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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 713 (Theft Deterrent System) >> Diagnostic Information & Procedures >> DTC B3031: BCM Is In The Learn Mode But Does Not See A Valid Passlock™ Sensor Code >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

  1. 3)  - Tests for the proper operation of the 12V reference Security Sensor Power circuit, sensor ground circuit, and Passlock™ sensor signal (data) circuit. Troubleshoot the appropriate DTC prior to diagnosing DTC B3031.
    2. Fig 1: DTC B3031 Diagnosis
    G01712885Courtesy of GENERAL MOTORS CORP.
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