GM Service Manual Online
For 1990-2009 cars only
Table 1: Folding Top Control (FTC) Module
Table 2: Body Control Module (BCM)
Table 3: Driver Door Module (DDM)
Table 4: Passenger Door Module (PDM)

Folding Top Control (FTC) Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ACCY or RUN, Vehicle in PARK, Folding Top Closed and Luggage Barrier In Place

5 Bow Lowered Pos. Switch

Inputs

Active / Inactive

Active

5 Bow Position CKT Status

Roof History Data

OK / Fault

OK

5 Bow Raised Pos. Switch

Inputs

Active / Inactive

Inactive

8-Digit GM Part Number

Module ID Information

Numeric

Varies

Battery Voltage Signal

Inputs

Volts

Varies

Calibration ID

Module ID Information

Numeric

Varies

Header Latch Switch

Inputs

Latched / Unlatched

Latched

Header Latch Switch

Roof History Data

Latched / Unlatched

Latched

Limit Switch Supply Voltage

Roof History Data

Present / Not Present

Present

Luggage Barrier In Place

Inputs

Yes / No

Yes

Luggage Barrier In Place

Roof History Data

Yes / No

Yes

Module Over Current Detected

Roof History Data

Yes / No

No

Module Over Voltage Detected

Roof History Data

No / Yes

No

Module Under Voltage Detected

Roof History Data

Yes / No

No

Motor Command

Outputs

amps

0.00 amps

Motor X Direction Command

Outputs

On / Off

Off

Motor Y Direction Command

Outputs

On / Off

Off

Power Mode

Roof History Data

Accy. Or Run / Not Accy. Or Run

Accy. Or Run

Power Pull Down Ajar Status

Inputs

Closed / Ajar

Closed

Prom ID

Module ID Information

Numeric

Varies

Pull Down Position CKT Status

Roof History Data

OK / Fault

OK

Pump Motor Temp. Sensor

Outputs

°C / °F

Varies

Pump Over Temperature Sensor

Roof History Data

Normal / Overtemp

Normal

Tonneau Latch Switch

Inputs

Closed / Ajar

Closed

Tonneau Open Limit Switch

Inputs

Active / Inactive

Inactive

Tonneau Position CKT Status

Roof History Data

OK / Fault

OK

Too Cold For Top Operation

Roof History Data

Yes / No

No

Top Closed Limit Switch

Inputs

Active / Inactive

Active

Top Control Switch

Inputs

Inactive / Open / Close / Invalid

Inactive

Top Open Limit Switch

Inputs

Active / Inactive

Inactive

Trunk Ajar

Roof History Data

Closed / Ajar

Closed

Valve 1 Command

Outputs

On / Off

Off

Valve 2 Command

Outputs

On / Off

Off

Valve 3 Command

Outputs

On / Off

Off

Vehicle In Park

Roof History Data

Yes / No

Yes

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ACCY or RUN, Vehicle in PARK, Folding Top Closed and Luggage Barrier In Place

Header Latch Switch

Keyless/Remote Start Data

Latched / Unlatched

Latched

Park Switch (Auto)

Keyless/Remote Start Data

Active / Inactive

Active

Tonneau Latch Sw.

Keyless/Remote Start Data

Closed / Ajar

Closed

Tonneau Pulldown Sw.

Keyless/Remote Start Data

Closed / Ajar

Closed

Tonneau Relay Cmd.

Keyless/Remote Start Data

Off / On

Off

Tonneau Release Switch

Keyless/Remote Start Data

Active / Inactive

Inactive

Trunk Ajar Switch

Keyless/Remote Start Data

Trunk Closed / Trunk Ajar

Trunk Closed

Driver Door Module (DDM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ACCY or RUN, Vehicle in PARK, Folding Top Closed and Luggage Barrier In Place

8-Digit GM Part Number

Data Display

Numeric

Varies

Window Normalization

Data Display

Yes / No

Yes

Passenger Door Module (PDM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ACCY or RUN, Vehicle in PARK, Folding Top Closed and Luggage Barrier In Place

8-Digit GM Part Number

Data Display

Numeric

Varies

Window Normalization

Data Display

Yes / No

Yes