GM Service Manual Online
For 1990-2009 cars only

BCM Scan Tool Data Definitions

The BCM Scan Tool Data Definitions contains a brief description of all Retained Accessory Power related BCM parameters available on the scan tool.

Ignition 1: The scan tool displays ON or OFF. When the BCM detects ignition 1 is present , the scan tool will display Yes. When the BCM does not detect ignition 1, the scan tool will display OFF. This ignition switch information is sent on the serial data line to systems that relay on this information to preform certain functions (RAP, wake-up, etc.).

Ignition 2: The scan tool displays ON or OFF. When the BCM detects ignition 2 is present , the scan tool will display Yes. When the BCM does not detect ignition 2, the scan tool will display OFF. This ignition switch information is sent on the serial data line to systems that relay on this information to preform certain functions (RAP, wake-up, etc.).

Ignition 3: The scan tool displays ON or OFF. When the BCM detects ignition 3 is present , the scan tool will display Yes. When the BCM does not detect ignition 3, the scan tool will display OFF. This ignition switch information is sent on the serial data line to systems that relay on this information to preform certain functions (RAP, wake-up, etc.).

Key In Ignition: The scan tool displays Active or Inactive. When the BCM detects the key is IN the ignition switch, the scan tool will display Active. When the key is removed from the ignition switch, the scan tool will display Inactive.

Key Out Ignition: The scan tool displays Active or Inactive. When the BCM detects the key is OUT of the ignition switch, the scan tool will display Active. When the key is IN the ignition switch, the scan tool will display Inactive.

Current Power Mode: The scan tool displays the current power mode. The BCM determines ignition switch position from it's ignition inputs. This ignition switch information is sent on the serial data line to systems that relay on this information to preform certain functions (RAP, wake-up, etc.).

Driver Door Ajar Switch: The scan tool displays Open or Closed. When the driver door is open, the scan tool will display Open. When the driver door is closed, the scan tool displays Closed.

Passenger Door Ajar Switch: The scan tool displays Open or Closed. When the passenger door is open, the scan tool will display Open. When the passenger door is closed, the scan tool displays Closed.

LDCM Scan Tool Data Definitions

The LDCM Scan Tool Data Definitions contains a brief description of all Retained Accessory Power related LDCM parameters available on the scan tool.

Door Ajar: The scan tool displays Closed or Ajar. When the driver door is open the scan tool displays Ajar. When the driver door is closed the scan tool displays closed.

RDCM Scan Tool Data Definitions

The RDCM Scan Tool Data Definitions contains a brief description of all Retained Accessory Power related RDCM parameters available on the scan tool.

Door Ajar: The scan tool displays Closed or Ajar. When the passenger door is open the scan tool displays Ajar. When the passenger door is closed the scan tool displays closed.