Input Displays

Input displays are operated as defined under Selecting Test  . When troubleshooting a malfunction, the ECM, BCM, or LIGHTING 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.

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 are a summary of each parameter for Body Computer Module:

1. BI03 - DRIVER DOOR JAMB SWITCH
   
   BI03 is "LO" when the drivers door is open.
2. BI04 - PASSENGER DOOR JAMB SWITCH
   
   BI04 is "LO" when the passengers door is open.
3. BI08 - LOW REFRIGERANT PRESSURE SWITCH
   
   BI08 is "LO" when the system is low on refrigerant.
4. BI09 - WASHER FLUID LEVEL SWITCH
   
   BI09 is "LO" when vehicle is low on washer fluid.
5. BI10 - LOW COOLANT
   
   Displays "HI" with proper coolant level.
6. BI21 - BRAKE FLUID LEVEL
   
   Brake fluid level will read "HI" with proper brake fluid level.
7. BI30 - TIME/TEMP SWITCH
   
   BI30 is "LO" when the button is depressed.
8. BI51 - GENERATOR FEEDBACK
   
   Displayed as "LO" when there is a generator problem or engine not running.
9. BI55 - TRUNK CYLINDER SWITCH
   
   BI55 reads "HI" until the key is rotated to the unlock position in the trunk lock cylinder.
10. BI60 - THEFT ALARM
    
    BI60 indicates the status of the alarm output of the theft module. "LO" indicates that the theft deterrent has been set off. "HI" is a normal reading.
11. BI61 - DOOR LOCK SWITCH
    
    BI61 reads "HI" until the key is rotated to the unlock position in either door lock cylinder.
12. BI62 - SOFT TOP UP SWITCH
    
    BI62 will read "LO" with soft top up.
13. BI63 - HARD TOP CONNECTED
    
    BI63 will read "LO" with hard top installed and connected.
14. BI64 - OIL LEVEL SWITCH
    
    Will indicate LO with proper oil level.
15. BI90 - RIGHT TURN SIGNAL
    
    BI90 will indicate "LO" with right turn selected.
16. BI91 - LEFT TURN SIGNAL
    
    BI91 will indicate "LO" with left turn selected.
17. BI92 - HEADLAMP SWITCH
    
    BI92 will read "LO" with the headlamp switch on.
18. BI93 - HIGH BEAM SWITCH
    
    BI93 will indicate "HI" unless the headlamp dimmer switch is pulled.
19. BI94 - ANTI-LOCK/TRACTION CONTROL SYSTEM FAILURE
    
    BI94 reading will alternate between "HI" and "LO" during normal operation. A fixed reading of "HI" or "LO" indicates a problem in circuit 825 or an anti-lock brake system problem.
20. BI95 - BRAKE SWITCH
    
    BI95 will read "HI" with the service brake applied.
21. BI96 - SDD FAULT
    
    BI96 reads "LO" below 5 MPH and "HI" above 15 MPH.
22. BI97 - TCS ACTIVE
    
    BI97 reading will alternate between "HI" and "LO" during normal operation. A fixed display of "HI" indicates a problem in circuit 933. A fixed display of "LO" indicates the Traction control system is active, a problem in circuit 933, or a TCS problem.
23. BI98 - MINI-SPARE TIRE INSTALLED
    
    BI98 will read "HI" when the jumper that threads through the spare tire is disconnected. This input disables the traction control system.