LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2000 >> Eldorado ESC >> Repair and Diagnosis >> Body & Frame >> Seats >> Memory Systems >> Diagnostic Tests >> DTC B1658: EEPROM Checksum Error (Memory Seat Module) >> Diagnostic Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Procedure

  1. If power seats system check was performed, go to next step. If power seats system check was not performed, go to POWER SEATS DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn ignition on. Clear any DTCs. Turn ignition off and back on again. Recheck for DTCs. If DTC B1658 is still present, go to next step. If DTC is no longer present, go to POWER SEATS DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  3. Replace MSM. See MEMORY SEAT MODULE  under REMOVAL & INSTALLATION. After repairs, go to next step.
  4. Turn ignition off. Reconnect all disconnected components and connectors. Turn ignition on and clear DTCs. If DTC is no longer present, go to POWER SEATS DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
scientia non olet · About LEMON Manuals