Input Displays

WARNING: This page is about a different car, the 1989 Cadillac Allante. However, it is still accessible from the selected car via links, so may be relevant.

nput 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.

BI03 - DRIVER DOOR JAMB SWITCH

Displays "LO" when the driver's door is open.

BI04 - PASSENGER DOOR JAMB SWITCH

Displays "LO" when passenger's door is open.

BI08 - LOW REFRIGERANT PRESSURE SWITCH

Displays "LO" when system is low on refrigerant.

BI09 - WASHER FLUID LEVEL SWITCH

Displays "LO" when vehicle is low on washer fluid.

BI10 - LOW COOLANT

Displays "HI" with proper coolant level.

BI21 - BRAKE FLUID LEVEL

Brake fluid level will read "HI" with proper brake fluid level.

BI24 - (1987) PRND321 REVERSE SWITCH

Indicates status of reverse input, circuit 24. Should be "HI" with vehicle in reverse.

BI51 - GENERATOR FEEDBACK

Displayed as "LO" when there is a generator problem (or engine not running).

BI64 - "OIL LEVEL"

Will indicate "LO" with proper oil level.

LI01 - COURTESY LAMP SWITCH

Will read "HI" while the panel lamp switch is depressed.

LI03 - LIGHTS OFF SWITCH

Will read "HI" with the "Lights Off" switch depressed.

LI04 - TWILIGHT ENABLE SWITCH

Will read "HI" with twilight switch depressed.

LI05 - HAZARD LAMP SWITCH

Will read "HI" with the hazard switch depressed.

LI06 - PARK LAMP SWITCH

Will read "HI" with the park lamp switch depressed.

LI08 - FOG LAMP SWITCH

Will read "HI" with the fog lamp switch depressed.

L109 - REAR FOG LAMPS

Is not applicable to USA vehicles and will display "LO" at all times.