Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Troubleshooting Low Oil Indicator - Procedure (ASN 0988-04)
Reference number: ASN 0988-04
TROUBLESHOOTING LOW OIL INDICATOR - PROCEDURE
TECHNICAL SERVICE BULLETIN
TROUBLESHOOTING LOW OIL INDICATORS
Model(s): 1986-88 Acura Legend
Group: Electrical
Bulletin No.: ASN 0988-04
Date: September, 1988
SERVICE INFORMATION
Here's how to track down the cause of a Legend Information Center that reads "CHECK ENGINE OIL LEVEL" all of the time:
First disconnect the BLU/BLK wire from the oil level switch at the oil pan. Ground the wire and turn the ignition off and on. If this wipes the low oil warning from the Info Center, then the oil level switch is the problem. (By the way, all the Legend ETMs say the oil level switch is "Closed with low oil;" they should say it's "Open with low oil.")
If the low oil warning is still illuminated, measure the voltage between the BLU/BLK wire and body ground with the ignition on. You should have approximately 5V.
If there's no voltage at the switch end of the BLU/BLK wire, check for voltage where it connects to the Information Center control unit. If there's no voltage there either, replace the control unit. If you get 5V, there's an open in the BLU/BLK wire.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.