GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 SSR 🢒 Restraints 🢒 SIR 🢒 DTC B1300

Circuit Description

The roof door module (RDM) checks the folding top outer latch position switch released signal circuit at least once every 200 milliseconds.

The folding top outer latch position switch is supplied with a constant ground source.

When the switch is active, the RDM will detect a switched ground signal on the folding top outer latch position switch released signal circuit indicating that the latch is released.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1300 Convertible Top/Moveable Roof Header Latched Sensor Circuit

Conditions for Running the DTC
    • The battery voltage is between 9-16  volts.
    • The ignition is in the Run or Accessory position or retained accessory power (RAP) is active.
    • A request for folding top open operation has been received by the RDM, and the RDM attempts to open the folding top.

Conditions for Setting the DTC

If the RDM detects inputs from either the folding top outer latch position switch latched or folding top outer latch position switch released signal circuits out of sequence during the folding top operation.

Action Taken When the DTC Sets
    • Stores a current and history DTC B1300 in the RDM.
    • Folding top operation is suspended.

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 source of an 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 Diagnostic System Check - Vehicle?

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. With a scan tool, observe the Header Latch Switch parameter in the data list for the roof door module (RDM).

When the roof is completely closed, the Header Latch Switch parameter will display Latched. When the roof is completely open, the Header Latch Switch will display Unlatched.

Does the scan tool display the appropriate switch state?

Go to Step 3

Go to Step 4

3
  1. Activate the folding top.
  2. With the scan tool, observe the Header Latch Switch parameter.

Does the Header Latch Switch parameter change state?

Go to Diagnostic Aids

Go to Step 4

4
  1. Turn OFF the ignition.
  2. Disconnect the folding top outer latch position switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Header Latch Switch parameter.

Does the scan tool display Transition?

Go to Step 7

Go to Step 5

5

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

    • An open or high resistance in the folding top outer latch position switch released signal circuit or folding top outer latch position switch ground circuit
    • A short to ground in the folding top outer latch position switch latched signal circuit

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 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 10

Go to Step 8

7

Inspect for poor connections at the harness connector of the folding top outer latch position 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 10

Go to Step 9

8

Important: Always perform the reinitialization of the power windows procedure for the RDM.

  1. Replace the RDM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
  2. Perform the reinitialization of the power windows procedure for the RDM. Refer to Power Window Reinitialization in Doors.

Did you complete the replacement?

Go to Step 10

--

9

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

Did you complete the replacement?

Go to Step 10

--

10
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC.

Does the DTC reset?

Go to Step 2

System OK