LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Oldsmobile >> 1997 >> Cutlass Base >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Diagnosis & Repair >> Low Engine Coolant Indicator Malfunctions
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Low Engine Coolant Indicator Malfunctions

  1. If BFC diagnostic system check was performed, go to next step. If BFC diagnostic system check was not performed, go to BFC DIAGNOSTIC SYSTEM CHECK  .
  2. Disconnect engine coolant level switch connector. Using scan tool, read BFC inputs. If low coolant level reads OK, go to next step. If low coolant level does not read OK, go to step 4).
  3. Replace engine coolant level switch. See appropriate I - SYSTEMS & COMPONENTS article in ENGINE PERFORMANCE section.
  4. Back out BFC 24-pin Pink connector C3, terminal B6 (Yellow/Black wire). Using scan tool, read BFC inputs. If low coolant level reads OK, go to next step. If low coolant level does not read OK, go to step 11).
  5. Check for a poor connection at BFC connector C3, terminal B6 (Yellow/Black wire). If a poor connection exists, go to next step. If connection is okay, go to step 7).
  6. Repair poor connection at BFC connector C3, terminal B6 (Yellow/Black wire).
  7. Check for a poor connection at Yellow/Black wire terminal of engine coolant level switch. If a poor connection exists, go to next step. If connection is okay, go to step 9).
  8. Repair poor connection at Yellow/Black wire terminal of engine coolant level switch.
  9. Using DVOM, check resistance between engine coolant level switch harness connector "A" (Yellow/Black wire) and ground. If resistance is less than infinite, go to next step. If resistance is not less than infinite, go to step 11).
  10. Repair short to ground in Yellow/Black wire between BFC and engine coolant level switch.
  11. Replace BFC. See REMOVAL & INSTALLATION  .
scientia non olet · About LEMON Manuals