GM Service Manual Online
For 1990-2009 cars only
Table 1: Roof
Table 2: HVAC
Table 3: Driver Door Module (DDM)
Table 4: Passenger Door Module (PDM)

Roof

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ACCY or RUN, Vehicle in PARK, Valet Switch Inactive/OFF, Folding Top Closed and Cargo Cover installed

Battery Voltage Signal

Outputs

Volts

Varies

Deck Lid Ajar Status

History Roof

Known / Unknown

Known

Deck Lid Ajar Status

History Trunk

Known / Unknown

Known

Deck Lid Ajar Status

Inputs

Deck Closed / Deck Ajar

Deck Closed

Deck Lid Closed Switch

Inputs

Active / Inactive

Inactive

Deck Lid Extended

Inputs

Active / Inactive

Inactive

Deck Lid Latch Status

History Roof

Cleared / Not Cleared

Cleared

Deck Lid Latch Status

History Trunk

Clear / Not Clear

Clear

Deck Lid Latch Switch

Inputs

Deck Closed / Deck Open

Deck Closed

Driver Window Operation

History Roof

Enabled / Disabled

Enabled

Driver Window Position Status

History Roof

Ok / Out of Limit

Ok

Folding Top Calibrated

History Roof

Yes / No

Yes

Folding Top Close Reference Position

Inputs

Counts

Varies

Folding Top Open Reference Position

Inputs

Counts

Varies

Folding Top Position Sensor

Inputs

Counts

Varies

Folding Top Status

Inputs

Extended / Mid / Retracted / Invalid

Extended

Front Tonneau Position Sensor

Inputs

Counts

Varies

Front Tonneau Status

Inputs

Invalid / Tonneau Open / Mid / Tonneau Closed

Tonneau Closed

Front Tonneau Close Reference Position

Inputs

Counts

Varies

Front Tonneau Open Reference Position

Inputs

Counts

Varies

Header Latch Limit Switches

Inputs

Latched / Mid / Unlatched / Invalid

Latched

Limit Switch Supply Voltage

History Roof

Present / Not Present

Present

Limit Switch Supply Voltage

History Trunk

Present / Not Present

Present

Luggage Barrier In Place

History Roof

Yes/No

Yes

Luggage Barrier Limit Switch

Inputs

Open / Closed

Closed

Motor Feedback

Outputs

Amps

0.00 amps

Motor Feedback Current

History Roof

OK / High

OK

Motor Feedback Current

History Trunk

OK / High

OK

Motor X Direction Command

Outputs

On/Off

Off

Motor Y Direction Command

Outputs

On/Off

Off

Passenger Window Operation

History Roof

Enabled / Disabled

Enabled

Passenger Window Position Status

History Roof

Ok / Out of Limit

Ok

Position Sensor Status

History Trunk

Ok / Error

Ok

Position Sensors Status

History Roof

Ok / Error

Ok

Power Mode Active

History Roof

Yes / No

Yes

Pump Motor Temp. Sensor

Outputs

Fahrenheit / Celsius

Varies

Pump Over Temperature Sensor

History Roof

Overtemp / Normal

Normal

Pump Over Temperature Sensor

History Trunk

Over Temp / Normal

Normal

Rear Tonneau Close Reference Position

Inputs

Counts

Varies

Rear Tonneau Open Reference Position

Inputs

Counts

Varies

Rear Tonneau Position Sensor

Inputs

Counts

Varies

Rear Tonneau Status

Inputs

Invalid / Tonneau Open / Mid / Tonneau Closed

Tonneau Closed

System Timer

History Roof

OK / Expired

OK

System Timer

History Trunk

OK / Expired

OK

System Voltage

History Roof

OK / Low

OK

System Voltage

History Trunk

Ok / Low

Ok

Too Cold For Top Operation

History Roof

Yes / No

No

Top Closed Limit Switch

Inputs

Active / Inactive

Active

Top Control

History Roof

Inhibited/Enabled

Enabled

Top Control Switch

Inputs

Idle / Top Closed / Top Open / Invalid

Idle

Top Position Error

History Trunk

Yes / No

No

Trunk Control

History Trunk

Inhibited / Enabled

Enabled

Valet Status

History Roof

Active / Inactive

Inactive

Valet Switch Status

History Trunk

Active / Inactive

Inactive

Valve 1 Command

Outputs

On/Off

Varies

Valve 2 Command

Outputs

On/Off

Varies

Valve 3 Command

Outputs

On/Off

Varies

Valve 4 Command

Outputs

On/Off

Varies

Valve 5 Command

Outputs

On/Off

Varies

Vehicle in PARK

History Roof

Yes / No

Yes

Vehicle in PARK

History Trunk

Yes / No

Yes

HVAC

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ACCY, Vehicle in PARK, Valet Switch Inactive/OFF, Folding Top Closed

Valet Switch

Data

Active/Inactive

Inactive

Driver Door Module (DDM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ACCY, Vehicle in PARK, Valet Switch Inactive/OFF, Folding Top Closed

Battery Voltage Signal

Data

Volts

Varies

Window Normalization

Data

Yes / No

Yes

Passenger Door Module (PDM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ACCY, Vehicle in PARK, Valet Switch Inactive/OFF, Folding Top Closed

Battery Voltage Signal

Data

Volts

Varies

Window Normalization

Data

Yes / No

Yes