GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 SSR 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Power Folding Top Inoperative

Diagnostic Aids

Complete the check list prior to performing the diagnosis:

    • Vehicle is in PARK.
    • The ignition is in ACCY or RUN, with the engine OFF.
    • The cargo lid is closed and the release operates properly.
    • The brake and transmission shifter interlock (BTSI) is operating properly.
    • The power windows operate properly. If either window is not normalized, folding top operation may be inhibited since it is important for the roof door module (RDM) to know their position.
    • Inspect for any restricted or leaking hydraulic hoses and repair as necessary.
    • Inspect for any loose, misaligned, or damaged components and repair as necessary.

Step

Action

Yes

No

Schematic Reference: Folding Top Schematics

Connector End View Reference: Power Roof Systems Connector End Views

1

Did you review the Power Roof Description and Operation, perform the necessary inspections and complete the Diagnostic Aids check list?

Go to Step 2

Go to Symptoms - Roof

2

Operate the folding top.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3
  1. Using the scan tool, navigate to the Roof System Data parameters.
  2. View the Top Control Switch parameter.
  3. Press the folding top control switch to the OPEN and CLOSE positions.

Did the parameter display Top Open and Top Closed?

Go to Step 4

Go to Step 11

4
  1. Navigate the scan tool to Special Functions in Roof, Roof System.
  2. Command the roof system Open and roof system Close.

Can you hear the motor respond with each command?

Go to Step 5

Go to Step 9

5

Command the header latch to latch and unlatch.

Can you hear the motor respond with each command?

Go to Step 7

Go to Step 6

6
  1. Disconnect the harness connector at the folding top outer latch actuator.
  2. Connect a test lamp between the control circuits at the harness connector.
  3. Command the header latch to latch and unlatch.

Does the test lamp illuminate with each command?

Go to Step 14

Go to Step 15

7

Inspect for the following Roof Door Module (RDM) Data parameters in the roof closed and open positions. Refer to Scan Tool Data List and Scan Tool Data Definitions for typical values and definitions.

Refer to Folding Top Manual Operation if necessary.

    • Front Tonneau Status
    • Header Over Center Latch Switch
    • Header Latch Switch
    • Rear Compartment Lid Ajar
    • Roof Dowel Pin Switch
    • Shift Lock Solenoid Status
    • Tonneau Cylinder Switch
    • Tonneau Latch Switch
    • Tonneau Safety Switch
    • Tonneau Striker Switch
    • Top Cylinder Switch
    • Folding Top Cyl. Extended Sen.
    • Folding Top Cyl. Retracted Sen.
    • Storage Latch Cyl. Retracted Left/Right Sen.
    • Storage Lid Closed Left/Right Sensors
    • Storage Lid Cyl. Extended Sen.
    • Storage Lid Ext. Panel Extended Sen.
    • Storage Lid Ext. Panel Retracted Sen.

Does the scan tool display the correct data parameters?

Go to Step 17

Go to Step 8

8

Test for one of the following conditions of the affected parameter circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

    • An open, high resistance, short to ground, or short to voltage in the signal circuit as applicable
    • An open, high resistance, or short to ground in the supply voltage circuit as applicable
    • An open or high resistance in the ground circuit as applicable

Did you find and correct the condition?

Go to Step 28

Go to Step 23

9
  1. Disconnect the harness connector at the folding top pump motor assembly.
  2. Connect a test lamp between the control circuits at the harness connector.
  3. Command the roof system Open and Roof system close.

Does the test lamp illuminate with each command?

Go to Step 20

Go to Step 10

10
  1. Disconnect the harness connector at both folding top motor relays.
  2. Connect a test lamp between the pump relay coil supply voltage circuit and each of the control circuits.
  3. Command the roof system Open and roof system Close.

Does the test lamp illuminate with each command?

Go to Step 19

Go to Step 16

11
  1. Remove the folding top switch from the harness connector.
  2. Connect a jumper wire to a good ground.
  3. View the Top Control Switch parameter.
  4. Connect the other end of the jumper wire to the connector terminals of the folding top switch down signal circuit and then to the folding top switch up signal circuit.

Did the parameter display Top Open and Top Closed?

Go to Step 12

Go to Step 13

12

Test the folding top switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 18

13

Test the folding top switch up signal and folding top switch down signal circuits for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 21

14

Inspect for the following conditions that may affect folding top operation and repair as necessary:

    • Mechanical binding
    • Loose, misaligned, or damaged components
    • Poor connections at the folding top outer latch actuator connection--Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 27

Go to Step 22

15

Test the folding top outer latch actuator control circuits for the following:

    • An open
    • A high resistance
    • A short to ground
    • A short to voltage

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 21

16

Test for one of the following conditions. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

    • An open, high resistance, or short to ground in either of the folding top motor relay control circuits
    • An open, high resistance, or short to ground in either of the folding top motor relay supply voltage circuits
    • An open or high resistance in either of the folding top motor relay ground circuits

Did you find and correct the condition?

Go to Step 28

Go to Step 21

17
  1. Place the folding top in an approximately 75 percent open position. Refer to Folding Top Manual Operation if necessary.
  2. Use the scan tool output controls to activate each of the hydraulic pump solenoid valves individually to test for proper valve mechanical operation.

Does the top move with each individual valve activation?

Go to Step 21

Go to Step 20

18

Inspect for poor connections at the harness connector of the folding top switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 24

19

Inspect for poor connections at the harness connector of the inoperative folding top motor relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 25

20

Inspect for the following conditions that may affect folding top operation and repair as necessary.

    • Mechanical binding
    • Loose, misaligned, or damaged components
    • Restricted or leaking hydraulic hoses
    • An open, high resistance, or short to ground in the inoperative solenoid valve control circuit
    • Poor connections at the harness connector of the folding top pump motor--Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 26

21

Inspect for poor connections at the harness connector of the RDM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 27

22

Replace the folding top outer latch actuator. Refer to Folding Top Latch Replacement - Center .

Go to Step 28

--

23

Replace the affected component. Refer to the correct component replacement procedure.

Did you complete the replacement?

Go to Step 28

--

24

Replace the folding top switch. Refer to Side Window and Multifunction Switch Replacement in Doors.

Did you complete the replacement?

Go to Step 28

--

25

Replace the inoperative folding top motor relay. Refer to Relay Replacement in Wiring Systems.

Did you complete the replacement?

Go to Step 28

--

26

Replace the folding top pump motor assembly. Refer to Folding Top Pump with Motor Replacement .

Did you complete the replacement?

Go to Step 28

--

27

Replace the RDM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 28

--

28
  1. Turn OFF the ignition.
  2. Disconnect any jumper wires.
  3. Connect all previously disconnected components.
  4. Replace any open fuses, if necessary.
  5. Turn the ignition to ACCY or RUN, with the engine OFF.
  6. Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3