General Information

Power Seat Module

B1957 Rear Height Motor Or Sensor Error - General Information

Component Location





General Description

IMS (Integrated Memory System) is a system which can memorize the position of power seat (PTM), tilt/telescope handle (SCM), side mirror (DDM/ADM) by position sensor and restores them to a previous position. (Memory function is not allowed during driving for safety reason)

DTC Description

PSM sets this code when amount of change of the Rear height motor sensor is little than 8edge (4pulse) for 1 sec. This means that rear height motor/sensor stuck due to open or short in circuit or external cause (compulsive restriction)

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data




Fig.1) Normal waveform of Rear Height Motor position sensor