GM Service Manual Online
For 1990-2009 cars only

The Scan Tool Data Definitions contains a brief description of all Lighting System related parameters available on the scan tool.

Body Control Module (BCM) Exterior Lighting

Battery Voltage: The scan tool displays battery voltage.

Folding Top Bell Crank Sw.: The scan tool displays the state of S14.

Folding Top Downstack Receiver Sw.: The scan tool displays the state of S13.

Folding Top Header Dowel Pin: The scan tool displays the state of S17.

Folding Top Header Latched: The scan tool displays the state of S18.

Full Cycle Counter: The scan tool displays how many times the folding top has been operated.

Hall Sensor Feed Status: The scan tool displays if there is voltage present on the 12 volt reference circuits of S1 and S2.

Inputs Correct to Start: The scan tool displays if conditions are correct for folding top operation.

LF RCL Latched Switch: The scan tool displays the state of S12.

LF RCL Unlatched Switch: The scan tool displays the state of S11.

Logic Battery: The scan tool displays the logic voltage of the Folding Top Control Module.

Luggage Barrier In Place: The scan tool displays if the luggage barrier in the rear compartment is in place.

Motor Command: The scan tool displays the number of amps the Folding Top Pump Motor is operating at.

Outputs Correct to Start: The scan tool displays if the outputs are in the proper state for folding top operation.

Pump Motor Command: The scan tool displays whether the Folding Top Pump Motor is active and the direction that it is turning when active.

Pump Over Temperature Sensor: The scan tool displays if the Folding Top Pump Motor is normal or over temperature. The Folding Top Pump Motor will not run if it is over temperature.

RCL Front Sw. Ready to Latch: The scan tool displays the state of S19A and S19B.

RCL Release Switch: The scan tool displays the state of S3 and S4.

Rear Compartment Lid Ajar: The scan tool displays if the trunk is open.

RF RCL Latched Switch: The scan tool displays the state of S10.

RF RCL Unlatched Switch: The scan tool displays the state of S9.

Too Cold For Top Operation: The scan tool displays if it is too cold for the top to operate.

Top Control Switch: The scan tool displays the state of the Folding Top Open/Close Switch.

Valve 1 Command: The scan tool displays if Valve 1 is commanded on or off.

Valve 2 Command: The scan tool displays if Valve 2 is commanded on or off.

Vehicle In Park: The scan tool displays Yes when the gear selector is in park.

Window Motor Output: The scan tool displays up or down when the windows are being commanded. The scan tool displays idle when no window commands are present.