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Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis >> External Pages >> Different car >> Section 377 (Theft Deterrent System) >> Diagnostic Information and Procedures >> DTC B3031: Key Decoder Device in Assem Learn Mode >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 2. To set this code, a key with a working transponder was read by the theft deterrent control module. For that key to operate the vehicle, a 10 Minute or 30 Minute Re-Learn Procedure must be performed.
Fig 1: DTC B3031 Diagnosis Procedure (Step 1 To 3)
G01507495Courtesy of GENERAL MOTORS CORP.
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