• Code: 4103
• Description: BD initialization error M
  After polygon motor M is driven, the BD signal is not detected for 1 s.
• Causes: Defective connector cable or poor contact in the connector. Defective PD PWB M. Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC8) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB M. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4104
• Description: BD initialization error Y
  After polygon motor Y is driven, the BD signal is not detected for 1 s.
• Causes: Defective connector cable or poor contact in the connector. Defective PD PWB Y. Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC12) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB Y. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4201
• Description: BD steady-state error K
  The BD signal is not detected.
• Causes: Defective connector cable or poor contact in the connector. Defective PD PWB K. Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC5) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB K. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4202
• Description: BD steady-state error C
  The BD signal is not detected.
• Causes: Defective connector cable or poor contact in the connector. Defective PD PWB C. Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC10) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB C. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4203
• Description: BD steady-state error M
  The BD signal is not detected.
• Causes: Defective connector cable or poor contact in the connector. Defective PD PWB M. Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC8) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB M. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4204
• Description: BD steady-state error Y
  The BD signal is not detected.ector.
• Causes: Defective connector cable or poor contact in the connector. Defective PD PWB Y. Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC12) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB Y. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4300
• Description: Polygon motor phase error
  ASIC won’t settle in completion of phase adjustment for 2 s after a BD signal is detected.
• Causes: Defective laser scanner unit. Defective engine PWB.
• Remedy: Defective laser scanner unit. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4600
• Description: LSU cleaning motor error
  After LSU cleaning motor is driven, the ready signal does not turn to L within 2 s. After LSU cleaning motor is stabilized, the ready signal is at the H level for 1 s continuously.
• Causes: Defective connector cable or poor contact in the connector. Defective drive transmission system of motor. Defective LSU cleaning motor. Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. LSU cleaning motor and engine PWB (YC21)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective LSU cleaning motor. Replace the LSU cleaning motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.