GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Regal 🢒 Body and Accessories 🢒 Body Control System 🢒 DTC B1015 VIN Information Error

Circuit Description

The BCM learns the Buick model that it is installed in by using the Vehicle ID information (VIN) via the class 2 serial data line. Each time the vehicle is in the RUN position or the PCM communicates this information via Class 2, the BCM internally compares the VIN information with that information stored in digits 2 through 5 of the VIN. If digit 5 of the VIN is incorrect, the BCM will indicate a VIN information error is present.

Conditions for Setting the DTC
    • The BCM detects digit 5 of the VIN is incorrect.
    • The condition must occur when the ignition switch is first turned on.

Action Taken When the DTC Sets

The BCM stores DTC B1015 in memory.

Conditions for Clearing the DTC
    • The BCM recognizes digit 5 of the VIN as valid information.
    • A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
    • Using a scan tool.

Diagnostic Aids

DTC B1015 is related to an internal VIN error in the BCM. The VIN information is not removable from the BCM; therefore, try reentering the VIN information and if it is still incorrect, replace the BCM. A service replacement BCM must be programed and configured to the vehicle. Use the scan tool in order to make sure the BCM is properly programmed and configured to the vehicle. Use the scan tool in order to make sure the BCM is properly programmed and configured for the correct Passlock and vehicle option content. Refer to Body Control Module (BCM) Programming/RPO Configuration BCM Programming/RPO Configuration for more information.

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. This step determines whether the condition is intermittent or the BCM is faulty.

Step

Action

Value(s)

Yes

No

1

Was the BCM Diagnostic System Check performed?

--

Go to Step 2

Refer to Diagnostic System Check - Body Control System

2

  1. Clear BCM DTCs. Refer to Clearing DTCs for more information.
  2. Reenter the VIN information into the BCM.
  3. Turn the ignition switch to the OFF position.
  4. Wait 10 minutes.
  5. Turn the ignition switch to the ON position.
  6. Check for BCM DTCs. Refer to Diagnostic Trouble Code (DTC) Displaying for more information.

Does BCM DTC B1015 reset as a current DTC?

--

Go to Step 3

Go to Step 4

3
  1. Replace the BCM. Refer to Body Control Module Replacement for more information.
  2. After replacing the BCM, perform the Setup New BCM procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration for more information.

Is the repair complete?

--

Go to Step 5

--

4

The malfunction is not present. Refer to Diagnostic Aids for additional information regarding DTC.

Is the repair complete?

--

Go to Step 5

--

5
  1. Turn the ignition switch to the OFF position.
  2. Reinstall connectors/components removed.
  3. Turn the ignition switch to the On position.
  4. Clear BCM DTCs. Refer to Clearing DTCs for more information.
  5. Check for BCM DTCs. Refer to Diagnostic Trouble Code (DTC) Displaying for more information.

Are there current BCM DTCs set?

--

Refer to Diagnostic System Check - Body Control System

System OK