Input

When troubleshooting a malfunction, the PCM/ECM, BCM, or Lighting input displays 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:

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.

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.

BI10 BI10 displays HI with proper coolant level.

BI21 BI21 will read HI with proper brake fluid level.

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 BI55 reads HI until the key is rotated to the unlock position in the trunk lock cylinder.

BI60 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.

BI61 BI61 reads HI until the key is rotated to the unlock position in either door lock cylinder.

BI62 BI62 will read LO with the soft top up.

BI63 BI63 will read LO with hard top installed and connected.

BI64 BI64 will indicate LO with proper oil level.

BI90 BI90 will indicate LO with right turn selected.

BI91 BI91 will indicate LO with left turn selected.

BI92 BI92 will read LO with the headlamp switch on.

BI93 BI93 will indicate HI unless the headlamp dimmer switch is pulled.

BI94 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.

BI95 BI95 will read HI with the service brake applied.

BI96 BI96 reads LO below 5 M.P.H. and HI above 15 M.P.H..

BI97 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.

BI98 BI98 will read high when the jumper that threads through the spare tire is disconnected. This input disables the traction control system.