Scan Tool Data Definitions

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

Backup Light Request: The scan tool displays Active or Inactive. When the BCM energizes the backup light relay, the scan tool will display Active. When the BCM de-energizes the backup light relay, the scan tool will display Inactive.

Battery Volts: The scan tool displays 0.0-16.0 volts. The battery voltage represents the system voltage measured at the BCM ignition feed input.

Calibration Version: The scan tool displays the BCM calibration version number for service identification.

Column Feedback: The scan tool displays Active or Inactive. When the steering column lock motor is LOCKED, the scan tool will display Inactive. When the steering column lock motor is UNLOCKED, the scan tool displays Active.

Column Lock State: The scan tool displays the current column lock state. This data represents what column lock functional mode the BCM is in. The BCM enters different column lock states based upon information received from various inputs associated with the column lock system. Refer to Steering.

Column Lock/Unlock A: The scan tool displays Active or Inactive. When the BCM LOCKS the steering column, the scan tool will display Active. When the BCM UNLOCKS the steering column, the scan tool displays Inactive.

Column Lock/Unlock B: The scan tool displays Active or Inactive. When the BCM UNLOCKS the steering column, the scan tool will display Active. When the BCM LOCKS the steering column, the scan tool displays Inactive.

Console Switch Illumination: The scan tool displays 0-100%. The illumination percentage varies based upon the dimming switch information sent by the IPC on the serial data line. When the dimming switch is rotated to bright, the console switch illumination percentage will increase. When the dimming switch is rotated to dim, console switch illumination percentage will decrease. The headlamps or park lamps must be ON to read console illumination data.

Controller Part Number: The scan tool displays the BCM part number for service identification.

Current Power Mode: The scan toot 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.).

Door Key Cyl. Unlock Switch: The scan tool displays Active or Inactive. When the door lock cylinder is rotated to LOCK, the scan tool will display Active. When the door lock cylinder is released, the scan tool displays Inactive.

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.

DRL Ambient Light Sensor: The scan tool displays 0.0-5.0 volts. The voltage level varies based upon the ambient light level at the sensor. When light levels are high (Light), voltage will increase. When light levels are low (Dark), voltage will decrease. The BCM uses this information for automatic headlamp operation.

EEPROM Calibration ID: The scan tool displays the BCM EEPROM calibration number for service identification.

Fog Light Illumination: The scan tool displays 0-100%. The illumination percentage varies based upon the dimming switch information sent by the IPC on the serial data line. When the dimming switch is rotated to bright, the fog light switch illumination percentage will increase. When the dimming switch is rotated to dim, fog light switch illumination percentage will decrease. The headlamps or park lamps must be ON to read fog light illumination data.

Folding Top Ajar Switch: The scan tool displays Open or Closed. When the folding top is open, the scan tool will display Open. When the folding top is closed, the scan tool displays Closed.

Folding Top Release Switch: The scan tool displays Active or Inactive. When the folding top switch is pressed, the scan tool will display Active. When the switch is released, the scan tool displays Inactive.

Front Fog Lamp Switch: The scan tool displays Active or Inactive. When the front fog light switch is pressed, the scan tool will display Active. When the switch is released, the scan tool displays Inactive.

Hardware Version: The scan tool displays the BCM hardware version number for service identification.

Hatch/Trunk Ajar Sw: The scan tool displays Open or Closed. When the hatch/trunk is open, the scan tool will display Open. When the hatch/trunk is closed, the scan tool displays Closed.

Hatch/Trunk Release Switch: The scan tool displays Active or Inactive. When the hatch/trunk release switch is pressed, the scan tool will display Active. When the switch is released, the scan tool displays Inactive.

Headlamp Off Switch: The scan tool displays Active or Inactive. When the headlamps are OFF, the scan tool will display Active. When the headlamps are ON, the scan tool displays Inactive.

Hood Ajar (export): The scan tool displays Open or Closed. When the hood is open, the scan tool will display Open. When the hood is closed, the scan tool displays Closed.

Horn Relay Feedback: The scan tool displays Active or Inactive. When the BCM energizes the horn relay, the scan tool will display Active. When the BCM de-energizes the horn relay, the scan tool will display Inactive.

HVAC Bulb Illumination: The scan tool displays 0-100%. The illumination percentage varies based upon the dimming switch information sent by the IPC on the serial data line. When the dimming switch is rotated to bright, the HVAC illumination percentage will increase. When the dimming switch is rotated to dim, HVAC illumination percentage will decrease. The headlamps or park lamps must be ON to read HVAC illumination data.

HVAC Rear Defog Switch: The scan tool displays Active or Inactive. When the rear defogger switch is pressed, the scan tool will display Active. When the switch is released, the scan tool displays Inactive.

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.).

Inadvertent Load Monitor: The scan tool displays Active or Inactive. When the BCM energizes the inadvertent load monitor relay, the scan tool will display Active. When the BCM de-energizes the inadvertent load monitor relay, the scan tool will display Inactive. The inadvertent load monitor system is used for battery run down protection. The BCM removes battery voltage to accessories that were left on by de-energizing the monitored load relay.

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.

Left Turn Monitor: The scan tool displays Active or Inactive. When the BCM detects the left turn signal is ON, the scan tool will display Active. When the BCM detects the left turn signal is OFF, the scan tool will display Inactive.

Left Turn Signal Relay: The scan tool displays Active or Inactive. When the BCM energizes the left DRL relay, the scan tool will display Active. When the BCM de-energizes the left DRL relay, the scan tool will display Inactive.

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.

Passkey Resister Signal: The scan tool displays 0.0-5.0 volts. The voltage level represents the PASS-Key(R) resistance value.

Passkey State: The scan tool displays the current PASS-Key(R) state. This data represents what PASS-Key(R) functional mode the BCM is in. The BCM enters different PASS-Key(R) states based upon the information the BCM receives from the ignition switch (switch position and key resistance value).

PRNDL Illumination: The scan tool displays 0-100%. The illumination percentage varies based upon the dimming switch information sent by the IPO on the serial data line. When the dimming switch is rotated to bright, the PRNDL illumination percentage will increase. When the dimming switch is rotated to dim, PRNDL illumination percentage will decrease. The headlamps or park lamps must be ON to read PRNDL illumination data.

Rear Defog Relay: The scan tool displays Active or Inactive. When the BCM energizes the rear defogger relay, the scan tool will display Active. When the BCM de-energizes the rear defogger relay, the scan tool will display Inactive.

Rear Fog Lamp Switch: The scan tool displays Active or Inactive. When the rear fog light switch is pressed, the scan tool will display Active. When the switch is released, the scan tool displays Inactive.

Right Turn Monitor: The scan tool displays Active or Inactive. When the BCM detects the right turn signal is ON, the scan tool will display Active. When the BCM detects the right turn signal is OFF, the scan tool will display Inactive.

Right Turn Signal Relay: The scan tool displays Active or Inactive. When the BCM energizes the right DRL relay, the scan tool will display Active. When the BCM de-energizes the right DRL relay, the scan tool will display Inactive.

Software Major Version: The scan tool displays the BCM major software version number for service identification.

Software Minor Version: The scan tool displays the BCM minor software version number for service identification.

TCS Switch: The scan tool displays Active or Inactive. When the TCS switch is pressed, the scan tool will display Active. When the switch is released, the scan tool displays Inactive.

Theft Deterrent State: The scan tool displays the current theft deterrent state. This data represents what theft deterrent functional mode the BCM is in. The BCM enters different states based upon information received from various inputs associated with the theft deterrent system.