For 1990-2009 cars
Body Control Module Components
Power, Ground, and DLC

### 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 DTC 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 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.