Circuit Description

Memory seat functions are operated when voltages from left power seat switch are first applied to Seat Control Module (SCM). SCM then stores voltage of front vertical position sensor when either memory button is depressed. SCM provides a steady 5-volt supply (Purple wire) and ground (Black wire) to front vertical position sensor. Front vertical position sensor provides a return voltage on signal wire (Brown/White wire) to SCM. Depending on seat location, voltage on signal wire varies from 0.10-4.78 volts. When on memory recall is requested, SCM applies voltage to motor until position sensor voltage equals stored value, moving seat to preset position.

DTC B2605 will set if front vertical position sensor input to SCM is less than 0.10 volt or greater than 4.78 volts for 2 seconds or more. DTC B2605 will store as a history code in SCM memory. No driver warning will be displayed. DTC can only set as history even if malfunction is current. Memory function and operation of faulty position sensor will be disabled.

Under all fault conditions, DTC B2605 will clear automatically when front vertical position sensor to SCM is within operating range of 0.10-4.78 volts for 2 seconds or more. Current and history DTCs can be cleared using scan tool or Instrument Panel Cluster (IPC) clearing DTCs feature.