Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Scan Tool Data Definitions
- Battery Voltage Signal 1
-
The scan tool displays 9.0-15.0 volts. The state of the battery voltage supplied to the RDM.
- Battery Voltage Signal 2
-
The scan tool displays 9.0-15.0 volts. The state of the battery voltage supplied to the RDM.
- Eight Digit GM Part Number
-
The scan tool displays the end model part number of the RDM.
- Front Tonneau Status
-
The scan tool displays Active/Retracted/Extended/Invalid which are the combination of the two folding top stowage compartment lid extension panel cylinder position sensor signal inputs to the RDM. These inputs will display the position of the folding top stowage compartment lid extension panel hydraulic cylinders.
- Folding Top Cyl. Extended Sen.
-
The scan tool displays the state of the folding top cylinder position extended sensor on the folding top hydraulic cylinder. The scan tool will display 0.35-1.33 volts when the sensor is active and the folding top is up and 2.39-4.04 volts when the sensor is inactive and the folding top is down.
- Folding Top Cyl. Retracted Sen.
-
The scan tool displays the state of the folding top cylinder position retracted sensor on the folding top hydraulic cylinder. The scan tool will display 2.39-4.04 volts when the sensor is inactive and the folding top is up and 0.35-1.33 volts when the sensor is active and the folding top is down.
- Header Latch Motor
-
The scan tool displays the current draw of the folding top outer latch actuator.
- Header Over Center Latch Switch
-
The scan tool displays Active/Inactive. The state of the folding top outer latch striker position switch as the dowel pin is positioned over center will be displayed as Active.
- Header Latch Switch
-
The scan tool displays Transition/Unlatched/Latched/Invalid. The inputs from the folding top outer latch position latched and unlatched switches, based on their combinations, will display the current position of the latch.
- Header Motor Command
-
The scan tool displays Idle/Unlatched/Latched/Invalid. This parameter will indicate the folding top outer latch actuator state output from the RDM.
- Ignition ON
-
The scan tool displays Yes/No. The state of the ignition switch if activated would display Yes.
- Ignition Voltage Signal
-
The scan tool displays Volts. The measurement of the ignition voltage received by the RDM.
- Julian Date of Build
-
The scan tool displays the date the RDM was built.
- Module Over Current Detected
-
The scan tool displays Yes/No. The module over current detected input to the RDM in the event an over current condition is present will display as Yes.
- Pump Motor Command
-
The scan tool displays the pump motor command output from the RDM as Idle/Forward/Reverse/Invalid.
- Rear Compartment Lid Ajar
-
The scan tool displays the state of the rear compartment lid.
- Roof Dowel Pin Switch
-
The scan tool displays Engaged/Disengaged. The state of the dowel pin as it enters the folding top outer latch striker position switch. This parameter will display engaged when the pin is fully inserted.
- Roof Close Cycle Counter
-
The scan tool displays the closing cycle completions measured in counts by the RDM.
- Roof Open Cycle Counter
-
The scan tool displays the opening cycle completions measured in counts by the RDM.
- Roof Panel State
-
The scan tool displays multiple states. The roof panel status of the RDM where the roof panel position is displayed as one of the multiple states listed.
- Roof System Status
-
The scan tool displays multiple states. The roof system status of the RDM where the roof system position is displayed as one of the multiple states listed.
- Shift Lock Solenoid Status
-
The scan tool displays the state of the shift lock solenoid.
- Software Part Number
-
The scan tool displays the RDMs software revision part number.
- Storage Latch Cyl. Retracted Left/Right Sen.
-
The scan tool displays the state of the left and right folding top stowage compartment latch cylinder position retracted sensors on the left and right folding top stowage compartment lid latch hydraulic cylinders. The scan tool will display 2.39-4.04 volts when the sensor is inactive and the folding top stowage compartment lid is latched and 0.35-1.33 volts when the sensor is active and the folding top stowage compartment lid is unlatched.
- Storage Lid Closed Left/Right Sensors
-
The scan tool displays the state of the left and right folding top stowage compartment lid latch sensors on the left and right folding top stowage compartment lid latches. The scan tool will display 0.82-1.80 volts when the sensor is active and the folding top stowage compartment lid is closed and 2.39-4.04 volts when the sensor is inactive and the folding top stowage compartment lid is open.
- Storage Lid Cyl. Extended Sen.
-
The scan tool displays the state of the folding top stowage compartment lid cylinder position extended sensor on the folding top stowage compartment lid hydraulic cylinder. The scan tool will display 2.39-4.04 volts when the sensor is inactive and the folding top stowage compartment lid is closed and 0.35-1.33 volts when the sensor is active and the folding top stowage compartment lid is open.
- Storage Lid Ext. Panel Extended Sen.
-
The scan tool displays the state of the folding top stowage compartment lid extension panel cylinder position extended sensor on the folding top stowage compartment lid extension panel hydraulic cylinder. The scan tool will display 2.39-4.04 volts when the sensor is inactive and the folding top stowage compartment lid extension panel is down and 0.35-1.33 volts when the sensor is active and the folding top stowage compartment lid extension panel is up.
- Storage Lid Ext. Panel Retracted Sen.
-
The scan tool displays the state of the folding top stowage compartment lid extension panel cylinder position retracted sensor on the folding top stowage compartment lid extension panel hydraulic cylinder. The scan tool will display 0.35-1.33 volts when the sensor is active and the folding top stowage compartment lid extension panel is down and 2.39-4.04 volts when the sensor is inactive and the folding top stowage compartment lid extension panel is up.
- Tonneau Cylinder Switch
-
The scan tool displays the state of the folding top stowage compartment lid cylinder position sensor based on the folding top position.
- Tonneau Latch Switch
-
The scan tool displays the state of the left and right folding top stowage compartment latch cylinder position sensors based on folding top position.
- Tonneau Panel State
-
The scan tool displays multiple states. The folding top stowage compartment status of the RDM where the folding top stowage compartment panel position is displayed as one of the multiple states listed.
- Tonneau Panel Safety Switch
-
The scan tool displays the state of the left and right folding top stowage compartment lid latch sensor based on folding top stowage compartment panel position.
- Tonneau Striker Switch
-
The scan tool displays the state of the left and right folding top stowage compartment lid latch switch based on folding top stowage compartment latch position.
- Top Control Switch
-
The scan tool displays the state of the folding top control switch.
- Top Cylinder Switch
-
The scan tool displays the state of the folding top cylinder position sensor based on folding top panel position.
- Valve 1 Command
-
The scan tool displays the RDM commanded state of the #1 hydraulic pump control valve.
- Valve 2 Command
-
The scan tool displays the RDM commanded state of the #2 hydraulic pump control valve.
- Valve 3 Command
-
The scan tool displays the RDM commanded state of the #3 hydraulic pump control valve.
- Valve 4 Command
-
The scan tool displays the RDM commanded state of the #4 hydraulic pump control valve.
- Year Module Build
-
The scan tool displays the year the BCM was built.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.