Seville V8-300 4.9L (1991)
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.
BD90
This is the option bit 1 reading that the BCM receives from the EEPROM. To determine the proper option 1 value, start with "0" and use the
table below:
If vehicle is equipped with:
Add
USA car (all except Canadian and export cars)
128
Heated windshield (option code C50)
32
Seville
1
Export displays ( option code MAE)
64
Unleaded telltale disable (opt. code NM8,MAJ)
16
Low fuel telltale disable (option code MAE)
2
BD91
This is the option bit 2 reading that the BCM receives from the EEPROM. For this production year, all cars should have a "2" stored for this
option bit.
BD98
The ignition cycle value is the number of times that the BCM has been turned "OFF" since a BCM trouble code was last detected. After 100
ignition cycles without any malfunction being detected, all BCM codes are cleared.
BD99
This is used to identify which PROM is currently being used in the BCM.
Input
When troubleshooting a malfunction, the PCM, BCM, or IPC input display can be used to determine if the switched inputs can be properly interpreted.
When one of the various input tests is selected, the state of that device is displayed as "HI" or "LO". In general, the "HI" and "LO" refer to the input
terminal voltage for that circuit. The display also indicates if the input changed state so that the technician can activate or deactivate any listed device and
return to the display to see if it changed state. If a change of state occurred, an "X" will appear next to the HI/LO indicator, otherwise a "O" will remain
displayed. The "X" will only appear once per selected input, although the HI/LO indication will continue to change as the input changes. Some tests are
momentary and the "X" can be used as an indication of a change.
The following is a list of BCM inputs:
BI01
The courtesy lamp panel switch display is "LO" when courtesy lights are on from switch.
BI02
The park lamp switch display is "LO" when the park lamp switch is in the off position.
BI03
The driver (front) door ajar switch display is "LO" when the driver's (front) door is ajar.
BI04
The passenger (rear) door ajar switch display is "LO" when the passengers (rear) door is ajar.
BI05
The door jamb switch display is "LO" when any door is open.
BI06
The door handle switch display is momentarily "LO" when either front outside door handle button is depressed.
BI07
The trunk open switch display is "LO" when the trunk is open.
BI08
The low refrigerant pressure switch display is "LO" when the system is low on refrigerant.
BI09
The washer fluid level switch display is "LO" when the vehicle is low on washer fluid.
BI30
The TEMP/TIME switch display is "LO" when the button is depressed.
BI51
The generator feedback display is LO when there is a generator problem (or engine not running).
BI55
The CCR fault line is LO below 5 M.P.H. and HI above 15 M.P.H..
Output
When troubleshooting a malfunction, the PCM/ECM and BCM output cycling can be used to determine if the output tests can be actuated regardless of
the inputs and normal program instructions. Once a test in outputs has been selected, the test will display HI and LO for three seconds in each state to
