GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 STS 🢒 DTC 🢒 DTC B1001

Circuit Description

The inflatable restraint sensing and diagnostic module (SDM) compares the restraint ID that is stored in the SDM to the restraint ID that is stored in the instrument panel module (IPM). The restraints ID that is being compared to contains the last 4 digits of SDM part number. When the ignition is turned ON, the SDM compares this information to the information stored in the IPM over the GMLAN communication circuit. If there is a mismatch between the information stored in the SDM and IPM, DTC B1001 will set.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1001 SDM Option Configuration Error

This vehicle has DTCs which include DTC symptoms. For more information on DTC symptoms, refer to DTC Symptom Description in Vehicle DTC Information.

DTC Symptom

DTC Symptom Descriptor

00

Option Configuration Error

Conditions for Running the DTC

Ignition 1 voltage is within the normal operating voltage range.

Conditions for Setting the DTC

B1001 symptom 00

    • The last 4 digits of the SDM part number does not match the last 4 digits stored in the IPM.
    • The VIN stored in the IPM does not match that of the vehicle.

Action Taken When the DTC Sets
    • The SDM commands ON the AIR BAG warning lamp via GMLAN serial data.
    • The SDM disables all deployments.

Conditions for Clearing the MIL/DTC

The restraints ID that is stored in the SDM matches the restraints ID that is stored in the IPM.

Diagnostic Aids

This DTC is an indication that an incorrect SDM is installed in the vehicle, or that the SDM and/or the IPM was replaced without reprogramming the IPM with the new information.

Test Description

The following numbers refer to the step numbers in the diagnostic table:

  1. This test checks to see if the correct VIN is programmed in the IPM.

    2.

  2. This step explains that the IPM must be programmed.

    3.

  3. This test checks to see if after clearing the DTCs, if this DTC is current then its possible that the wrong SDM has been installed.

Step

Action

Yes

No

Schematic Reference: SIR Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

    Important: J-45289 CANdi module must be used with the scan tool.

  1. Install a scan tool, request the SIR DTC display.
  2. Turn ON the ignition, with the engine OFF.

Does the scan tool indicate that DTC B1001 is current?

Go to Step 3

Go to Step 8

3

With the scan tool, verify that the instrument panel module (IPM) is programmed with the correct VIN that is stored in the IPM to the VIN plate of the vehicle.

Is the IPM programmed with the correct VIN?

Go to Step 5

Go to Step 4

4

Use the scan tool to program the correct VIN into the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the reprogramming procedure?

Go to Step 5

--

5

Using the scan tool, perform the Setup SDM Part Number into IPM, Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the reprogramming procedure?

Go to Step 6

--

6

  1. Use the scan tool to check to see if DTC B1001 is current.
  2. Clear the DTCs.
  3. Turn OFF the ignition then turn ON the ignition, with the engine OFF.

Does the scan tool indicate that this DTC is current?

Go to Step 7

Go to Step 8

7
  1. Turn OFF the ignition.
  2. Replace the SDM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 8

--

8
  1. Reconnect all SIR components.
  2. Verify that all components, connectors and connector position assurances (CPA)s are properly mounted.
  3. Use the scan tool in order to Clear the DTCs.
  4. Turn OFF the ignition then turn ON the ignition, with the engine OFF.
  5. Operate the vehicle within the Conditions for Running the DTC as specified in the text.

Does the DTC reset?

Go to Step 2

System OK