Input

BCM INPUT DISPLAYS:

When troubleshooting a malfunction the BCM 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 could 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. 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 "PANEL LAMP" switch display is "LO" when the panel lamp switch is in the "OFF" position.

BI02 The "PARK LAMP" switch display is "LO" when the park lamp switch is in the "OFF" position.

BI03 The driver door ajar switch "LF DR AJAR" display is "LO" when the drivers door is ajar.

BI04 The passenger door ajar switch "RT DR AJAR" display is "LO" when the passenger door is ajar.

BI05 The "DOOR JAMB" switch display is "LO" when the driver's or passenger's door is open.

BI06 The "DOOR HNDLE" switch display is momentarily "LO" when either outside door handle is lifted.

BI08 The low refrigerant pressure switch "A/C PRESS" display is "LO" when the system is low on refrigerant.

BI09 The "WASH FLUID" display is "LO" when the vehicle is low on windshield washer fluid.

BI17 The "TURN SIGNAL" input (Blank Display) is "HI" when turn signal switch is in the "OFF" position. When either directional is "ON," the input will toggle between "LO" and "HI," with bulb illuminating in "HI" state.

BI21 The low brake fluid "BRK FLUID" display is "LO" when brake fluid level is low.

B122 The park brake switch "PARK BRAKE" display is "LO" when the parking brake is applied.

B124 The "FOGLAMP" switch display is "LO" whenever the switch is pressed.

BI25 The "SEAT BELT" switch display is "HI" when the drivers seatbelt is fastened.

BI51 The generator feedback "GEN I TERM" display is "LO" when there is a generator problem (or engine not running).

BI78 The "HEADLAMPS" display is "HI" whenever the headlamp switch is "ON."

BI82 The "TWILIGHT" display is "LO" whenever the headlamp switch is "ON."

BI83 The "HI BEAM" display is "LO" whenever the high beam switch is "ON."

BI88 The "LOW OIL" display will be "LO" when the engine oil level is low.