B1552

DTC B1552 Loss Of BCM Keep Alive Memory:

CIRCUIT DESCRIPTION
A DTC B1552 indicates that the keep alive or the long term memory in the Body Control Module (BCM) is reset. It is a normal occurrence whenever the power or the ground is removed from the BCM. For example: anytime the battery is disconnected and reconnected.

CONDITIONS FOR SETTING THE DTC
The following cause FTC B1552 to set:
^ A loss of battery input to the BCM.
^ A loss of ground to the BCM.

ACTION TAKEN WHEN THE DTC SETS
The BCM memory resets Keep Alive Memory (KAM) to initial default values.

CONDITIONS FOR CLEARING THE DTC
^ The conditions for the fault are no longer present.
^ The use of the scan tool.
^ A history Diagnostic Trouble Code (DTC) will clear after 50 consecutive ignition cycles if the condition for the fault is no longer present.

DIAGNOSTIC AIDS
Check the following if DTC B1552 sets without a battery disconnect:
^ Battery condition
^ Good terminal contact at B3
^ Good terminal contact at C1
^ A good clean and tight connection at G103.