Test Description

WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. 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.

15. A DMM must be used in this step. A test lamp may give incorrect results. Testing for B+ supply from the BCM.
16. An illuminated test lamp at step 16 reveals a short to voltage in the serial data circuit.

Fig 1: Keyless Entry System Inoperative Diagnostic Table (1 Of 3)

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Fig 2: Keyless Entry System Inoperative Diagnostic Table (2 Of 3)

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Fig 3: Keyless Entry System Inoperative Diagnostic Table (3 Of 3)

Courtesy of GENERAL MOTORS CORP.