GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2006 🢒 GTO 🢒 DTC 🢒 DTC B0002

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B0002 Emmobilizer-Engine Control Module (ECM) Communication Circuit

Conditions for Setting the DTC

Slip Ring Communication Error--Each time the body control module (BCM) receives a message with an invalid checksum via the slip ring a counter is incremented. Twenty consecutive bad messages must be received to set the DTC.

Test Description

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

  1. This step tests whether the condition is the module, the system, or a related condition.

    2.

  2. This step tests if the condition has been corrected or identified as specified in the supporting text.

Step

Action

Yes

No

Schematic Reference: Theft Deterrent System Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, monitor the DTC Information for DTC 2 in the body control module (BCM).

Does the scan tool indicate that DTC 2 is current?

Go to Step 4

Go to Step 3

3

Most occurrences of this DTC are caused by a faulty slip ring to key contact. Review the diagnostic aids and operate the vehicle to reproduce the fault.

Did vehicle operation cause this DTC to set?

Go to Step 4

System OK

4

  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within normal operating conditions.

Does the DTC reset?

Go to Theft Deterrent System Inoperative

System OK