Allante V8-273 4.5L (1991)
With proper oil level, the BI64 should be "LO". (The sensor grounds the 5 volt circuit from the BCM when oil level is OK; a ground on the circuit is
"'LO" in diagnostics.)
If oil level is low, BI64 should be "HI". (The sensor is open with low oil level and the BCM 5 volt circuit remains at 5 volts; "HI" in diagnostics.)
The BCM only checks oil level at key on when the engine has cooled by 15~ C or more since the last engine run cycle. Example: If the engine was
running at 90~ C coolant temp at key off and is at 85~ C coolant temp at key on, the BCM will ignore oil level sensor input. If the engine is at 90~ C at
key off and is at 25~ C at key on, the BCM will check the sensor status. If the status is "HI" or open, the BCM will display a low oil level warning.
The oil level sensor component location for all model years is shown in the 1987/1988 Final Edition Service Information Manual on page 8A-201-0,
Figure C.
WARRANTY INFORMATION
VEHICLE SERIES
Operation
Operation Description
Number
C
D
E
J
K
V
Switch, Engine Oil Level Indicator -
N2215
.4
Replace (1991)
Sensor, Engine Oil Level - Replace
N4580
.4
(1987-1990)