Serial Communication Circuit

CIRCUIT DESCRIPTION
Memory and return command signals and mutua communication during return operation pass between the Power Seat ECU and the Tilt & Telescopic ECU in the form of serial data communication. Signals activating memory and return operation are sent from the Tilt & Telescopic ECU to the Power Seat ECU. When the Power Seat ECU receives a memory signal, its position is memorized, and when a return signal is received, the position is returned to the memorized position.
During return operation, Tilt & Telescopic ECU and Power Seat ECU continue mutual communication constantly, and if a malfunction should occur in the communication wire, the Tilt & Telescopic ECU stops signal output to the Power Seat ECU and stops return operation. However, the Tilt & Telescopic ECU continues return operation. Even with power return stopped, manual switch operation of the power seat is possible.





WIRING DIAGRAM





INSPECTION PROCEDURE