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Test Description

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 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. Verifies that the value displayed is within the specified range.
  2. 3. Tests for the proper operation of the circuit in the high voltage range.
  3. 4. Tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.
Fig 1: DTC B2645 - Diagnostic Chart (1 Of 2)
G01640398Courtesy of GENERAL MOTORS CORP.
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