Allante V8-273 4.5L (1991)
Body Control Module: Reading and Clearing Diagnostic Trouble Codes
Data Parameters
BD20
The commanded blower voltage is read in volts from -2.9 to 18.0 Volts.
BD21
The coolant temperature is displayed in degrees Celsius (°C) from -40° to 151°C. This value is sent from the PCM/ECM to the BCM. If this
circuit malfunctions as determined by the PCM/ECM, the PCM/ECM will send the BCM a "Failsoft" value for display.
BD22
The commanded air mix door position is displayed in percent (%). A value close to 0% represents a cold air mix and a value close to 100%
represents a warm air mix.
BD23
The actual air mix door position is displayed in percent (%). This value should follow the commanded air mix door position (BD22) except
when the door is commanded beyond its mechanical limits of travel.
BD24
The air delivery mode is displayed as a number from 0 to 7. Each number is a code which represents the following air delivery modes:
0 = MAX A/C
1 = A/C
2 = Intermediate
3 = Heater
4 = OFF
5 = Normal Purge
6 = Cold Purge
7 = Front Defog
BD25
The in-car temperature is displayed in degrees Celsius (°C), from -40 to 102.
BD26
The actual outside temperature is displayed in degrees Celsius (°C), from -40° to 102°. This value represents actual sensor temperature and is
not restricted by the features used to minimize engine heat effects on the customer display value.
BD27
The A/C high side temperature (condenser output) is displayed in degrees Celsius (°C) from -40° to 215°.
BD28
The A/C low side temperature (evaporator input) is displayed in degrees Celsius (°C) from -40° to 102°.
BD32
The sunload temperature sensor is displayed in degrees Celsius (°C) from -40° to 102°.
BD40
The actual fuel level is read in gallons between 0 and 19.0 (the display can read to 25.0). This value represents actual sensor position and is not
restricted by the features used to eliminate fuel slosh affects on the customer display value.
BD41
The PRND321 is displayed in a four digit binary number unique to each gear position.
P = 0110
R = 0011
N = 1010
D = 1001
3 = 0000
2 = 0101
1 = 1100
BD42
The dimming pot is displayed in percent (%). A value close to 0% represents maximum dimming and a value close to 100% represents
maximum brightness.
BD43
The twilight delay pot is displayed in percent (%). A value close to 0% represents minimum delay time and a value close to 100% represents
maximum delay time.
BD44
The twilight photocell is displayed in percent (%). A value close to 0% represents daylight and value close to 100% represents darkness.
BD50
The battery voltage is read in volts between 0 and 16.3.
BD51
The generator field is displayed in percent (%). A value close to 0% represents minimum regulator on time and a value close to 100%
represents maximum regulator on time.
BD60
The vehicle speed is displayed in miles per hour (M.P.H.) from 0 to 159.
BD61
The engine speed is displayed in RPM from 0 to 6375.
