BCM Data Parameters:
- BD20 Commanded blower voltage in volts from 0 to 18.0 volts.
- BD21 Coolant temperature displayed in degrees Celsius (°C) from -40 to 151. This value is sent from ECM to BCM. If circuit malfunctions, ECM will send BCM a FAILSOFT value for display.
- BD22 Commanded air mix door position displayed in percent. Value close to 0% represents cold air mix and value close to 100% represents warm air mix.
- BD23 Actual air mix door position displayed in percent. This value should follow commanded air mix door position (BD22) except when door is commanded beyond its mechanical limits of travel.
- BD24 Air delivery mode displayed as number from 0 to 10. Each number is code which represents following air delivery modes: 0 - Auto-Recirc/MAX A/C outlets 1 - Auto-A/C outlets 2 - Auto-Bi-Level outlets 3 - Auto-Heater-Def outlets 4 - Auto-Heater outlets 5 - OFF 6 - Normal purge 7 - Cold (DEF) purge 8 - Forced/Def outlets 9 - Forced (Fan) Heater outlets 10 - Forced (Fan) Bi-Level outlets 11 - A/C Purge
- BD25 In-car temperature is displayed in degrees Celsius (°C) from -40 to 102.
- BD26 Actual outside temperature displayed in degrees Celsius (°C) from -40 to 58. This value represents actual sensor temperature and is not buffered by software.
- BD27 A/C High side temperature (condenser output) displayed in degrees Celsius (°C) from -40 to 215.
- BD28 A/C Low side temperature (evaporator input) displayed in degrees Celsius (°C) from -40 to 93.
- BD32 Sunload temperature sensor displayed in degrees Celsius (°C) from -40 to 102.
- BD40 Actual fuel level read in gallons between 0 to 25.5. Value represents actual sensor position and is not restricted by features used to eliminate fuel slosh affects on IPC display value.
- BD42 Dimming pot displayed in percent. Value close to 0% represents maximum dimming and value close to 100% represents maximum brightness.
- BD43 Twilight delay pot displayed in percent. Value close to 0% represents minimum delay time and value close to 100% represents maximum delay time.
- BD44 Twilight Photocell displayed in percent. Value close to 0% represents daylight and value close to 100% represents darkness.
- BD50 Battery voltage read in volts between 0 and 25.5.
- BD51 Generator field displayed in percent. Value close to 0% represents minimum regulator on time and value close to 100% represents maximum regulator on time.
- BD60 Vehicle speed displayed in miles per hour from 0 to 159.
- BD61 Engine speed displayed in RPM from 0 to 6375.
- BD70 Cruise servo position displayed in percent from 0 to 100%. Value close to 0% represents at rest position and value close to 100% represents wide open throttle.
- BD71 Oil pressure sensor displayed in PSI from 0 to 80.
- BD98 Ignition cycle value is the number of times that the BCM has been turned OFF since BCM trouble code was last detected. After 99 ignition cycles, (where each OFF, CRANK, OFF cycle counts as 2), without any malfunction being detected, all BCM codes are cleared.
- BD99 BCM PROM I.D. displayed as number, up to four digits long, which can be used to verify that proper PROM was installed in BCM.