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DTC 21: Reclining Pulse Abnormal: Description

When the power seat switch assembly (reclining switch) or No. 2 power seat switch assembly (reclining switch) have been operated, the position control ECU assembly outputs driving voltage to drive the rear seat with adjuster frame assembly LH (reclining motor). When the rear seat with adjuster frame assembly LH (reclining motor) is driven, its pulse sensor sends the seat position information via pulse signal to the position control ECU assembly. Based on this signal, the position control ECU assembly stores the seat reclining angular position.

DTC No. DTC Detection Condition Trouble Area
21 When the rear seat with adjuster frame assembly LH (reclining motor) is activated, 0.3 seconds pass without any edges in the pulse signal, and this occurs 7 times.
  • Rear seat with adjuster frame assembly LH (reclining motor)
  • Harness or connector
  • Position control ECU assembly