LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1659 (Theft Deterrent System) >> Diagnostic Information and Procedures >> DTCP1631: PCM Did Not Receive A Valid Password >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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. This DTC may set as a result of other Passlock System problems. Diagnose any BCM DTCs prior to continuing with this diagnostic.
  2. 3. A DTC B3031 may set in the body control module (BCM) during the Password Learn Procedure.
    Fig 1: DTC P1631
    G01718153Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals