Malibu V6-191 3.1L VIN M SFI (1997)
Oil Level Warning Indicator: Description and Operation
The Check Oil indicator (amber) will be illuminated when the Powertrain Control Module (PCM) reads the Oil Level Switch and transmits a Class 2
message to the Body Function Controller (BFC) indicating there is a Low Oil Level Condition. The Body Function Controller (BFC) will then command
the Check Oil indicator ON over the Serial Peripheral Interface (SPI) interface to the Instrument Cluster. If the Low Oil Level option is false all Class 2
activity on the part of the Body Function Controller (BFC) will stop. The Body Function Controller (BFC) will not send out any request for the Low Oil
Level condition command and will not issue a Low Oil Level condition report. In the event of a loss of Body Function Controller (BFC) or Powertrain
Control Module (PCM) Class 2 serial data the Check Oil indicator will not illuminate unless the indicator was illuminated when the event occurred. In
the event of an Serial Peripheral interface (SPI) data link failure, the Check Oil indicator will not illuminate unless the indicator was illuminated prior to
the Serial Peripheral interface (SPI) data link failure.
