Oil Level Is Low Message

The BCM supplies and monitors voltage at terminal 1D1. When oil level switch is closed (normal oil level), BCM will sense low voltage. If oil level switch is open (low oil level), BCM will sense high voltage and illuminate OIL LEVEL IS LOW message. This will occur under the following conditions:

• No Code B334
• Coolant sensor operating properly
• Coolant temperature drop since last ignition cycle, greater than predetermined degrees

Fig 1: Oil Level Low Message Circuit Diagram