GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 GL7 (Export) 🢒 DTC 🢒 DTC B2960 Invalid Coded Key Present

Schematic

Refer to Theft Deterrent System Schematics .

Circuit Description

When an ignition key is inserted into the ignition lock cylinder, the transponder embedded in the head of the key is energized by the exciter coils surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value, which is received by the VTD (Pass Key III®) Module . The VTD (Pass Key III®) Module then compares this value to a value stored in memory (learned key code). If the value is correct the VTD (Pass Key III®) Module sends the enable password via the class 2 serial data circuit to the PCM.

Conditions for Running the DTC

The ignition switch must be in RUN.

Conditions for Setting the DTC

If the code from the ignition key does not match one stored in memory, the VTD (Pass Key III®) Module sets this DTC. This code indicates the use of a key with a transponder that has not been learned by the VTD (Pass Key III®) Module. The vehicle considers this to be a theft attempt.

Action Taken When the DTC Sets
    • The VTD (Pass Key III®) Module sends a class 2 message containing a disable password to the PCM.
    • The vehicle will not start.
    • The VTD (Pass Key III®) Module sends a class 2 message to the instrument cluster to flash the SECURITY message.

Conditions for Clearing the MIL/DTC

The VTD (Pass Key III®) Module clears the current status of the DTC when it senses a valid, memorized, key code from the ignition key (transponder).

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. Verifies the condition for setting DTC B2960 is current.

    2.

  2. The only method to determine which re-learn procedure to perform.

    3.

  3. To set this code, a key with a working transponder that is not learned was read by the VTD (Pass Key III®) Module. For that key to operate the vehicle and one or more learned key's are available perform the Programming Additional Keys Procedure.

    4.

  4. To set this code, a key with a working transponder that is not learned was read by the VTD (Pass Key III®) Module. For that key to operate the vehicle and there is only one key available a 10 Minute or 30 Minute Re-Learn Procedure must be performed.

Step

Action

Yes

No

1

Did you perform A Vehicle Diagnostic System Check - Theft Deterrent ?

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2

Is DTC B2960 set as a current code?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

3

Are more than one of the vehicle's keys available?

Go to Step 4

Go to Step 6

4

  1. Attempt to start the vehicle using all of the vehicle's available keys.
  2. Using a scan tool, observe for any VTD DTCs.

Do any of the available key's start the vehicle?

Go to Step 5

Go to Step 6

5

With a learned master key perform the Programming Additional Keys Procedure on the suspect key. Refer to Programming Additional Keys .

Is the procedure complete?

Go to Step 7

--

6

Important: If a 10 Minute or 30 Minute Re-Learn Procedure is performed, all keys not learned at that time will be erased and will not be recognized. Perform the Programming Additional Keys Procedure on all keys or instruct the customer how to perform the Programming Additional Keys Procedure. Refer to Programming Additional Keys .

Perform the VTD (Pass Key III®) Module learn Procedure. Refer to Programming Replacement Keys, Ignition Cylinder, or Powertrain Control Module .

Is the procedure complete?

Go to Step 7

--

7
  1. Use a scan tool in order to clear the DTC's.
  2. Attempt to start the vehicle.

Does the DTC reset?

Go to Step 2

System OK