Circuit Description

Driver's door switch circuit provides input to Left Door Control Module (LDCM). When memory No. 1 or 2 button is depressed, LDCM recognizes input as a memory recall request. LDCM provides power and ground to both memory switches. Ground is supplied through activated memory switch to LDCM memory select switch input. LDCM detects low voltage at memory select switch input, LDCM activates appropriate memory functions and send a message over serial data line to other systems responsible for memory recall functions (radio, seats, etc.). LDCM monitors both memory select switch input circuits and determines how long a ground has been applied.

DTC B2244 will set if ground is applied for more than 20 seconds. DTC B2244 will store as a history code in LDCM memory. No driver warning will be displayed. DTC can only set as history even if malfunction is current.

Under all fault conditions, DTC B2244 will clear automatically when LDCM no longer detects a short to ground at memory No. 2 switch for more than 20 seconds. Current and history DTCs can be cleared using scan tool or Instrument Panel Cluster (IPC) clearing DTCs feature.