For 1990-2009 cars

### Circuit Description

Modules can be configured with the applicable vehicle options. This code implies that a module was not configured either at the assembly plant or after replacement.

### Conditions for Running the DTC

The ignition switch is turned ON.

### Conditions for Setting the DTC

The DTC sets when a module is not configured properly.

### Conditions for Clearing the DTC

• | A current DTC B1001 will clear when the module is properly programmed.

• | A history DTC will clear after the modules ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

### Diagnostic Aids

The most likely reason for this DTC being set is due to incorrect calibration files downloaded to the module installed in the vehicle or the module was replaced without the recalibration having been performed.

### Test Description

The number below refers to the step number on the diagnostic table.

1. If DTC B1001 is set as current, reprogram the module.

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Body Control System Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems
1 | Did you perform the Diagnostic System Check for the system exhibiting the symptom? | Go to Step 2 | Go to Control Module References for the applicable Diagnostic System Check
2 |

1. Install the scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Retrieve the DTCs.

Is the DTC retrieved as current?

Go to Step 3

Go to Diagnostic Aids

3 | Perform the programming or setup procedure for the module. Refer to Control Module References for the proper procedure. Does the DTC reset? | Go to Step 4 | System OK
4 | Important: Perform the programming or setup procedure for the replaced control module. Replace the module. Refer to Control Module References for applicable replacement procedure. Did you complete the replacement? | System OK |