GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 XLR 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 DTC B1310

Circuit Description

The folding top closed switch signals the folding top control (FTC) module when the folding top closes against the windshield header. The FTC module checks the signal circuit at least once every 300 milliseconds. The folding top closed switch will close as the RH receiver detects the RH pin from the folding top. The accessory voltage supplied to the folding top closed switch will be applied through the limit switch through the hard top connected signal circuit, to the FTC module. The FTC module will then continue through the operating sequences, completing the operation.

DTC Descriptor

This diagnostic procedure supports the following DTC.

DTC B1310 Convertible Top Main Movement Up Sensor Circuit

Conditions for Running the DTC

The battery voltage is between 9.0-16.0 volts

Conditions for Setting the DTC

The FTC module detects the folding top closed switch is active, closed, when the folding top position sensor indicates the top is open, past the folding top open reference position.

Action Taken When the DTC Sets
    • Stores a current and history DTC B1310 in the FTC module.
    • The folding top operation is suspended.
    • The FTC module sends a class 2 message to the driver information center (DIC), displaying: TOP NOT SECURE.

Conditions for Clearing the DTC
    • This DTC will clear on the current status after the condition for setting the fault is corrected.
    • A history DTC will clear after 50 consecutive ignition cycles without a fault present.
    • History and current DTC can be cleared using the scan tool.

Diagnostic Aids

If the DTC does not reset after the code is cleared, then the switch may be the intermittent fault. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Step

Action

Yes

No

Schematic Reference: Folding Top Schematics

Connector End View Reference: Power and Grounding Connector End Views in Wiring Systems

1

Did you perform the Vehicle Control Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Wait four minutes.
  4. Open the hydraulic fluid bypass valve located above the FT motor, turning it counterclockwise.
  5. Manually move folding top to access RH receiver pin. Refer to Opening the Folding Top .
  6. With a scan tool, observe the Top Closed Limit Switch parameter in the data list for the folding top control module.

Does the scan tool display Off?

Go to Step 3

Go to Step 4

3
  1. Activate the folding top closed switch.
  2. With the scan tool, observe the Top Closed Limit Switch parameter.

Does the Top Closed Limit Switch parameter change state?

Go to Diagnostic Aids

Go to Step 4

4
  1. Turn OFF the ignition.
  2. Disconnect the folding top closed switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Top Closed Limit Switch parameter.

Does the scan tool display Off?

Go to Step 7

Go to Step 5

5

Test the signal circuit of the folding top closed switch for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 6

6

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

Did you find and correct the condition?

Go to Step 10

Go to Step 8

7

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

Did you find and correct the condition?

Go to Step 10

Go to Step 9

8

Important: Perform the setup procedure for the folding top control module.

  1. Replace the folding top control module. Refer to Folding Top Control Module Replacement .
  2. Perform the setup procedure for the folding top control module. Refer to Power Folding Top Learn .

Did you complete the replacement?

Go to Step 10

--

9

Replace the folding top closed switch. Refer to Folding Top Front Locating Pin Position Switch Replacement .

Did you complete the replacement?

Go to Step 10

--

10
  1. Use the scan tool in order to clear the DTCs.
  2. Close the hydraulic fluid bypass valve located above FT motor, turning it clockwise.
  3. Operate the vehicle within the Conditions for Running the DTC.

Does the DTC reset?

Go to Step 2

System OK