~ - 65~ F). This condition can be repaired by
following the trouble tree (Figure 1) for diagnosis and, if necessary, replacing the PROM in accordance with the chart below:
PROM CHART
NOTE:
Failure to recover, evacuate, and recharge with the proper amount of refrigerant may result in recurrence of low refrigerant indicator.
