Data Parameters

BCM DATA DISPLAYS:

While in this mode, the display will show eighteen data messages and the data value of each. This information will assist in tracking down emission or driveability problems, since the displays can be viewed while the vehicle is being driven.

Data displays are operated as follows:

1. Pressing the "OFF" button will stop the test selection process and return the display to the next available test type for the selected system.

2. Pressing the "LO" fan button will display the next smaller test number for the selected test type. If this button is touched with the lowest test number displayed, the highest test number will then appear.

3. Pressing the "HI" fan button will display the next larger test number for the selected test type. If this pad is touched with the highest test number displayed, the lowest test number will then appear.

BD20 The COMMANDED BLOWER VOLTAGE is displayed in volts from 0 to system voltage.

BD21 The "COOLANT TEMPERATURE" is displayed in degrees (°C) from -40° to 151°. This value is sent from the ECM/PCM to the BCM. If this circuit malfunctions as determined by the ECM/PCM, the ECM/PCM 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 MODE" is displayed as a number from 0 to 11. Each number is a code which represents the following air delivery modes:

0 = Auto - Recirc/MAX A/C
1 = Auto - A/C (vents)
2 = Auto - Bi-Level
3 = Auto - Heater-Defog
4 = Auto - Heater
5 = OFF
6 = Normal Purge
7 = Cold (DEF) Purge
8 = Forced/Def
9 = Forced/Heater
10 = Forced/Bi-Level
11 = A/C Purge

BD25 The "IN-CAR TEMPERATURE" is displayed in degrees (°C), from -40° to 102°.

BD26 The "ACTUAL OUTSIDE TEMPERATURE" is displayed in degrees (°C), from -40° to 93°. This valve represents actual sensor temperature and is not restricted by the features used to minimize engine heat affects on the customer display value.

BD27 The "HIGH SIDE TEMPERATURE" (condenser output) is displayed in degrees (°C) from -40° to 215°.

BD28 The "LOW SIDE TEMPERATURE" (evaporator input) is displayed in degrees (°C) from -40° to 93°.

BD32 The "SUNLOAD TEMPERATURE SENSOR" is displayed in degrees (°C) from -23 to 102.

BD40 The actual "FUEL LEVEL" is displayed in gallons from 0 to 17.0. This value represents actual sensor position and is not restricted by the features used to eliminate fuel slosh affects on the IPC display value.

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.

0 = No phone system present.
1 = Phone power "OFF," ignition "ON."
2 = Phone power "ON."
3 = Phone power "ON," no service.
4 = Roam service.
5 = Call in progress.
6 = Call received.
7 = System problem.

BD50 The BATTERY VOLTAGE is displayed in volts between 0 and 25.5.

BD51 The GENERATOR FIELD is displayed in percent (%). A value close to 0% represents minimum regulator oil time and a value close to 100% represents maximum regulator on time.

BD60 The "VEHICLE SPEED" is displayed in miles per hour from 0 to 159.

BD61 The "ENGINE SPEED" is displayed from 0 to 6,375.

BD70 The "CRUISE SERVO POSITION" is displayed in percent (%) from 0 to 100. A value close to 0% represents closed throttle position and a value close to 100% represents W.O.T.

BD71 The "OIL PRESSURE SENSOR" is displayed in pressure (psi) from 0 to 80.

BD98 The "IGNITION CYCLE" value is the number of times that the ignition has been cycled to "OFF" since a BCM trouble code was last detected. If no malfunction has been detected after 50.0 cycles, all BCM codes are cleared.

BD99 The "BCM PROM ID" is displayed as a number, up to four digits long, which can be used to verify that the proper PROM was installed in the BCM.